Abstract: A method, system (100), and a computer program product comprising a non-transient computer-readable medium (190) having stored thereon computer program code configured to control one or more processors (180) of a computer (170) for operating an HVAC installation (200, 300), wherein a set of enthalpies (H1,i, H2,i, H1,o, H2,o) and flow rates (?1, ?2) as variables of the HVAC installation (200, 300) is monitored and used for controlling the operation of said HVAC installation (200, 300), comprising the steps of: (a) dividing said set of enthalpies (H1,i, H2,i, H1,o, H2,o) and flow rates (?1, ?2) into a first and second subset; (b) measuring each variable of said first subset with a related sensor (110, 120) arranged in said HVAC installation (200, 300); and (c) determining the variables of said second subset from the measured variables of said first subset by using a mathematical and/or empirical relationship between the variables of said first and second subset.

Abstract: Disclosed herein is a refrigerator. The refrigerator includes a cold air generating device configured to generate cold air, a plurality of storage chambers arranged in at least a part of an area around the cold air generating device, a cold air guide unit configured to extend from the cold air generating device toward the plurality of storage chambers for guiding cold air generated from the cold air generating device selectively to the respective storage chambers, and a discharge guide unit configured to guide inside air of the respective storage chambers to the outside.

Abstract: A desiccant cooling system includes a desiccant cooling device partitioned into a desiccant cooling path and a regeneration path and including a desiccant rotor having one side on the desiccant cooling path and other side on the regeneration path and a cooler configured to cool high-temperature low-humidity air which has been dehumidified while passing through the one side of the desiccant rotor; and a vapor compression cooling device including a compressor configured to compress a refrigerant, a condenser configured to be cooled by the air cooled by passing through the cooler, and condenses the refrigerant compressed by the compressor, an expansion valve configured to expand the refrigerant condensed by the condenser, and an evaporator configured to evaporate the refrigerant expanded by the expansion valve and transfer the evaporated refrigerant to the compressor.

Abstract: A contactor for an air temperature and humidity control device is provided including a plurality of contact modules. Each contact module has a generally porous sidewall configured to define an internal space through which a hygroscopic material flows. A first airstream passes over a first portion of the plurality of contact modules. A second airstream passes over a second portion of the plurality of contact modules.

Abstract: An exhaust heat reclaim system may include a diverter valve selectively connected in fluid communication to an exhaust vent tube and an exhaust delivery tube and configured to selectively divert hot exhaust fluid discharged from an exhaust of a power generation device to at least one of the exhaust vent tube and the exhaust delivery tube. The exhaust heat reclaim system may be a component of an HVAC system and be configured to discharge hot exhaust fluid onto a heat exchanger of the HVAC system, where the heat exchanger may be configured to promote heat transfer between the hot exhaust fluid and a refrigerant flowing through the heat exchanger of the HVAC system.

Abstract: An enclosure defines a confined space configured to store goods that can be advantageously maintained by controlling the water vapor levels to which the goods are exposed. A water vapor conversion element, at which liquid water is converted to water vapor, can be operably associated with the confined space to distribute that water vapor to the confined space. A water delivery unit is operatively associated with the water vapor conversion element and is configured to deliver water in liquid form to the water vapor conversion element. The water delivery unit can comprise a drip chamber configured to deliver the water essentially one drop at a time. The enclosure can comprise a drawer in a refrigeration appliance such as a household refrigerator. A sensor configured to determine the water vapor level present in the confined space can be operable to selectively control the distribution of water vapor to the confined space.

Abstract: A vertical heat pump has a vertical fan coil housing containing a fan, a coil, and a discharge plenum. A cavity is formed within the fan coil housing. A humidity steam generator is disposed within the cavity. A steam dispersion tube is mounted within an airstream to be generated by the fan for delivering steam via the discharge plenum. A steam transfer tube connects the steam generator to the steam dispersion tube.

Abstract: A controller controls the operations of a humidity control apparatus and an air conditioner. The controller includes a power consumption detector, a target value setting processor, and an operation control unit. The power consumption detector detects the power consumption of the humidity control apparatus and the air conditioner. The target value setting processor performs optimal target value setting processing by performing first or second processing. The first processing lowers a target operating frequency of a humidity controlling compressor and a target evaporation temperature in a utilization-side heat exchanger. The second processing raises the target operating frequency and the target evaporation temperature. The optimal target value setting processing sets the target operating frequency and the target evaporation temperature so as to minimize the power consumption.

Abstract: It has been discovered that precise control of relative humidity within the Spray Chill rooms of meat processing facilities can help control carcass water weight loss. Through the use of a specially designed air wash system this loss can be controlled. As an additional beneficial effect of this process, it has been proven that a significant reduction of airborne bacteria can be seen through the application of proper air wash sump chemistry through the specialized process. Further to this development, and in combination with the proper sump chemistry humidifying system, continual cleaning of the process air and internal areas of the air handler as well as the filter and fill materials is seen, allowing for a continual cleansing of the system while delivering sanitized air and providing high room humidity for the control of water loss during the carcass chilling operation and the reduction of airborne bacteria in the spray chill room or any meat storage area.

