Abstract: A method of controlling operation of an air conditioning system (10) includes measuring a compressor speed of one or more chillers (12) of an air conditioning system and measuring a refrigerant pressure of the one or more chillers of the air conditioning system. A chiller load is calculated using the compressor speed and the refrigerant pressure. An air conditioning system includes one or more chillers. Each chiller includes a compressor (22), a condenser (30) operably connected to the compressor, and an evaporator (28) operably connected to the compressor and the condenser. A controller (34) is operably connected to the one or more chillers and is configured to calculate a chiller load utilizing a measurement of compressor speed and a measurement of refrigerant pressure of the chiller.

Abstract: The present disclosure relates to a climate management system having a control system configured to control climate characteristics of a building. The control system further includes a memory device and a processor. The memory device includes instructions that, when executed by the processor, cause the processor to receive, via a sensor, data indicative of an evaporator coil temperature of the climate management system, and operate an air mover of the climate management system to control supply of conditioned air to the building based on the evaporator coil temperature.

Abstract: Variable air flow air conditioning (HVAC) systems including a method of cooling or heating a structure having at least two zones. In example embodiments, individual air flow rates of the at least two zones are measured, and a control system adjusts the individual air flow rates to maintain an instantaneous measured net volumetric air flow rate at a preset volumetric air flow rate as if there was a single fan operating the system.

Abstract: A packaged terminal air conditioner unit (PTAC) includes an auxiliary fan configured for urging a flow of make-up air from the outdoor portion into the indoor portion through a vent aperture defined by a bulkhead. A vent door is pivotally mounted over the vent aperture and a flow restrictor extends into the flow of make-up air, the flow restrictor being movable in correlation to a flow rate of the flow of make-up air to increase the flow restriction at higher flow rates of make-up air.

Abstract: An air-conditioning system, in particular for a motor vehicle, having a refrigerant circuit, which has an evaporator and a condenser, and a coolant circuit, wherein the refrigerant circuit and the coolant circuit are thermally coupled to each other, in particular in the region of the evaporator and in the region of the condenser, wherein the coolant circuit has a line system having junctions, wherein a heating body, a cooling body, an outside heat exchanger, an additional heat source, a first bypass line, and a second bypass line are integrated into the line system, wherein the first bypass line bypasses the additional heat source from the cooling body to the outside heat exchanger, and/or the second bypass line bypasses the additional heat source from the heating body to the outside heat exchanger.

Abstract: A system and method for controlling the operation of heating, ventilating, and air conditioning (HVAC) equipment so as to achieve a desired range of a sound pressure level and/or a sound power level is described. The system and method can lead to a desired range of a sound pressure level and/or a sound power level for a zone using equipment that is typically included in HVAC systems. Such control of equipment can be important for privacy and comfort requirements.

Abstract: A device for air-conditioning a room may be provided comprising at least one heat sink having at least one boundary surface facing the room, which can be brought to a temperature that is reduced in relation to the heat load, wherein at least one surface element is arranged between the boundary surface and the room, said surface element being at least partially permeable to heat radiation. A method may be provided for air-conditioning a room comprising at least one heat sink having at least one boundary surface facing the room, which is brought to a temperature that is reduced in relation to the heat load, wherein at least one surface element is arranged between the boundary surface and the room, said surface element being at least partially permeable to heat radiation.

Abstract: A computer room includes rack mounted computing devices and multiple air handling systems for cooling the computer room. A model based cooling control system is implemented on resources of a provider network that includes the rack mounted computing devices. The model based cooling control system uses a model of the computer room to iteratively perform calculations to determine a set of control parameters for cooling the computer room. The set of control parameters are selected to reduce or optimize an amount of energy and/or water used to cool the computer room while satisfying one or more conditions for cooling the computer room such as a maximum allowable temperature of the room and/or a maximum allowable temperature of the rack mounted computing devices in the computer room.

Abstract: In accordance with embodiments of the present disclosure, a modular fluid-handling system may include an air-handling and mixing unit and a cooling unit. The air-handling and mixing unit may include an air mover plenum and a first mixing plenum. The air mover plenum may have an air mover configured to move air and the air mover plenum may air mover plenum may be configured to be in fluid communication with an outside environment via a first damper and configured to be in fluid communication with a primary structure. The first mixing plenum may be configured to be in fluid communication with the air mover plenum via a second damper and configured to be in fluid communication with the outside environment via a third damper.

Abstract: An engine driven heat pump includes a compressor clutch to switch between an ON state where drive from an engine is transmitted to a compressor and an OFF state where transmission of the drive from the engine to the compressor is cut off, an engine actuation battery to actuate the engine, a battery charging circuit configured to charge the engine actuation battery, and an inverter configured to convert output power from a generator into a predetermined voltage and a predetermined frequency, and when the compressor clutch is placed into the ON state from the OFF state or placed into the OFF state from the ON state during a self-sustaining operation, engine revolutions, which are revolutions of the engine, are set to reference revolutions required for the generator to supply predetermined power.

Abstract: A chiller system and a control method thereof includes a plurality of chiller modules in which a refrigeration cycle is performed to supply cold water, a main control device generating an operation signal to simultaneously or successively operate the plurality of chiller modules, a module control device provided in each of the plurality of chiller modules to control an operation of each of the plurality of chiller modules on the basis of the operation signal of the main control device, and a starting device communicably connected to the module control device to selectively apply power into the plurality of chiller modules.

