AIR SUPPLY SYSTEM AND METHOD
An air supply system of an atmosphere control system is provided. The air supply system may incorporate features to condition an air stream before the air stream is directed toward an air separation device. A temperature of the air stream to the air separation device may be reduced to help condense moisture in the air stream. The air stream with the lowered temperature may be directed through a moisture removal device to help remove moisture in the air stream. The air stream may also be directed through a particle removal device to help remove particles in the air stream. The air stream may be directed through a heat recovery device to regulate the temperature of the air stream before being directed to the air separation device.
The disclosure herein relates to an air supply system of an atmosphere control system such as, for example, in a storage unit. More specifically, the disclosure is directed to an air supply system that may include features to help condition an air stream before the air stream is directed through an air separation device (e.g. a nitrogen separation system), and a method thereof.
BACKGROUNDIn a storage unit (e.g. a transport unit), atmosphere in a storage space of the storage unit may be controlled to help prolong the shelf life of perishable goods such as, for example, fruits and vegetables. In some cases, for example, an atmosphere control system may be configured to separate nitrogen from the air and supply the nitrogen to the storage space, so that an oxygen level and/or carbon dioxide level in the storage space may be controlled. A nitrogen and/or CO2 and/or O2 separation device, such as a nitrogen separation membrane, may be included in the atmosphere control system to help separate the nitrogen from the air.
SUMMARYEmbodiments as disclosed herein provide systems, apparatuses and methods to condition an air stream before the air stream is directed through an air separation device to help increase or maintain an efficiency of the air separation device.
In some embodiments, an atmosphere control system, for example, in a storage unit (e.g. a transport unit) may generally include an air supply system and an air separation device. The air supply system may incorporate features to condition an air stream before the air stream is directed toward the air separation device. The air supply system may be configured, for example, to help regulate a temperature of the air stream, and/or remove moisture and/or particles from the air stream. By regulating a temperature of the air stream, a separation efficiency of the air separation device can be increased and an overall performance of the atmosphere control system can be increased. The air supply system may help increase the efficiency and/or lifespan of the air separation system. The air supply system may also form a heat exchange relationship with a refrigeration unit (e.g. a transport refrigeration unit (TRU)) so that a cooling or hot part of the refrigeration system may be used to condition the air stream in the air supply system.
In some embodiments, the air supply system may include a first heat exchanger, a second heat exchanger, and a moisture reduction device. In some embodiments, the first heat exchanger may be configured to lower a temperature of an air stream supplied to the air supply system. Lowering the temperature of the air stream may help saturate the moisture in the air stream to form droplets, which can help remove the moisture from the air stream.
In some embodiments, the moisture reduction device may be configured to remove moisture (e.g. droplets) in the air stream after the temperature of the air stream is reduced in the first heat exchanger. In some embodiments, the second heat exchanger may be configured to raise the temperature of the air stream after the air stream is directed out of the moisture reduction device.
In some embodiments, the air supply system may include a particle reduction device, which may be configured to remove particles in the air stream. In some embodiments, the particle reduction device may be positioned downstream of the moisture reduction device to receive the air stream. In some embodiments, the air supply system may also include a chemical pollution reduction device (e.g., an activated carbon filter) for removing chemical pollution (e.g., oil vapors, ozone, hydrocarbons, etc.). In these embodiments, the device can be positioned downstream of the particle reduction device.
In some embodiments, the first heat exchanger may be configured to form a heat exchange relationship with a cold part of the refrigerant system such as, for example, an evaporator of the refrigeration. The cold part of the refrigeration system generally refers to components, devices or refrigerant lines of the refrigeration system that may carry a refrigerant having a temperature that is lower than the ambient temperature. In some embodiments, the first heat exchanger may be configured to be positioned inside a storage space of the temperature controlled storage unit so that the relatively cold air in the storage space of the storage unit may be used to lower the temperature of the air stream.
In some embodiments, the second heat exchanger may be configured to form a heat exchange relationship with a hot part of the refrigeration system such as, for example, a condenser of the refrigeration system.
