A heat pump, the heat pump having a first end and a second end and further comprising: a working fluid and a chamber to contain said working fluid, the chamber having a first end and a second end corresponding to the first and second ends of the pump, one wall of the chamber acting as a heat exchanger between the chamber and a first heat transfer medium and one wall of the chamber, which may or may not be the same wall as the first mentioned one wall, acting as a heat exchanger between the chamber and a second heat transfer medium. The first heat transfer medium is located at a position between the first end of the pump and an intermediate portion defined at a position between the first and second ends of the heat pump, the first heat transfer medium operationally has a temperature T at the end nearest the intermediate portion, and operationally has a temperature higher than temperature T at the end located nearest the first end of the pump. The second heat transfer medium is located at a position between the intermediate portion and the second end of the pump, and has a temperature T at the end nearest the intermediate portion in operation of the heat pump, and a temperature lower than T at the end nearest the second end of the pump in operation of the heat pump, the second heat transfer medium operationally has a lower average temperature than the first heat transfer medium. The chamber has at least one moveable wall, one said moveable wall being driven by an external energy source and being configured to adjust the volume of the chamber, and one said moveable wall, which may or may not be the same wall as the first mentioned one said movable wall, being arranged to be driven by an external energy source and being capable of adjusting the shape of the chamber while keeping the volume of the chamber constant. The driven movements of the at least one moveable wall producing a repeating cycle including the following phases: a first phase in which the volume of the chamber is decreased; a second phase in which the shape of the chamber can be altered without a change in chamber volume so that a greater volume of the working fluid is at the second end of the chamber than is at the first end of the chamber; a third phase in which the volume of the chamber is increased; and a fourth phase in which the shape of the chamber can be altered without a change in chamber volume so that a greater volume of the working fluid is at the first end of the chamber than is at the second end of the chamber; this cycle causing a net flow of heat into the first heat transfer medium from the working fluid, and causing a net flow of heat from the second heat transfer medium into th

A gas compressor, comprising a compressor chamber comprising a chamber inlet for gas and a chamber outlet for gas A gas heating device comprising a heater chamber having a heater inlet for gas and a heater outlet for gas. The gas heating device being arranged to heat gas present in the heater chamber, thereby raising its pressure to a heated pressure and ejecting a first portion of the heated gas through the heater outlet into the compressor chamber retaining a second portion of the heated gas in the heater chamber, thereby compressing gas present in the compressor chamber by applying pressure on said gas with said first portion of the heated gas, while lowering the gas pressure in the heater chamber below the heated pressure,

A controller for controlling an environmental condition of a building via building equipment includes a user interface configured to present information to a user, an air quality sensor configured to sense indoor air quality conditions, a communications interface configured to communicate with a server system and receive outdoor air quality data from the server system, and a processing circuit. The processing circuit is configured to generate indoor air quality data based on the sensed indoor air quality data conditions sensed by the air quality sensor, receive, via the communications interface, the outdoor air quality data from the server system, and generate one or more interfaces indicating the indoor air quality conditions and the outdoor air quality conditions based on the indoor air quality data and the outdoor air quality data and cause the user interface to display the one or more interfaces.

A controller for controlling an environmental condition of a building via building equipment includes a user interface configured to present information to a user, an air quality sensor configured to sense indoor air quality conditions, a communications interface configured to communicate with a server system and receive outdoor air quality data from the server system, and a processing circuit. The processing circuit is configured to generate indoor air quality data based on the sensed indoor air quality data conditions sensed by the air quality sensor, receive, via the communications interface, the outdoor air quality data from the server system, and generate one or more interfaces indicating the indoor air quality conditions and the outdoor air quality conditions based on the indoor air quality data and the outdoor air quality data and cause the user interface to display the one or more interfaces.

An induced groundwater flow closed loop geothermal system provides safety associated with closed loop geothermal systems (e.g., no mixing of surface water, closed system fluid, and groundwater) and efficiency associated with open loop geothermal systems (e.g., increased heat transfer provided by groundwater flow). A heat exchanger connected to an external system is located in a hole in a geological formation. The hole has a depth below where groundwater is located. A fluid from the external system is routed through the heat exchanger. A pump is utilized to induce groundwater flow from the geological formation, across the heat exchanger and back to the geological formation to enable thermal transfer between the fluid and the groundwater and the groundwater and the geological formation. A casing may be located in the hole to provide structural support and grouting materials may be used to fill space around the casing enabling a groundwater flow path.

An induced groundwater flow closed loop geothermal system provides safety associated with closed loop geothermal systems (e.g., no mixing of surface water, closed system fluid, and groundwater) and efficiency associated with open loop geothermal systems (e.g., increased heat transfer provided by groundwater flow). A heat exchanger connected to an external system is located in a hole in a geological formation. The hole has a depth below where groundwater is located. A fluid from the external system is routed through the heat exchanger. A pump is utilized to induce groundwater flow from the geological formation, across the heat exchanger and back to the geological formation to enable thermal transfer between the fluid and the groundwater and the groundwater and the geological formation. A casing may be located in the hole to provide structural support and grouting materials may be used to fill space around the casing enabling a groundwater flow path.

An embodiment multi-way coolant valve includes an outer housing including first to third outer inlets, first to third outer outlets, and a pump mount portion coupled to one of the outer outlets, an inner housing rotatably provided within the outer housing and including penetration holes corresponding to the outer inlets and outlets, a coolant line defined by a selective connection of the penetration holes such that the outer inlets and outlets are selectively connected, pads interposed between an interior circumference of the outer housing and an exterior circumference of the inner housing at locations of the outer inlets and outlets, respectively, and a driving device connected to a rotation center of the inner housing to selectively rotate the inner housing within the outer housing, wherein the inner housing is configured to rotate by a preset interval according to a selected vehicle mode.

A thermal transpiration flow heat pump includes an evaporator that vaporizes a medium, a condenser that condenses the medium, and a medium transport unit that is provided between the evaporator and the condenser. The medium transport unit includes a medium-temperature heat source portion that is placed on a side of the evaporator, a high-temperature heat source portion that is placed on a side of the condenser, and a thermal transpiration flow pump that is placed between the medium-temperature heat source portion and the high-temperature heat source portion.

When starting a cooling operation mode from a non-operating mode, the blower device of the indoor unit from which the start command is originated is operated. When starting a heating operation mode from a non-operating mode, the blower device of the indoor unit from which the start command is originated is operated after the heat medium temperature becomes equal to or greater than a preconfigured temperature.

When starting a cooling operation mode from a non-operating mode, the blower device of the indoor unit from which the start command is originated is operated. When starting a heating operation mode from a non-operating mode, the blower device of the indoor unit from which the start command is originated is operated after the heat medium temperature becomes equal to or greater than a preconfigured temperature.