Abstract: This invention relates in general to air exchange systems and, in particular, to an improved energy recovery ventilator, a cross flow plate core associated therewith and a method of conditioning air for a building. In one aspect, the invention provides a cross flow plate core comprising: a left hand wafer comprising a left hand spacer with a first of a plurality of membranes bonded thereto, the left hand spacer comprising a plurality of parallel curvilinear rails which form channels for receiving a first stream of air; and a right hand wafer comprising a right hand spacer with a second of the plurality of membranes bonded thereto, the right hand spacer comprising a plurality of parallel curvilinear rails which form channels for receiving a second stream of air, wherein the left hand spacer of the left hand wafer is bonded to the top of the membrane of the right hand wafer.

Abstract: The technology described herein provides a device and methods for meat storage, tenderizing, and aging in a temperature and humidity controlled environment. A portable electric cooler is disclosed having first and second sets of low pressure coils coupled to a compressor and three-way solenoid valves in order to alternate in a timed pattern the refrigerant flow in order to allow one set of low pressure coils to defrost while the other set circulates the refrigerant. The cooler includes a temperature sensor, humidity sensor, and humidity controller to monitor and control temperature and humidity levels within the refrigeration chamber. The cooler also includes a pressurized water canister, a spray nozzle, and a pulse solenoid valve. The pulse solenoid valve is configured to discharge a mist through the spray nozzle into the refrigeration chamber as required to maintain a desired humidity.

Abstract: A heating and ventilating and air conditioning system includes an evaporative cooler positioned upstream from an evaporator. The evaporative cooler defines a primary airstream and a secondary airstream flowing transversely to the primary airstream. The output temperature To of the primary airstream is maintained by controlling the mass flow rate ratio of the secondary airstream to the primary airstream. By controlling the mass flow rate ratio, cooler air from the primary airstream is provided to the evaporator, thereby improving the efficiency of the overall system.

Abstract: An air conditioning system for a motor vehicle includes an air conditioning box through which blower air can flow and in which an evaporator and, at a distance therefrom, a heat exchanger are arranged, and including an air distributor which has air outlet openings which may be controlled by air control elements, and a water outlet arranged between the evaporator and heat exchanger, and having a control arrangement for forcibly ejecting the blower air emerging at the evaporator via the water outlet into the vehicle environment. For the purpose of forcibly ejecting the loaded blower air in a cost-effective and construction-space-saving manner without losses in efficiency, the control arrangement may be formed in the air outlet openings by the air control elements which, during the ejection, are forcibly closed.

Abstract: A method and apparatus for applying a thin film of water to a solar energy impacted surface, especially a building, while frequently testing itself for leaks or breaks in the piping system, testing for failure of one or more valves, or malfunction of the control system. By measuring the rate of evaporation, and the level of absorption of fluid by the surface, the apparatus applies fluid at appropriate times to achieve nearly 100% evaporation, thereby maximizing its cooling effects. While maintaining a narrow temperature excursion from one water cycle to the next, the system provides alternating wet and dry conditions on the roof, discouraging biological growth. The apparatus includes a master control valve capable of preventing all water sources from providing water in the event of any component or system failure. By so doing, any failure is “fail-safe”, rather than “fail-catastrophic.

Abstract: An air cycling type air-conditioner includes: a heat exchanger (3); a compressor (1) compressing suction air and transferring the compressed air to the heat exchanger (3), and compressing air transferred from the heat exchanger (3) and transferring the compressed air as supply air; an expander (4) expanding the suction air and transferring the expanded air to the heat exchanger (3), and expanding air transferred from the heat exchanger (3) and transferring the expanded air as the supply air; and a motor (2) driving the compressor (1) and the expander (4).

Abstract: An apparatus for maintaining an enclosed space proximate a selected comfort level, and for conserving utilities, the apparatus comprising a housing in communicating relation with the enclosed space and the external environment and having an evaporative cooler for cooling the enclosed space and having a predetermined operating efficiency, and a spaced apart air conditioner for either selectively cooling or heating the enclosed space, having a baffle that restricts airflow to the air conditioner and an operating efficiency different from the evaporative cooler, and a control mechanism for automatically and selectively switching back and forth from operation of the evaporative cooler to the air conditioner in response to ambient conditions of the external environment and the operating efficiencies of the evaporative cooler and the air conditioner.

Abstract: An apparatus for maintaining an enclosed space proximate a selected comfort level, and for conserving utilities, the apparatus comprising a housing in communicating relation with the enclosed space and the external environment and having an evaporative cooler for cooling the enclosed space and having a predetermined operating efficiency, and a spaced apart air conditioner for either selectively cooling or heating the enclosed space, having a baffle that restricts airflow to the air conditioner and an operating efficiency different from the evaporative cooler, and a control mechanism for automatically and selectively switching back and forth from operation of the evaporative cooler to the air conditioner in response to ambient conditions of the external environment and the operating efficiencies of the evaporative cooler and the air conditioner.

Abstract: An environmental control system for maintaining a predetermined air temperature and relative humidity level of the interior of an enclosure, such as a wine cellar. A liquid chiller is provided which is adapted to cool liquid being circulated therethrough. An air handler has a cabinet with a heat exchanging unit and a blower disposed therein. The heat exchanging unit is operatively connected to the liquid chiller to receive cooled liquid being discharged therefrom. The blower is adapted to direct air from the enclosure over the heat exchanging unit such that the enclosure air is cooled. A liquid cascade unit has at least one surface with an upper and lower portion and a liquid collection pan attached to that lower portion. The upper portion is operatively connected to the heat exchanging unit such that liquid flows down from the upper portion toward the lower portion and into the liquid collection pan.