An industrial installation having a primary supply circuit in which cooling water is conveyed and a consumer to which cooling water from the primary supply circuit is provided and which is connected to the primary supply circuit via a secondary supply circuit. An outward flow line of the secondary supply circuit is connected to an outward flow line of the primary supply circuit, and a return flow line of the secondary supply circuit is connected to a return flow line of the primary supply circuit. The outward flow line of the primary supply circuit is connected to a groundwater delivery line of a spring installation which has a groundwater delivery line through which groundwater can be conveyed from an aquifer and can be fed as cooling water into the outward flow line of the primary supply circuit. Also provided is a method for operating an industrial installation wherein the cooling water that is used is naturally occurring groundwater which is obtained from an aquifer with the aid of a spring installation.

In most buildings energy for space heating and cooling can be used to maintain the thermal comfort of the building's human occupants by maintaining the interior air temperature at a set point. If one could maintain the human occupant's thermal comfort while decreasing the heating or increasing the cooling set point, energy savings are possible. Many embodiments implement methods and systems of tunable emissivity surfaces in improving building efficiency. Several embodiment implement tuning the thermal emissivity of interior building surfaces at long-wave infrared wavelengths to maintain thermal comfort.

A refrigeration cycle apparatus (1) is capable of performing a refrigeration cycle using a small-GWP refrigerant. The refrigeration cycle apparatus (1) includes a refrigerant circuit (10) and a refrigerant enclosed in the refrigerant circuit (10). The refrigerant circuit includes a compressor (21), a condenser (23), a decompressing section (24), and an evaporator (31). The refrigerant contains at least 1,2-difluoroethylene.

A refrigeration cycle apparatus (1) is capable of performing a refrigeration cycle using a small-GWP refrigerant. The refrigeration cycle apparatus (1) includes a refrigerant circuit (10) and a refrigerant enclosed in the refrigerant circuit (10). The refrigerant circuit includes a compressor (21), a condenser (23), a decompressing section (24), and an evaporator (31). The refrigerant contains at least 1,2-difluoroethylene.

A concentric pipe geothermal heat exchanger well head is described. The well head may include a riser pipe having an outer pipe and an inner core pipe, wherein an inner heat exchanger pipe is coupled to the inner core pipe, a reducer coupled to an outer heat exchanger pipe on one side and coupled to the outer pipe on a second opposite side to conduct fluid between the outer heat exchanger pipe and the outer pipe, a flow pipe parallel to and biaxial with the riser pipe configured to be coupled to a geothermal heat pump, and an elbow coupled to the outer pipe to couple fluid between the outer pipe and the well head pipe.

The heat-medium cycle circuit includes a discharge mechanism including a discharge valve, the discharge mechanism being configured to, when the discharge valve is open, discharge air present inside the heat-medium cycle circuit to the outside of the heat-medium cycle circuit. The air-conditioning apparatus is configured to execute an air discharge operation mode in which the air present inside the heat-medium cycle circuit is discharged to the outside of the heat-medium cycle circuit. The air discharge operation mode includes a first operation mode, and a second operation mode performed after the first operation mode. The first operation mode is an operation mode in which, with the discharge valve being closed, an operation similar to a cooling operation is performed. The second operation mode is an operation mode in which, with the discharge valve being open, an operation similar to a heating operation is performed.

The invention relates to a process for cooling air-conditioning water used to air-condition a hospital building, comprising the steps of: (a) providing nitrogen in liquid form (LIN); (b) providing oxygen in liquid form (LOX); (c) providing air-conditioning water to be cooled; and (d) performing a heat exchange (4) between the air-conditioning water to be cooled and the nitrogen in liquid form (LIN) and/or the oxygen so as to cool the air-conditioning water and to vaporize the nitrogen and/or the oxygen and obtain nitrogen in gaseous form (GAN) and/or oxygen in gaseous form (GOX).

A packaged air turnover unit is described herein. The packaged air turnover comprises a compressor and condenser within a housing of the packaged air turnover unit. The packaged air turnover unit further includes one or more heat exchanges to cool air and one or more heaters to heat air, providing either cooling or heating to a space depending on the configuration of the unit.

A heat transfer system includes a conduit having open first and second ends, first and second thermal exchange segments disposed in-between and in fluid communication with the ends, and a means for adding fluid to the first end. The first thermal exchange segment is disposed underneath and in thermal communication with the ground, a body of water, or other location with a different temperature. The first and second ends are arranged above all other section of conduit and relative to one another so that they are communicating vessels and a change in fluid level in one changes the fluid level in the other. The means for adding fluid to the first end of the conduit causes fluid to flow freely from the first end to the second end and fluid level to rise in the second overcoming any hydrostatic pressure in the system without a pump disposed along the conduit.

A climate-control system may include a vapor-compression circuit and an air handler assembly. The vapor-compression circuit may include a compressor, an outdoor heat exchanger, and first and second working-fluid-fluid flow paths. The first and second working-fluid-flow paths are in fluid communication with the outdoor heat exchanger. The first working-fluid-flow path may include a first expansion device and a first indoor heat exchanger. The second working-fluid-flow path may include a second expansion device and a second indoor heat exchanger. The first and second indoor heat exchangers are disposed within the air handler assembly. The air handler assembly includes a return-air-inlet duct, first and second airflow paths, and a supply-air-outlet duct. The first airflow path may receive air from the return-air-inlet duct and houses the first indoor heat exchanger. The second airflow path may receive air from the return-air-inlet duct. The supply-air-outlet duct receives air from the first and second airflow paths.