In some embodiments, an air compressor may be configured to provide an air stream to the air supply system. In some embodiments, the second heat exchanger may be configured to form a heat exchange relationship with the air stream provided by the air compressor.
In some embodiments, the air supply system may include a first temperature sensor configured to measure a first temperature of the air stream directed out of the first heat exchanger and a second temperature sensor configured to measure a second temperature of the air stream directed out of the second heat exchanger.
In some embodiments, a method of conditioning an air stream for an air separation device may include providing an air stream; lowering a temperature of the air stream; removing moisture from the air stream with the lowered temperature; and increasing the temperature of the air stream after removing moisture from the air stream.
In some embodiments, the method of conditioning the air stream may include removing particles from the air stream. In some embodiments, removing particles from the air stream may be conducted after removing moisture from the air stream. Also, in some embodiments, an additional filter can be provided to remove chemical pollution from the air stream.
In some embodiments, lowering the temperature of the air stream may include forming a heat exchange relationship between the air stream with an evaporator of a refrigeration system. In some embodiments, increasing the temperature of the air stream after removing moisture from the air stream may include forming a heat exchange relationship between the air stream with a condenser of a refrigeration system. In some embodiments, increasing the temperature of the air stream after removing moisture from the air stream may include forming a heat exchange relationship between the air stream and the air stream compressed by a compressor.
In some embodiments, the storage unit can be a TRU.
Other features and aspects of the systems, methods, and control concepts will become apparent by consideration of the following detailed description and accompanying drawings.
Reference is now made to the drawings in which like reference numbers represent corresponding parts throughout.
Atmosphere in a storage unit (e.g. a cargo space of a transport unit) may be controlled to help, for example, prolong the shelf life of perishable goods. In some cases, for example, components separated from air (e.g. nitrogen, and/or CO2, and/or O2) may be supplied to the storage space to replace oxygen and/or carbon dioxide in the storage space, which may help reduce a ripening effect of the perishable goods. A nitrogen separation device, such as a nitrogen separation membrane, may be used to help separate nitrogen from the air. A separation efficiency of the nitrogen separation device, such as the nitrogen separation membrane, may be affected, for example, by a temperature, humidity and or a particle content of the air supplied to the nitrogen separation device.
An air supply system that incorporates features to condition an air stream before the air stream is directed through an air separation device (e.g. a nitrogen separation membrane) and a method of conditioning the air stream supplied to the air separation device are describe herein. In some embodiments, a temperature of the air stream may be reduced to help saturate moisture in the air stream. In some embodiments, the air stream with the lowered temperature may be directed through a moisture removal device to help remove moisture in the air stream. In some embodiments, the air stream may be directed through a particle removal device to help remove particles in the air stream. In some embodiments, the air supply system may also be directed through a chemical pollution reduction device (e.g., an activated carbon filter) for removing chemical pollution (e.g., oil vapors, ozone, hydrocarbons, etc.). In some embodiments, the air stream may be directed through a heat recovery device to regulate the temperature of the air stream before the air stream being directed through an air separation device. In some embodiments, the air stream may be directed through an air separation device such as, for example, a nitrogen separation membrane.
References are made to the accompanying drawings that form a part hereof, and in which is shown by way of illustration of the embodiments in which the embodiments may be practiced. It is to be understood that the term used herein are for the purpose of describing the figures and embodiments and should not be regarded as limiting the scope. The term “air separation” is generally defined as separation of components (e.g. nitrogen, oxygen, carbon dioxide and/or argon) from atmosphere air.
Referring to
The term “air separation” refers to a process to separate atmospheric air into different components, typically nitrogen and oxygen, and sometimes also argon, carbon dioxide, or other rare inert gases. Various types of air separation device 110 may be used. For example, the air separation device 110 may be a pressure swing membrane, or a cryogenic distillation device. It is to be appreciated that other methods and systems may also be used to remove components from the air, such as for example, sorption (absorption/desorption or chemisorption) or catalytic conversion. It is to be appreciated that the atmosphere control system as described herein can be configured to be suitable for various methods and systems for air separation or components removal.