Abstract: A climate control device for conditioning the climate of a plurality of components and an interior of an electric vehicle, the climate control device having a plurality of fluid circuit units, which are configured to heat and/or cool the electric vehicle, a first fluid circuit unit being configured to control the climate of a first component of the electric vehicle, a second fluid circuit unit being configured to control the climate of the interior of the electric vehicle, a coolant circuit being configured to control the climate and dehumidify the interior of the electric vehicle, and a third fluid circuit unit being configured to utilize the waste heat of the second heat source.

Abstract: A self-contained air unit for installation on a roof top of a building has a pressure relief opening that is independent of the air circulation system of the unit. The air circulation system has a first blower and the pressure relief opening has a damper system that connects the pressure relief opening to ambient air through two passages. One of the passages contains a second blower to exhaust air from the air circulation system and from the independent pressure relief opening simultaneously. A two-stage pressure relief hood is provided for use with a self-contained air unit.

Abstract: A fuel cell is provided to furnish electrical power to an HVAC&R system, and the waste heat from the fuel cell is transferred to a secondary fluid directed to flow to the climate-controlled space of a building during periods of time in which heating is required. The heat rejected by the fuel cell may be a supplemental or primary source of heat as well used for precise temperature control within the climate-controlled space of the building. A channeling assembly is used to selectively direct the fuel cell heat either to and/or away from the climate-controlled space served by the HVAC&R system. Higher energy efficiencies of the HVAC&R equipment are achieved, and the “cold blow” phenomenon is reduced or eliminated.

Abstract: In a method of operating an air conditioning unit to reduce moisture varying operations, psychrometric chart data is accessed. In addition, a constraint is set on the relationship between the temperature of air supplied by the air conditioning unit and the relative humidity of the air supplied based upon information contained in the psychrometric chart data. The air conditioning unit is controlled based upon the constraint to thereby reduce moisture varying operations of the air conditioning unit.

Abstract: An air handling system including at least one terminal unit for maintaining a serviced volume at a predetermined temperature below the temperature of the air supplied by the central source of the air handling system is provided through the use of a refrigerant means in the form of a passive thermal energy recovery device which provides heat transfer between the outgoing and inflowing air streams provided by the a central air handling system. The heat transfer between air streams is regulated as a function of air velocity and temperature differentials as measured at various points in system which are related specifically to the serviced volume. Environmental control within the serviced volume is exercised by controlling face and bypass dampers to regulate the air flow through the passive heat exchanger and the air exchange rate is controlled by modulating the operation of the dampers or by regulating the air flow into or out of the serviced volume by way of supply and/or exhaust louvers.

Abstract: An air handling system including at least one terminal unit for maintaining a serviced volume at a predetermined temperature below the temperature of the air supplied by the central source of the air handling system is provided through the use of a refrigerant means in the form of a passive thermal energy recovery device which provides heat transfer between the outgoing and inflowing air streams provided by the a central air handling system. The heat transfer between air streams is regulated as a function of air velocity and temperature differentials as measured at various points in system which are related specifically to the serviced volume. Environmental control within the serviced volume is exercised by controlling face and bypass dampers to regulate the air flow through the passive heat exchanger and the air exchange rate is controlled by modulating the operation of the dampers or by regulating the air flow into or out of the serviced volume by way of supply and/or exhaust louvers.

Abstract: An indoor space is externally enclosed and thermally insulated by an underfloor insulating layer, a wall insulating layer and a ceiling insulating layer. An underfloor ventilation layer is defined between a floor and the underfloor insulating layer, and a ceiling ventilation layer is formed between a ceiling and the ceiling insulating layer. Communication is established through the underfloor ventilation layer, the indoor space and the ceiling ventilation layer, via floor vents and ceiling vents. Outdoor air is drawn into the indoor space from an air intake. Air is expelled from the ceiling ventilation layer into an underroof space by ventilation fans and then discharged outdoors from underroof outlets. A heat exchange ventilator is disposed in the ceiling ventilation layer, whereby heat exchange takes place between air in the ceiling ventilation layer and incoming fresh outdoor air. After the heat exchange, the incoming air is delivered into the underfloor ventilation layer.

Abstract: This invention generally relates to a thermostat system for use in thermal regulation of an environment.This invention involves thermal regulation systems for controlling the temperature of an environment and the thermostat systems used in thermal regulation systems. The invention provides a pair of contacts and a creep action bi-metal thermostat, electrically connected to the pair of contacts. The bi-metal thermostat provides an electrical connection between the pair of contacts when the thermostat is exposed to temperatures within one defined range, and the thermostat interrupts any electrical connection between the pair of contacts when the thermostat is exposed to temperatures that are outside of the defined range. A capacitor, is electrically connected between the contacts, in parallel with the creep action bi-metal thermostat to prevent heating caused by electrical arcing within the bi-metal thermostat from altering the performance of the bi-metal thermostat.

Abstract: Air-conditioning installation for room spaces (1), comprising a heat transfer device (4) for preheating supply air (A) by transferring heat from exhaust air (B) into the supply air; heating means including a heating source (11) for further heating the supply air; cooling means including a cooling source (14) for cooling the supply air; and adjusting means (16, 17, 18, 21, 32, 33, 34) for sensing the temperature of the supply air and for controlling the heat transfer device and the heating and cooling means on the basis of the sensed temperature. To simplify the structure of the installation, the heating and cooling sources (11, 14) are connected to the heat transfer device (4) so that the preheating, further heating and cooling of the supply air take place through the common heat transfer device.