Abstract: A heating installation comprising: —a first circuit (C1); —a second circuit (C2); —a first heat pump (4) for heating the medium in the first circuit; —a first heat exchanger (10) arranged in the second circuit (C2) and connected between a condenser (4b) and an expansion valve (4d) of the first heat pump; —a second heat pump (11) arranged for heating a medium by absorbing heat energy from the medium in the second circuit; and —a second heat exchanger (12) and a third heat exchanger (14) for transferring heat from the medium in the second circuit to water in a water supply line (13). The second heat exchanger (12) is connected to the water supply line upstream of the third heat exchanger (14) in order to allow the second heat exchanger to preheat the tap hot-water in a first step and the third heat exchanger to preheat the tap hot-water in a subsequent second step.

Abstract: An electronic expansion valve (EEV) is employed in refrigeration systems to regulate the flow of refrigerant through an evaporator. The position of the EEV is controlled through a first control loop that generates a first position signal based on superheat feedback associated with the refrigeration system, and a second control loop that generates a second position signal based on pressure feedback associated with the refrigeration system. The larger of the first position signal and the second position signal is selected to control the position of the EEV value, and the selected position signal is provided in feedback to both the first control loop and the second control loop.

Abstract: A drive controller for a motor of a compressor includes a drive circuit that applies voltages to windings of the motor. The drive controller includes a speed control module that controls the drive circuit to rotate the motor at a requested speed. The drive controller includes a speed determination module that generates the requested speed. The drive controller includes a defrost module that enables a defrost mode in response to a defrost command. While the defrost mode is enabled, the defrost module causes the speed determination module to (i) ramp the requested speed down from a speed demand to a defrost speed and (ii) maintain the requested speed at the defrost speed for a predetermined period of time.

Abstract: An apparatus for cooling a computer system includes a primary cooling loop. The primary cooling loop includes an evaporator configured to cool at least a component of the computer system, an ambient cooled condenser connected to the evaporator, a first pump to provide a coolant flow within the cooling loop, a pressure regulator configured to maintain a selected pressure in the primary cooling loop, and a controller responsive to changes in outdoor ambient conditions and an amount of heat dissipated by the computer system and configured to dynamically adjust the pump and pressure regulator in response thereto.

Abstract: The inside of a casing constituting an indoor unit of an air-conditioning apparatus is laterally divided by an air passage partition so that an air passage chamber housing an indoor fan and an indoor heat exchanger is defined close to a casing side panel. A space in the casing close to the casing side panel is further vertically divided by a partition having through holes so that a pipe connection chamber housing parts of the extension pipes, flare joints, and indoor pipes is defined in an upper portion and a pipe draw-out chamber in which the extension pipes are arranged is defined in a lower portion. Gaps between outer peripheries of the extension pipes and inner peripheries of the through holes are filled with insulations.

Abstract: A refrigeration cycle apparatus includes a refrigerant circuit including a compressor, an indoor heat exchanger, an expansion device, and an outdoor heat exchanger connected to each other via refrigerant pipes. The outdoor heat exchanger includes a heat transfer pipe, and a plurality of fins. The outdoor heat exchanger is configured so that a ratio of a heat capacity of the plurality of fins to a total of heat capacities of the heat transfer pipe and the plurality of fins is not more than 50%. The refrigeration cycle apparatus has a mixed defrosting operation mode in which a hot gas defrosting operation and a reverse-defrosting operation are performed in sequence. In the hot gas defrosting operation, hot gas discharged from the compressor is supplied to the outdoor heat exchanger. In the reverse-defrosting operation, refrigerant passing through the indoor heat exchanger is supplied from the compressor to the outdoor heat exchanger.