The air stream 105 may be provided to the air supply system 100 by, for example, the air compressor 145. The compression of the air stream 105 by the air compressor 145 may increase a temperature of the air stream. In addition, the air stream 105 may include some moisture, and/or solid and liquid particles. When the air compressor 145 compresses the air stream 105, the moisture and particle concentrations in the air stream 105 may be increased. An efficiency of the air separation device 110 may be affected by, for example, the moisture and/or particle content of the air stream 105. To help increase and/or maintain the efficiency of the air separation device 110, the air supply system 100 may be configured to include features to help condition the air stream 105, which may include removing moisture and/or particles from and/or regulating a temperature of the air stream 105, so that the air stream 105 provided to the air separation device 110 may have desired air parameters (e.g. a moisture content, a particle content, a temperature) to for desired performance of the air separation device 110.
Generally, the air supply system 100 may be configured to lower the temperature of the air stream 105 to increase a relative humidity and/or achieve air saturation with the moisture content. The moisture may start to create droplets, which may be removed relatively easily. The same principle may not only apply to a water content, but may also apply to, for example, oil fume or other types of vapor. The droplet formation may also help reduce particle content in the air stream 105. After removing the moisture and/or particle content, the air supply 100 may be configured to condition (e.g. heat up) the air stream 105 so that the temperature of the air stream 105, for example, may be in a desired range for the desired performance of the air separation device 110.
The air supply system 100 illustrated in
The air stream 105 may be provided to the air supply system 100 by the air compressor 145. The first heat exchanger 130 may be configured to lower the temperature of the air stream 105 when the air stream 105 flows through the first exchanger 130. The first heat exchanger 130 may be, for example, thermally coupled to a cold part of a refrigeration system 140 so that the first heat exchanger 130 forms a heat exchange relationship with the cold part of the refrigeration system 140. In some embodiments, the first heat exchanger 130 can form a heat exchange relationship with, for example, heat exchanger tubes of an evaporator of the refrigeration system 140, so that cold refrigerant in the evaporator of the refrigeration system 140 may help lower the temperature of the air stream 105 in the first heat exchanger 130. The first heat exchanger 130 may be, for example, a tube-in-shell or tube-by-tube design. The cold part of the TRU generally refers to components, devices or refrigerant lines of the TRU that may carry a refrigerant having a temperature that is lower than the ambient temperature. In some embodiments, the first heat exchanger 130 may not form a direct heat exchange relationship with the refrigeration system 140. The first heat exchanger 130 may be, for example, positioned in the storage space 122, and cold air in the storage space 122 may help lower the temperature of the air stream 105 in the first heat exchanger 130. In some embodiments, the first heat exchanger 130 may be positioned in an airflow directed out of the refrigeration system 140.
The air stream 105 may then be directed through the moisture reduction device 132 to remove, for example, water droplets in the air stream 105. The air stream 105 may be directed through the particle reduction device 134 to remove, for example, particles in the air stream 105. It is to be appreciated that in some embodiments, the particle reduction device 134 may also be positioned upstream of the moisture reduction device 132.
The air stream 105 leaving the particle reduction device 134 may be, for example, directed through the second heat exchanger 136 to help regulate the temperature of the air stream 105 before the air stream 105 is directed through the air separation device 110. Typically, the temperature of the air stream 105 directed out of the particle reduction device 134 may be relatively low, because the temperature of the air stream 105 may be lowered in the first heat exchanger 130. The second heat exchanger 136 may be configured to increase the temperature of the air stream 105 to, for example, the desired temperature for the desired performance of the air separation device 110.
