A heat exchange system for transferring heat energy to control the temperature of a building, comprising a first heat exchanger for transferring thermal energy between waste water and a first water supply, a second heat exchanger connected to the first heat exchanger for transferring heat energy between the thermally treated first water supply and a second water supply, and a heat pump operatively arranged to supply the first water supply to the first heat exchanger, fluidly arranged between the building and the first heat exchanger, and fluidly arranged between the building and the second heat exchanger.

A free-standing Energy Recovery System enables sanitary recovery of thermal energy with heat transfer from hot waste effluent to incoming domestic water. The source of the effluent may, for example, be conventional commercial ware-washing, clothes washing equipment, pasteurization and other industrial processes.

A refrigeration cycle device includes a compressor, a heating radiator, a heat medium radiator, a decompressor, an evaporator, and a radiation amount adjuster. The heating radiator is configured to allow a high-pressure refrigerant to release heat to a heat exchange target fluid. The heat medium radiator is configured to allow the high-pressure refrigerant to release heat to a high-temperature side heat medium. The radiation amount adjuster is configured to adjust heat radiation amount radiated from the high-pressure refrigerant to the heat exchange target fluid at the heating radiator. In a heating mode, the radiation amount adjuster is configured to adjust the heat radiation amount at the heating radiator to be larger than a heat radiation amount at the heat medium radiator. In a cooling mode, the radiation amount adjuster is configured to adjust the heat radiation amount at the heating radiator to be lower than that in the heating mode.

An electric water heater with a computing device used to heat water from a residential or industrial water tank while executing useful computational tasks for a network. It includes a water tank, a heat exchanger, a computing device, a connectivity system to connect the computing device to a network, the network supplying computing tasks to the computing device, such that running the computing tasks results in a heat production, and a temperature control system to control the heat production from the computing device responsive to the water and heat exchanging fluid temperatures. The computational tasks are defined by one or more network user.

The present invention describes a water recirculation system intended for recycling of water or discarding of water not suitable to recycle, said water recirculation system (1) comprising a flow path for recirculation (50), at least one water treating unit (6), and a sensor unit (7) arranged for measurement of at least water quality, and wherein the sensor unit (7) is connected to a control unit which decides if water should be recycled or discarded in a point of separation (30) based on the measurement of the water quality, said water recirculation system (1) also comprises a first heating source (00), and wherein the water recirculation system (1) also comprises a second heating source (200).

The purpose of the present invention is to provide a hot water supplying apparatus which enables supply of hot water by utilizing waste heat of a pipe and a boiler as a heat source if there is a small quantity of residual hot water to use therefor, the residual hot water being required when using hot water of an instantaneous boiler, and a method for utilizing waste heat of a hot water supplying apparatus. The hot water supplying apparatus of the present invention for achieving said purpose comprises: a sensible heat exchanger for heating a heating fluid by means of combustion heat from a burner; a hot water supply heat exchanger for generating hot water by means of a heat exchange between the heating fluid heated by the sensible heat exchanger and direct water, and supplying the hot water to a faucet; and a pump for circulating the heating fluid via a heating fluid flow path which connects the sensible heat exchanger and the hot water supply heat exchanger, wherein the hot water supplying apparatus comprises: a signal reception unit for receiving a final hot water use signal; and a control unit for stopping the operation of the burner on the basis of the signal received by the signal reception unit and controlling the pump to circulate the heating fluid.

A heating system including a water conductor, a valve configured to cooperate with a fluid moving device which together operable to selectively circulate a heat transfer fluid in at least one of a first fluid circuit and a second fluid circuit, a heat exchanger and a blower operable to supply a stream of fluid over the heat exchanger, wherein the heat exchanger is fluidly connected to the first fluid circuit, wherein the heat exchanger being disposed to transfer heat between the heat transfer fluid and the heat exchanger, a coil fluidly connected to the second fluid circuit, wherein the coil is configured to be disposed on a drainage tube to transfer heat between the heat transfer fluid and the coil, a final heat exchanger configured for thermally coupling the first fluid circuit and the water conductor and the second fluid circuit and the water conductor.

A hot water returning system according to the present disclosure includes a hot water generator that generates hot water, a hot water line that supplies the hot water to a source of demand, a water returning line that returns the hot water to the hot water generator for preheating the hot water in the hot water line, a pump which pumps the hot water for returning of the hot water, and a processor electrically connected to the pump, and the processor is configured to determine a need for preheating corresponding to whether it is necessary to preheat the hot water and a status for use of hot water corresponding to whether the hot water is supplied to a source of demand, and control the pump based on the need for preheating and the status for use of hot water.

A sanitizing system for sanitizing a water flow at a point of use, the sanitizing system including an ozone demand indicator configured for determining the existence of a demand for ozone in the water flow; an ozone generator configured to be disposed no more than about 72 inches upstream of the point of use on a fluid conductor supplying the water flow at the point of use, wherein ozone generated by the ozone generator is configured to be disposed in the water flow to sanitize the water flow; and a control device operable to control the ozone demand indicator and the ozone generator responsive to the ozone demand indicator, wherein the control device is configured to cause the ozone generator to start generating ozone upon receiving an indication from the ozone demand indicator that the demand for ozone exists.

An apparatus that includes a refrigeration circuit that includes an evaporator, a first condenser and a compressor. The apparatus includes a refrigerant-water heat exchanger that includes a second condenser fluidly coupled to the refrigeration circuit. A control valve is operatively connected to the refrigeration circuit to direct flow of refrigerant through at least one of the first condenser during a dehumidification mode and the second condenser during a water heating mode. A damper is disposed on an upwind side of the evaporator, the damper being operable to reduce airflow across the evaporator during a ventilation mode.