Abstract: A thermostatic valve for a cooling system of an engine of a motor vehicle, having a thermostatic valve housing, on which a connection to a cylinder head of the engine, a connection to the engine block, a connection to a cooler of the cooling system and at least one connection to a bypass channel are designed, wherein a movable thermostatic operating element, a cooler valve, an engine block valve and a slide for closing the bypass channel are arranged in the thermostatic valve housing. The thermostatic valve has a first slide section is provided for closing a first opening arranged on the thermostatic valve housing and at least one second slide section for closing at least one second opening arranged on the thermostatic valve housing.

Abstract: A cooling system suitable for cooling food on board an aircraft is provided which includes a chiller device and a first cooling circuit which is adapted to feed cooling energy generated by the chiller device to at least one cooling station, the chiller device includes a second cooling circuit formed separately from the first cooling circuit and is thermally coupled to the first cooling circuit.

Abstract: A thermostat assembly for a marine engine, having a housing with a first bore and a second bore in communication with the first bore. A thermostat mounts within the first bore for movement between an open and a closed position. A plunger removably mounts within the second bore for movement between an extended position for engagement with the thermostat, and a retracted position for disengagement with the thermostat.

Abstract: According to one embodiment, a thermostat includes a main body, a rotatable input component that is rotatably coupled with the main body, and a rotation detection system that is configured to sense user rotation of the rotatable input component. The rotatable input component is configured to be rotated by a user to enable the user to provide input to the thermostat. The rotation detection system includes a magnetic component that is positioned on an inner surface of the rotatable input component and that is magnetized so as to have a plurality of alternating north and south magnetic regions. The rotation detection system also includes a sensor that is positioned adjacent the magnetic component. The sensor is configured to detect polarity changes as the rotatable input component and magnetic component are rotated relative to the sensor.

Abstract: An insulated icemaking compartment is provided in the fresh food compartment of a bottom mount refrigerator. The icemaking compartment may be integrally formed with the liner of the fresh food compartment, or alternatively, may be modular for installation anywhere in the fresh food compartment. A removable bin assembly with a front cover normally seals the icemaking compartment to maintain the temperature in the compartment. A cold air duct formed in the rear wall of the refrigerator supplies cold air from the freezer compartment to the icemaking compartment. A return air duct directs a portion of the air from the icemaking compartment back to the freezer compartment. An air vent in the icemaking compartment directs another portion of air into the fresh food compartment. A control system provides for controlling refrigerator functions in a manner that promotes energy efficiency.

Abstract: Disclosed is an air conditioning system, comprising M outdoor units (101) for providing warm or cold sources, M being a positive integer; N indoor units (102) for receiving a warm or cold source supplied by one or more of the at least one outdoor unit (101), N being a positive integer; a control system (103) comprising a lubricating oil distributing subsystem (1031) connected to the M outdoor units (101); a cold medium distributing subsystem (1032) connected to the M outdoor units (101); and a control subsystem (1033) connected to the M outdoor units (101), the N indoor units (102), the lubricating oil distributing subsystem (1031) and the cold medium distributing subsystem (1032). Further disclosed are a control system and an air-conditioning control method.

Abstract: Electrical power is provided to power consuming, heat-exhausting devices by multiple gas-fueled electrical power sources located near such devices. Exhaust heat from such devices is utilized as intake cooling air for the gas-fueled power sources, thereby excluding them from cooling capacity requirements. The gas piping delivering gas to gas-fueled power sources is positioned so as to be within hot aisles comprising exhaust heat. The gas piping is located up high for lighter than air gasses and near the floor for heavier than air gasses, with leak detection located nearby. Additionally, gas piping is externally coated with material that visually indicates a leak. By locating gas piping in the hot aisle, exhausted heat increases temperature and, thereby, pressure of the gas, resulting in more efficient gas distribution through the piping and preventing valve freezing. Furthermore, the gas piping is located after potential ignition sources in the airstream.