In the illustrated embodiment of
In some embodiments, there is no need to regulate an amount and/or direction of air stream 105. In some embodiments, it may be desirable to regulate the amount and/or direction of air stream 105. It is to be appreciated that one or more valves may be used in the air supply system 100 to regulate, for example, an amount and/or a direction of the air stream 105. In the illustrated embodiment of
In some embodiments, the first valve 137, the second valve 139 and the line connecting the first and second valves 137, 139 may not be necessary. The air stream 105 can be directed into the second heat exchanger 136, the first heat exchanger 130 and the moisture reduction device 132 without going through a valve configured to control an amount or direction of the air stream 105.
It is to be appreciated that the embodiment in
In operation, the first and second valves 137, 139 may be modulated to control the air stream 105 enters and/or by-passes the first and/or second heat exchangers 130, 136. By controlling the amount of air stream 105 entering or by-passing the first and/or second heat exchangers 130, 136, the temperature of the air stream 105 may be controlled.
In the illustrated embodiment of
The first temperature sensor 141 can help provide temperature information of the air stream 105 before the air stream 105 is directed into the moisture reduction device 132. It is to be appreciated that the first temperature sensor 141 is optional, and is not necessary in some embodiments.
The second temperature sensor 143 may be configured to measure a second temperature of the air stream 105 before the air stream 105 is directed through the air separation device 110. The second temperature of the air stream 105 may be, for example, a desired temperature for obtaining optimal efficiency of the air separation device 110. The valves 137, 139 may also be modulated and/or throttled (e.g. on and off) to meet the desired second temperature.
It is to be appreciated that the temperature of the air stream 105 may also be regulated by regulating the first and/or second heat exchangers 130, 136. For example, by regulating an amount of heat exchanged in the first and/or second heat exchangers 130, 136.
The air supply system 100 provides a way to regulate the temperatures of the air stream 105. The air supply system 100 may be configured to lower the temperature of the air stream 105 so as to help remove moisture content from the air stream 105, and/or provide the desired temperature of the air stream 105 for the air separation device 110. The air compressor 145 configured to provide the air stream 105 to the air supply system 100 may be a variable speed or a fixed speed compressor. By using the temperature sensors 141, 143 to measure the temperatures of the air stream 105, and regulating the air supply system 100 based on the measured temperatures, the temperatures of the air streams 105 directed toward the moisture reduction device 132 and the air separation device 110 may be controlled to meet the desired temperatures. This may help increase the efficiency and/or the lifespan of the air separation device 110.
In some embodiments, the air compressor 145 may be a variable speed compressor that can regulate a temperature of the air stream 105 by changing the speed of the compressor. Generally, the temperature of the air stream 105 is relatively high when the operation speed of the variable speed air compressor 145 is relatively high. However, using the variable speed compressor 145 to change the temperature of the air stream 105 may affect an amount of the air stream 105 provided to the air separation device 110. The air supply system 100 as disclosed herein may add another way to regulate the temperature of the air stream 105 without affecting the amount of air stream 105 provided to the air separation device 110. In some embodiments, when the air compressor 145 has a fixed operation speed, the temperature of the air stream 105 may not be regulated by changing the speed of the compressor. The air supply system 100 as disclosed herein may regulate the temperature of the air stream 105 without changing the operation speed of the air compressor 145 or affecting the amount of the air stream 105 provided to the air separation device 110.
A method of conditioning an air stream for an air separation device may include: providing an air stream (e.g. the air stream 105 provided by the air compressor 145); lowering a temperature of the air stream (e.g. lowering the temperature of the air stream 105 in the first heat exchanger 130); removing moisture from the air stream with the lowered temperature (e.g. removing the moisture in the air stream 105 in the moisture reduction device 132; and increasing the temperature of the air stream after removing moisture from the air stream (e.g. increasing the temperature of the air stream 105 in the second heat exchanger 136).
In some embodiments, the method of conditioning the air stream may include removing particles from the air stream (e.g. removing the particles from the air stream 105 in the particle reduction device 134). In some embodiments, removing particles from the air stream may be conducted after removing moisture from the air stream.
