An instant hot water delivery system includes a thermal storage bin that receives hot water from a water heater via a hot water supply conduit and stores the hot water therein. The thermal storage bin is disposed adjacent a point of demand to deliver the hot water instantly to the point of demand responsive to a demand. The thermal storage bin is configured to retain a thermal energy of the hot water for a prolonged period using a phase change material. When the hot water stored in the thermal storage bin cools down below a threshold temperature, the cooled down hot water is recirculated to the water heater via a cold water supply conduit using a crossover valve. The recirculation is based on thermosiphon. Fresh hot water from the water heater replaces the cooled down hot water that is displaced from the thermal storage bin.

A greenhouse, for cold weather climates, is configured with a gable that is offset toward the north wall and therefore the south extension of the roof, from the gable to the south wall is longer than the north extension. A greater amount of light can enter through this south extension and the inside surface of the north wall is configured with a reflective surface to allow light to be more uniformly distributed around the plants. The north wall may have no widows and may be thermally insulated to prevent the greenhouse from getting too cold during the night. A ground to air heat transfer (GAHT) system may be configured to produce a flow of greenhouse air under the greenhouse for heat transfer, to moderate the temperature of the greenhouse. A thermal medium may flow to a thermal reservoir for heat exchange with the conduits of the GAHT system.

A heating system for heating a fluid received at an inlet, the system including a first heating device disposed in a first heated line branched from the inlet, wherein a first flow of the fluid through the first heated line is configured to be modulated by a first valve; a second heating device disposed in a second heated line branched from the inlet, wherein a second flow of the fluid through the second heated line is configured to be modulated by a second valve; and a bypass line and a third valve disposed in the bypass line, wherein a flow through the bypass line is configured to be modulated by the third valve, wherein the first and second heating devices and the first, second and third valve are configured to cooperate to heat the fluid at an outlet received from the first and second heated line and the bypass line.

The present invention provides an energy storage system (10) for a use with a boiler (20). The energy storage system (10) comprises a plurality of thermal energy storage banks (101, 102, 103, 104). Each thermal energy storage bank (101, 102, 103, 104) comprises phase changeable material having a predetermined phase transformation temperature. The energy storage system (10) also includes an extraction device (105; 1 15) configured to recover waste energy from the boiler (20). The extraction device (105, 1 15) is operable to extract waste energy from the boiler (20) and feed that energy to at least one (101) of the thermal energy storage banks (101, 102, 103, 104). A controller (106) is arranged, in use, to activate the extraction device (105, 115) in response to operation of the boiler (20).

A domestic water heating group includes a heat source; storage tank. A heat exchanger includes inlet and outlet sections, the the inlet and outlet being in fluid communication with: a water supply system, a water usage system and the tank. The water is heated to, towards the tank, a storage temperature TAC and/or towards the usage system at a supply temperature TER, mixer group is upstream of the inlet of the exchanger group and has first and second inlet ports connected to the supply system, tank, exchanger group The mixer receives the domestic water, at a low temperature TIN, the heated domestic water at the second inlet port, and mixes the water thus received and provides at the outlet port, in fluid connection with the exchanger group, the mixed domestic water having an intermediate temperature TINT included between the temperature TIN and the temperature TAC.

A system for heating a first fluid flow from a first temperature to a second temperature, the system including a hot water supply line for receiving the first fluid flow at a first end and exhausting the first fluid flow at a second end; and a heating system including a heat engine, a thermal battery and a heat exchanger, wherein the thermal battery is configured to be replenished at a point of heat transfer by the heat engine and the hot water supply line is configured to receive heat from the thermal battery via the heat exchanger to elevate the temperature of the first fluid flow from the first temperature to the second temperature.

A hybrid photovoltaic and radiant heating and cooling device is provided, wherein the device comprises a photovoltaic panel; a radiant heating and cooling panel; a first heat-exchanging pipe in direct contact with a back surface of the photovoltaic panel; a second heat-exchanging pipe in direct contact with a back surface of the radiant heating and cooling panel; and a thermal storage tank fluidly connecting the first and the second heat-exchanging pipes, wherein the tank is arranged between the first and second heat-exchanging pipes.

An energy transfer system that includes a tank comprising an outer wall having a circumference. A first fluid pathway surrounds a portion of the circumference of the tank. A second fluid pathway seals the portion of the circumference of the tank and the first fluid pathway from the environment.

The present invention relates to a heat transmitting system for providing a heat medium with a set temperature, characterized in that a heat transmitting system may include: a heat source; a heat source; a plurality of heat storage tanks that stores heat media heated by the heat source respectively; a heat exchanger that is transmitted with heat from the heat media stored in the heat storage tanks; a heat source pump that transmits the heat media transmitted from the heat source to the heat storage tanks; an inlet side-heat source header that is connected with respective inlet ends of the plurality of heat storage tanks; a heat source header valve that is provided between the inlet side-heat source header and the respective inlet ends of the plurality of heat storage tanks; an outlet side-heat source header that is connected with respective outlet ends of plurality of the heat storage tanks; an outlet valve of heat storage tank that is provided to respective outlet ends of plurality of the heat storage tanks; a header outlet valve that is provided between the heat source and the outlet side-heat source header; a heat transmitting line that is connected between the outlet side-heat source header and an inlet end of the heat exchanger, thus transmitting the heat medium to the heat exchanger; and a heat transmitting pump that is provided to one side of a exchanger outlet line connecting the heat transmitting line or the heat exchanger and the inlet side-heat source header.

The present invention provides a cold-storage instantaneous heat pump water heater (HPWH). The HPWH includes a cold-water tank, a main evaporator, a compressor, and a hot water heat exchanger. In the present invention, heat of a working medium in the cold-water tank is absorbed by the main evaporator, and bathing water is rapidly heated by the hot water heat exchanger (condenser of the heat pump), thereby realizing instant heating with small input electrical power. Cold-water tank replaces the hot water tank of conventional HPWH avoiding energy loss during hot water storage. The working medium in the cold-water tank absorbs heat from the environment, to further improve energy utilization. In addition, there are three energy recovery evaporators to recover the waste heat of bathing.