Abstract: A heat pump and a control method thereof, the control method of the heat pump which heats a heated space through heat exchange between outdoor air and a refrigerant and heat exchange between the refrigerant and circulation water, includes calculating the maximum allowable frequency of a compressor based on the temperature of the outdoor air and the heating load of the heated space, calculating the mean operating frequency of the compressor while the compressor is operated at the calculated maximum allowable frequency, recalculating the maximum allowable frequency based on a result of comparison between the mean operating frequency and the maximum allowable frequency, and operating the compressor at the recalculated maximum allowable frequency, thereby improving coefficient of performance (COP) of the heat pump.

Abstract: A heat source unit has a capacity-variable heat source-side compressor and a heat source-side heat exchanger which functions as a radiator of refrigerant. Usage units are connected to the heat source unit and have usage-side heat exchangers, respectively, which function as evaporators of refrigerant and cool an aqueous medium. An operating capacity controller controls the capacity of the heat source-side compressor so that evaporation temperature of refrigerant of each of the usage-side heat exchangers reaches a first target evaporation temperature. A decision unit calculates second target evaporation temperatures at which outlet temperatures of the aqueous medium in the usage-side heat exchangers of the respective operating usage units reach predetermined set temperatures, and decides a minimum value of the second target evaporation temperatures as the first target evaporation temperature.

Abstract: A method and system for dynamic power allocation in a transport refrigeration system (TRS) is provided. The method includes a TRS power source operating in an operational state. The method also includes monitoring an amount of current being drawn from one or more generator powered components of the TRS. Also, the method includes calculating, via a TRS controller of the TRS, a maximum available horsepower amount based on the amount of current being drawn from the one or more generator powered components. Further, the method includes controlling, via the TRS controller, an amount of horsepower directed to a compressor of the TRS based on the maximum available horsepower amount.

Abstract: A temperature control system employing a two-phase refrigerant and a compressor/condenser loop is disclosed wherein a two phase refrigerant condenses within the load, the system including a thermo-expansion valve that simultaneously allows refrigerant flow through the thermo-expansion valve and regulates a temperature of the refrigerant in its two phase state ahead of the thermo-expansion valve, and wherein a flow through the thermo-expansion valve occurs only after a pressure and temperature upstream of the thermo-expansion valve reaches a final temperature and pressure.

Abstract: When a refrigerant flow-path switch performs switching to a first refrigerant flow path, an interior condenser heating air blown into an interior as a first temperature-adjustment subject and an auxiliary heat exchanger are connected in parallel, and the auxiliary heat exchanger heats air blown to a battery as a second temperature-adjustment subject. In contrast, when the refrigerant flow-path switch performs switching to a second refrigerant flow path, an interior evaporator cooling air blown into the interior and the auxiliary heat exchanger are connected in parallel, and the auxiliary heat exchanger cools the air blown to the battery. With this arrangement, one common auxiliary heat exchanger can cool or heat the air for the battery, thereby leading to reduction in size of an entire refrigeration cycle device.

Abstract: A air conditioning control device is configured to estimate whether or not the temperature of refrigerant on a high-pressure side in a heat pump device is equal to or lower than a predetermined low temperature and to switch a flow path switching device to an air-heating start-up mode when it is estimated that the temperature of refrigerant on the high-pressure side in the heat pump device is equal to or lower than the predetermined low temperature and switch the flow path switching device to a normal air-heating mode when it is estimated that the temperature of refrigerant on the high-pressure side in the heat pump device is higher than the predetermined low temperature.

Abstract: Techniques for use with vent covers of furnace ductworks are described herein. A vent cover may include a fan to actively pull air from the ductwork and into a room at least in part in response to a number of open or closed vents in ductwork to which the vent cover is connected. Active air movement through the vent cover may lower air pressure and/or temperature within the ductwork and increase airflow through heat exchangers of the furnace, thereby compensating for zones created by closed vent covers. A system may monitor factors consistent with a furnace over-temperature event, such as furnace operation, closed vent covers, high air pressure or temperature in ductwork, etc. A fan of a vent cover may be turned on to actively draw air through a vent covered by the vent cover. The fan may turn off after conclusion of at least one of the monitored factors.