In some embodiments, lowering the temperature of the air stream may include forming a heat exchange relationship between the air stream and a cold part (e.g. an evaporator) of a refrigeration system. In some embodiments, increasing the temperature of the air stream after removing moisture from the air stream may include forming a heat exchange relationship between the air stream with a hot part (e.g. a condenser) of a refrigeration system. In some embodiments, increasing the temperature of the air stream after removing moisture from the air stream may include forming a heat exchanger relationship between the air stream and the air stream compressed by an air compressor (e.g. the air stream compressed by the air compressor 145).
It is to be appreciated that in some embodiments, an operational condition(s) (e.g. purity and/or concentration of air separated by the air separation device 110 may be measured. The measurement can help protect the air separation device 110 from abnormal operation. The embodiments as disclosed herein can help protect the air separation device 110 from, for example, water damage. The embodiments as disclosed herein can also help the efficiency of the air separation device 110 by regulating the temperature of the air stream 105 directed into the air separation device 110.
The atmosphere control system 560 includes an air supply system 500 and an air separation device 510. The air supply system 500 may be configured to condition an air stream (such as, for example, the air stream 105 in
The atmosphere control system 560 may be integrated into the TRU 532, with the appreciation that the atmosphere control system 560 may be separate from the TRU 532. In some embodiments, the atmosphere control system 560 may form a heat exchange relationship(s) with the TRU 532, so that a cold part (e.g. an evaporator) and/or a hot part (e.g. a condenser) may be used to condition (cool down and/or heat up) the air stream in the atmosphere control system 560.
It is to be appreciated that the embodiments as described herein work with other types of transport unit such as, for example, a railway car, a shipping container, or an airplane cargo unit. The embodiments as described herein may also be used with a stationary storage unit such as, for example, a refrigerator, or a cold room.
It is to be appreciated that the embodiments as described herein may work with other types of air separation devices. For example, some membranes may be configured to separate other components from the atmosphere air. Generally, the embodiments as disclosed herein provide systems, apparatuses and methods to condition an air stream before the air stream is directed through an air separation device to help increase or maintain an efficiency of the air separation device.
Aspects
Any of aspects 1-12 can be combined with any of aspects 13-20. Any of aspects 13-17 can be combined with any of aspects 18-20.
Aspect 1. An air supply system, comprising:
-
- a first heat exchanger;
- a second heat exchanger; and
- a moisture reduction device;
- wherein the first heat exchanger is configured to lower a temperature of an air stream supplied to the air supply system,
- the moisture reduction device is configured to remove moisture in the air stream after the air stream is directed out of the first heat exchanger; and
- the second heat exchanger is configured to raise the temperature of the air stream after the air stream is directed out of the moisture reduction device.
Aspect 2. The air supply system of aspect1, further comprising: - a particle reduction device, wherein the particle reduction device is configured to remove particles in the air stream after the air stream is directed out of the moisture reduction device.
Aspect 3. The air supply system of any of aspects 1-2, wherein an air stream to the air supply system is provided by an air compressor.
Aspect 4. The air supply system of any of aspects 1-3, wherein the first heat exchanger is configured to form a heat exchange relationship with a cold part of a refrigeration system.
Aspect 5. The air supply system of any of aspect 4, wherein the first heat exchanger is configured to form the heat exchange relationship with an evaporator of the refrigeration system.
Aspect 6. The air supply system of any of aspects 1-5, wherein the first heat exchanger is configured to be positioned inside a temperature controlled storage unit.
Aspect 7. The air supply system of any of aspects 5-6, wherein the first heat exchanger is configured to be positioned in an airflow inside the temperature controlled storage unit.
Aspect 8. The air supply system of any of aspects 1-7, wherein the second heat exchanger is configured to form a heat exchange relationship with a hot part of a refrigeration system.
Aspect 9. The air supply system of any of aspects 1-8, wherein the second heat exchanger is configured to form a heat exchange relationship with a condenser of the refrigeration system.
Aspect 10. The air supply system of any of aspects 3-9, wherein the second heat exchanger is configured to form a heat exchange relationship with an air stream compressed by the air compressor.
