A composite refrigeration system includes a refrigeration part, a heat dissipation part, a first pipeline, a second pipeline, and a refrigerant. The refrigeration part uses the refrigerant to cool air sent into indoor space, and the heat dissipation part is configured to perform heat dissipation on the refrigerant. In addition, in two heat dissipation modes, the heat exchanger may exchange heat between the refrigerant and a heat carrier in an external pipeline network to implement heat dissipation. The composite refrigeration system implements, by using the heat exchanger, a function of exchanging heat with the external pipeline network, so that heat generated during operation of the composite refrigeration system can be at least partially transferred to the heat carrier in the external pipeline network, to implement the energy recycle and reuse.

Non-potable, utility water is circulated by a pump in a closed loop. The utility water is heated by a heat pump. Heat exchange from the utility water heats domestic hot water on demand, eliminating or reducing the need for domestic hot water storage tanks and storage of large quantities of water. In the present invention, fluctuations in condenser water temperature are dampened internally in a condenser water buffer and a control system.

Non-potable, utility water is circulated by a pump in a closed loop. The utility water is heated by a heat pump. Heat exchange from the utility water heats domestic hot water on demand, eliminating or reducing the need for domestic hot water storage tanks and storage of large quantities of water. In the present invention, fluctuations in condenser water temperature are dampened internally in a condenser water buffer and a control system.

A residential bathtub or shower is combined with a catch drain or basin below and in proximity with the tub or shower in a unitary structure. Most components of a heat pump are located in the catch basin. A hot water tank is outside of the catch basin but located in the immediate vicinity such as at an end of the tub or above the tub or alongside of the tub. The hot tank includes a heat exchanger that is the heat pump condenser, bringing heat to the hot tank for warming household water. Hot water flows from the tank into the tub or shower for bathing and then drains into the catch basin where heat exchangers remove heat before draining or reuse in flushing a toilet.

A residential bathtub or shower is combined with a catch drain or basin below and in proximity with the tub or shower in a unitary structure. Most components of a heat pump are located in the catch basin. A hot water tank is outside of the catch basin but located in the immediate vicinity such as at an end of the tub or above the tub or alongside of the tub. The hot tank includes a heat exchanger that is the heat pump condenser, bringing heat to the hot tank for warming household water. Hot water flows from the tank into the tub or shower for bathing and then drains into the catch basin where heat exchangers remove heat before draining or reuse in flushing a toilet.

A heat exchange system for transferring heat energy to control the temperature of a building comprising: a first heat exchanger having a first and second inlet and a first and second outlet wherein waste water flows through said first inlet of said first heat exchanger and out said first outlet while a water supply flows through said second inlet through said first heat exchanger and out said second outlet so as to transfer heat energy between said waste water and said water supply; and a second heat exchanger having a first and second inlet and a first and second outlet wherein domestic water flows through said first inlet, through said second heat exchanger and out said first outlet while said water supply from said second outlet of said first heat exchanger flows through said second inlet, through said second heat exchanger and out said second outlet so as to further transfer heat energy between said domestic water and said water supply from said second outlet of said second heat exchanger and control the temperature of said building.

A heat exchange system for transferring heat energy to control the temperature of a building comprising: a first heat exchanger having a first and second inlet and a first and second outlet wherein waste water flows through said first inlet of said first heat exchanger and out said first outlet while a water supply flows through said second inlet through said first heat exchanger and out said second outlet so as to transfer heat energy between said waste water and said water supply; and a second heat exchanger having a first and second inlet and a first and second outlet wherein domestic water flows through said first inlet, through said second heat exchanger and out said first outlet while said water supply from said second outlet of said first heat exchanger flows through said second inlet, through said second heat exchanger and out said second outlet so as to further transfer heat energy between said domestic water and said water supply from said second outlet of said second heat exchanger and control the temperature of said building.

A tempered hot water delivery system configured to prevent or reduce colonisation of Legionella bacteria in tempered water delivered from the system to one or more outlets in a facility. The system comprises: a thermostatic mixing valve comprising; a hot water inlet for connection to a supply of hot water at a temperature of at least 60° C., a cold water inlet for connection to a supply of cold water, a tempered water outlet for supplying tempered water obtained from mixing the supplied hot water and cold water to provide tempered water at a temperature of between 36° C. to about 53° C. to at least one tempered water outlet of a facility, a recirculating inlet for connection to a recirculating water line circuit; and a recirculating water line circuit comprising a circulating return line connected to a circulating return outlet from the facility and to a water inlet feed line for connection to an inlet of a water heater and storage tank for providing the supply of hot water, the recirculating water line circuit further comprising a thermostatic element configured to introduce hot water to the recirculating water line circuit to maintain the temperature of water in the recirculating water line circuit during periods of little or no draw-off.

Heat exchange system on a roof of a building, with an exchange volume comprising a substrate that is partly saturated by water and covered by a vegetated surface that enhances condensation and evapotranspiration and having a heat diffusion device comprising a circulation pump and a collection network for thermal exchanges with the exchange volume.

The disclosed technology includes a heat pump having a thermal energy storage (TES) material. The heat pump can include a first heat exchanger to exchange heat between ambient air and refrigerant, a second heat exchanger to exchange heat between the refrigerant and air supplied to a climate-controlled space, and a third heat exchanger to exchange heat between the TES material and the refrigerant in a first fluid path and the refrigerant in a second fluid path. The heat pump can include a first compressor to circulate refrigerant to the first, second, and third heat exchangers and a second compressor to circulate refrigerant to the second and third heat exchangers. The first compressor can facilitate heat exchange between the ambient air and the TES material and the second compressor can facilitate heat exchange between the TES material and the air supplied to the climate-controlled space.