Provided is an air pressure regulating device comprising an expansion tank having air stored therein and having an air injection/discharge port at an outside thereof; and a pressure regulation unit provided with a three-way ball valve connected to the air injection/discharge port, a pressure gauge which is installed in any one of flow paths of the three-way ball valve to check an internal pressure of the expansion tank, and a valve core which is installed in a flow path other than the flow path in which the pressure gauge is installed to be capable of injecting or discharging air into or from the expansion tank so as to be capable of controlling the internal pressure of the expansion tank.

A subatmospheric heating system refers to the field of heat power, namely energy-saving technologies and is designed for autonomous heating of residential, public, industrial buildings and greenhouses, livestock farms, etc.

For highly efficient transfer of heat flow from the heat energy source, a vacuum-steam method of heat transfer is used in an environment with adjustable depth of dilution with separate condensate return and vacuuming devices, with the possibility of mounting the heat point in either the basement, floor and roof variants. The reliability of the system is ensured by its safe and uninterrupted operation, and in the case of an unsatisfactory level of airtightness of the system (to eliminate leakages).

The energy efficiency of a subatmospheric heating system is achieved by a high rate of heat transfer and a minimum consumption of electricity by periodically operating pumps, while the efficiency of the system is 88% with energy savings of up to 40%

A subatmospheric heating system refers to the field of heat power, namely energy-saving technologies and is designed for autonomous heating of residential, public, industrial buildings and greenhouses, livestock farms, etc.

For highly efficient transfer of heat flow from the heat energy source, a vacuum-steam method of heat transfer is used in an environment with adjustable depth of dilution with separate condensate return and vacuuming devices, with the possibility of mounting the heat point in either the basement, floor and roof variants. The reliability of the system is ensured by its safe and uninterrupted operation, and in the case of an unsatisfactory level of airtightness of the system (to eliminate leakages).

The energy efficiency of a subatmospheric heating system is achieved by a high rate of heat transfer and a minimum consumption of electricity by periodically operating pumps, while the efficiency of the system is 88% with energy savings of up to 40%

A dual fluid heat exchange system is presented that provides a stable output temperature for a heated fluid while minimizing the output temperature of a cooled fluid. The heated and cooled fluids are brought into thermal contact with each other within a tank. The output temperature of the warmed fluid is maintained at a stable temperature by a re-circulation loop that connects directly to the mid portion of the tank such that the re-circulated fluid flow primarily warms only a re-circulation section of the tank. The other, lower flow rate, section of the tank may be positioned so that it has a cooler temperature and thus serves to increase the efficiency of the heat exchange by extracting extra heat energy out of the cooled fluid before it leaves the tank. Alternatively, the low flow rate section of the tank may be warmer than the re-circulated section, and thus allow the re-circulated section to be cooler than the output temperature of the warmed fluid.

The vacuum steam heating system relates to the field of heat power, and specifically to energy saving technologies and is intended for autonomous heating of residential, public, industrial buildings and greenhouses, livestock farms, etc. In order to achieve the high-efficiency transfer of a thermal flow from a source of thermal energy, a vacuum steam method of heat transfer is used in conjunction of a closed evaporation-condensation cycle having a high rate of molar heat transfer via steam, with separate subsystems of condensate return and vacuum-creation and rarification control within the system, with the possibility of installing a heat supply point in a basement variant, floor-mounted variant and roof variant. The system reliability is achieved via the safe and uninterrupted operation, including in the presence of unsatisfactory levels of the system air-tightness (prior to eliminating leaks). The system efficiency reaches 89%, with 38% energy-carrier conservation.

A water supply structure of a liquid cooling device, a pump and a liquid cooling device having the water supply structure are disclosed. The water supply structure, disposed on the cooling device or on the pump, includes a lower lid, an upper lid, and a pressure control member. An outlet is in the lower lid and communicates with the cooling device or with the pump. The upper lid is combined on the lower lid. A chamber, formed between the lower lid and the upper lid, communicates with the outlet and accommodates a coolant. The pressure control member is moveable in the chamber and includes a piston and an elastic part controlling the piston to move inside the chamber. The elastic part pushes against the piston to move inside the chamber such that the coolant is injected into the cooling device until hydraulic pressure equilibrium is achieved.

A water supply structure of a liquid cooling device, a pump and a liquid cooling device having the water supply structure are disclosed. The water supply structure, disposed on the cooling device or on the pump, includes a lower lid, an upper lid, and a pressure control member. An outlet is in the lower lid and communicates with the cooling device or with the pump. The upper lid is combined on the lower lid. A chamber, formed between the lower lid and the upper lid, communicates with the outlet and accommodates a coolant. The pressure control member is moveable in the chamber and includes a piston and an elastic part controlling the piston to move inside the chamber. The elastic part pushes against the piston to move inside the chamber such that the coolant is injected into the cooling device until hydraulic pressure equilibrium is achieved.

A closed loop heating system for heating air of a given space includes a vacuum pump, a boiler, a heat exchanger, a blower, and a piping network. The vacuum pump maintains a low pressure in the piping network. The boiler is in fluid communication with the vacuum pump via the pumping network for heating a working fluid. The boiler heats the working fluid to a heated vapor. The heat exchanger is in fluid communication with the boiler for receiving the heated vapor via the piping network. The blower is positioned proximal to the heat exchanger for receiving air from the given space. The blower blows the received air over the heat exchanger for heating the air of the given space.

A closed loop heating system for heating air of a given space includes a vacuum pump, a boiler, a heat exchanger, a blower, and a piping network. The vacuum pump maintains a low pressure in the piping network. The boiler is in fluid communication with the vacuum pump via the pumping network for heating a working fluid. The boiler heats the working fluid to a heated vapor. The heat exchanger is in fluid communication with the boiler for receiving the heated vapor via the piping network. The blower is positioned proximal to the heat exchanger for receiving air from the given space. The blower blows the received air over the heat exchanger for heating the air of the given space.