Aspect 11. The air supply system of any of aspects 1-10, further comprising: - a first temperature sensor configured to measure a first temperature of the air stream directed out of the first heat exchanger; and
- a second temperature sensor configured to measure a second temperature of the air stream directed out of the second heat exchanger,
- wherein the air supply system is configured so that the first temperature and the second temperature meet desired values.
Aspect 12. The air supply system of any of any of aspects 1-11, wherein the air stream directed out of the second heat exchanger is directed to an air separation device.
Aspect 13. The air supply system of any of aspects 1-12, wherein the first heat exchanger is coupled to a refrigeration system so as to direct a portion of expanded refrigerant into the first heat exchanger.
Aspect 14. The air supply system of any of aspects 1-13 further comprising: - a third heat exchanger positioned downstream of the second heat exchanger; wherein the third heat exchanger is coupled to a refrigerant system so as to direct a portion of refrigerant compressed by a compressor of the refrigerant system into the third heat exchanger, and exchange heat with the air stream directed through the third heat exchanger.
Aspect 15. A transport unit, comprising: - a transport refrigeration unit;
- an air supply system, comprising:
- a first heat exchanger;
- a second heat exchanger; and
- a moisture reduction device;
- wherein the first heat exchanger is configured to lower a temperature of an air stream supplied to the air supply system,
- the moisture reduction device is configured to remove moisture in the air stream after the air stream is directed out of the first heat exchanger; and
- the second heat exchanger is configured to raise the temperature of the air stream after the air stream is directed out of the moisture reduction device; and
- an air separation device, wherein the air stream form the air supply system is directed to the air separation device.
Aspect 16. The transport unit of aspect 15, wherein the transport refrigeration unit further comprising an evaporator, - wherein the first heat exchanger is configured to form a heat exchange relationship with the evaporator of the transport refrigeration unit.
Aspect 17. The transport unit of any of aspects 15-16, further comprising a cargo space, - wherein the first heat exchanger is configured to be positioned inside the cargo space of the transport unit.
Aspect 18. The transport unit of any of aspects 15-17, wherein the transport refrigeration unit further comprises a condenser, wherein the second heat exchanger is configured to form a heat exchange relationship with the condenser of the transport refrigeration unit.
Aspect 19. The transport unit of any of aspects 15-18, further comprising: - a compressor configured to provide the air stream to the air supply system, wherein the second heat exchanger is configured to form a heat exchange relationship with the air stream provided by the air compressor.
Aspect 20. A method of conditioning an air stream for an air separation device, comprising: - providing an air stream;
- lowering a temperature of the air stream;
- removing moisture from the air stream with the lowered temperature;
- increasing the temperature of the air stream after removing moisture from the air stream; and
- directing the air stream into the air separation device.
Aspect 21. The method of conditioning the air stream of aspect 20, further comprising: - removing particles from the air stream after removing moisture from the air stream.
Aspect 22. The method of conditioning the air stream of aspects 20-21, wherein lowering the temperature of the air stream includes forming a heat exchange relationship with an evaporator of a transport refrigeration unit.
With regard to the foregoing description, it is to be understood that changes may be made in detail, without departing from the scope of the present invention. It is intended that the specification and depicted embodiments are to be considered exemplary only, with a true scope and spirit of the invention being indicated by the broad meaning of the claims.
Claims
1. An air supply system, comprising:
- a first heat exchanger;
- a second heat exchanger; and
- a moisture reduction device;
- wherein the first heat exchanger is configured to lower a temperature of an air stream supplied to the air supply system,
- the moisture reduction device is configured to remove moisture in the air stream after the air stream is directed out of the first heat exchanger; and
- the second heat exchanger is configured to raise the temperature of the air stream after the air stream is directed out of the moisture reduction device.
2. The air supply system of claim 1, further comprising:
- a particle reduction device, wherein the particle reduction device is configured to remove particles in the air stream after the air stream is directed out of the moisture reduction device.
