4results about How to "Lower return water temperature" patented technology

The invention relates to the technical field of central heating and industrial heat energy utilization, in particular to a mixed water heat exchanger control system and a control method thereof.The mixed water heat exchanger control system comprises a jet type mixed water heat exchanger, a first high-temperature water jet channel, a second low-temperature water jet channel and a mixing cavity are formed in the jet type mixed water heat exchanger; the primary net adjusting unit comprises an electric adjusting valve and a pressure sensor which are arranged at a primary high-temperature water inlet; the secondary network circulating unit comprises a circulating pump, a flow sensor and a return water temperature sensor; the temperature detection unit at least comprises a mixed outlet water temperature sensor; the controller is in signal connection with the electric adjusting valve, the circulating pump and the sensors; synchronous efficient utilization of primary network heat energy and pressure energy is achieved, the heat exchange efficiency can be close to 100%, secondary low-temperature water can be effectively driven by the pressure energy of primary high-temperature water to participate in mixing through the injection pressurization characteristic of the injection type water mixing heat exchanger, and the operation power of a secondary network circulating pump is reduced.

The application discloses a composite cooling system which comprises a heat exchanger and a refrigeration system. The composite cooling system comprises the heat exchanger for exchanging cold and heat energy and the refrigeration system connected with the heat exchanger for forming a main refrigeration cycle and a secondary refrigeration cycle. The refrigeration system comprises at least one expansion valve. By controlling the expansion valve, the cold energy generated by the main refrigeration cycle can be used to perform secondary heat dissipation on a high-heat-source through the heat exchanger, and the secondary refrigeration cycle can be used to dissipate heat of other heat sources. The heat exchanger has a cold end inlet, a cold end outlet, a hot end inlet and a hot end outlet. The cold end inlet and the cold end outlet are in communication. The hot end inlet and the hot end outlet are in communication and are not in communication with the cold end inlet and the cold end outlet. The refrigeration system comprises an expansion valve, a heat dissipation unit and a compressor. The expansion valve is connected with the cold end inlet. The heat dissipation unit is connected with the expansion valve. The compressor is connected with the heat dissipation unit and the cold end outlet.

This invention discloses a boiler heating system with a return water heating function, relating to the field of boiler technology. The boiler heating system includes a boiler body, a steam chamber at the top of the boiler body, a circulating heating pipeline on one side of the steam chamber, a filter assembly, an expansion tank, and a thermostatic assembly on the circulating heating pipeline. The expansion tank includes a tank body and an expansion bag. The fixed end of the expansion bag is located on one side of the tank body, and the movable end of the expansion bag is provided with a stretching assembly. The fixed part of the stretching assembly is located on the other side of the tank body. A heat insulation plate is provided at the bottom of the tank body. This invention uses the contraction of the stretching assembly to stretch and deform the expansion bag, increasing the heat exchange area between the expansion bag and the hot steam in the tank body. The high-frequency reciprocating movement of the stretching assembly's extension and retraction end disturbs the water in the expansion bag, accelerating the heat exchange between the hot steam and the return water in the expansion bag, reducing the heat exchange time of the low-temperature return water in the steam chamber, and improving the efficiency of circulating heating.

The application provides a method for realizing cold-heat balance combined supply by a water ring heat pump, and comprises the following steps: S1, system construction; S2, connecting a water ring heat pump unit, a water-cooled centralized cold source, a hot water tank, a refrigeration circulating pump group and a hot water circulating pump group to an upper computer; S3, measuring the water temperature in the hot water tank and the energy of the hot water side of the water ring heat pump unit; measuring the cooling capacity of the water-cooled centralized cold source and the energy of the refrigeration side of the water ring heat pump unit; S4, according to the measured energy and temperature, the upper computer switches the heat supply mode of the hot water side of the water ring heat pump unit to a circulating heating mode or an instant heating mode; and switches the refrigeration side of the water ring heat pump unit to a summer mode or a winter mode. The method realizes air conditioning refrigeration heat recovery, realizes energy cascade utilization, solves the cold-heat combined supply problem, directly produces refrigeration water while producing heat, can be connected to a refrigeration water supply pipeline to eliminate cold load, realizes cold-heat balance and cold-heat coupled operation by adopting cold-heat combined supply, and realizes automatic control and energy-saving operation of the system.