3. The air supply system of claim 1, wherein an air stream to the air supply system is provided by an air compressor.
4. The air supply system of claim 1, wherein the first heat exchanger is configured to form a heat exchange relationship with a cold part of a refrigeration system.
5. The air supply system of claim 4, wherein the first heat exchanger is configured to form the heat exchange relationship with an evaporator of the refrigeration system.
6. The air supply system of claim 1, wherein the first heat exchanger is configured to be positioned inside a temperature controlled storage unit.
7. The air supply system of claim 5, wherein the first heat exchanger is configured to be positioned in an airflow inside the temperature controlled storage unit.
8. The air supply system of claim 1, wherein the second heat exchanger is configured to form a heat exchange relationship with a hot part of a refrigeration system.
9. The air supply system of claim 1, wherein the second heat exchanger is configured to form a heat exchange relationship with a condenser of the refrigeration system.
10. The air supply system of claim 3, wherein the second heat exchanger is configured to form a heat exchange relationship with an air stream compressed by the air compressor.
11. The air supply system of claim 1, further comprising:
- a first temperature sensor configured to measure a first temperature of the air stream directed out of the first heat exchanger; and
- a second temperature sensor configured to measure a second temperature of the air stream directed out of the second heat exchanger,
- wherein the air supply system is configured so that the first temperature and the second temperature meet desired values.
12. The air supply system of claim 1, wherein the air stream directed out of the second heat exchanger is directed to an air separation device, wherein the air separation device removes carbon dioxide from the air stream and includes at least one of a pressure swing membrane, a cryogenic distillation device, a sorption device, and a catalytic conversion device.
13. A transport unit, comprising:
- a transport refrigeration unit;
- an air supply system, comprising: a first heat exchanger; a second heat exchanger; and a moisture reduction device; wherein the first heat exchanger is configured to lower a temperature of an air stream supplied to the air supply system, the moisture reduction device is configured to remove moisture in the air stream after the air stream is directed out of the first heat exchanger; and the second heat exchanger is configured to raise the temperature of the air stream after the air stream is directed out of the moisture reduction device; and
- an air separation device, wherein the air stream form the air supply system is directed to the air separation device.
14. The transport unit of claim 13, wherein the transport refrigeration unit further comprising an evaporator,
- wherein the first heat exchanger is configured to form a heat exchange relationship with the evaporator of the transport refrigeration unit.
15. The transport unit of claim 13, further comprising a cargo space,
- wherein the first heat exchanger is configured to be positioned inside the cargo space of the transport unit.
16. The transport unit of claim 13, wherein the transport refrigeration unit further comprises a condenser, wherein the second heat exchanger is configured to form a heat exchange relationship with the condenser of the transport refrigeration unit.
17. The transport unit of claim 13, further comprising:
- a compressor configured to provide the air stream to the air supply system, wherein the second heat exchanger is configured to form a heat exchange relationship with the air stream provided by the air compressor.
18. A method of conditioning an air stream for an air separation device, comprising:
- providing an air stream;
- lowering a temperature of the air stream;
- removing moisture from the air stream with the lowered temperature; and
- increasing the temperature of the air stream after removing moisture from the air stream.
19. The method of conditioning the air stream of claim 16, further comprising:
- removing particles from the air stream after removing moisture from the air stream.
20. The method of conditioning the air stream of claim 16, wherein lowering the temperature of the air stream includes forming a heat exchange relationship with an evaporator of a transport refrigeration unit.
21. The transport unit of claim 13, wherein the air separation device removes carbon dioxide from the air stream and includes at least one of a pressure swing membrane, a cryogenic distillation device, a sorption device, and a catalytic conversion device.
22. The method of claim 18, further comprising removing carbon dioxide from the air stream using at least one of a pressure swing membrane, a cryogenic distillation device, a sorption device, and a catalytic conversion device.
Type: Application
Filed: Jun 11, 2015
Publication Date: Apr 20, 2017
Inventors: Radim CERMAK (Prague), Jiri ZITA (Brno), Lubos FOREJT (Statenice)
Application Number: 15/317,781