4results about How to "Increase the temperature difference between supply and return water" 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 utility model discloses a large-temperature-difference central heating system with coupling complementation of a steam compression type heat pump and an absorption type heat pump. The large-temperature-difference central heating system is characterized by comprising a primary hot water pipe network, a secondary hot water pipe network, an absorption type heat pump unit, a first water source heat pump unit, a second water source heat pump unit, a heat storage water tank, a thermal power plant, a photovoltaic power generation and wind generating set and a user. The primary hot water pipe network comprises a primary water supply pipeline and a primary water return pipeline, and the secondary hot water pipe network comprises a secondary water supply pipeline and a secondary water return pipeline; the absorption heat pump unit, the first water source heat pump unit and the second water source heat pump unit are sequentially connected into a primary hot water pipe network in series, and heat is taken from the primary hot water pipe network. The absorption heat pump unit, the first water source heat pump unit and the second water source heat pump unit are connected into a secondary hot water pipe network in parallel, and heat is released to the secondary hot water pipe network and supplied to users; power generated by the thermal power plant is used for driving the first water source heat pump unit. The photovoltaic power generation and wind generating set is used for generating power to drive the second water source heat pump unit.

The application relates to a control system for intelligent pressure regulation of a district central cooling pipe network, and belongs to the technical field of central cooling, which comprises a cold station, a cold station control system, a plurality of plate exchanger rooms and a plurality of plate exchanger room control systems; the cold station control system comprises a first control module, and the plate exchanger room control system comprises a second control module connected with the first control module; the cold station comprises a variable frequency water pump connected with the first control module and a cold station water supply and return water pressure difference sensor, the variable frequency water pump is connected with the cooling pipe network; the plate exchanger room is connected with the cooling pipe network and a user end, a cooling side switch valve, a cooling side adjusting valve, a cooling side water supply temperature sensor and a cooling side return water temperature sensor connected with the second control module are arranged on a water supply pipe of the cooling pipe network side, a cooling side water supply temperature sensor connected with the second control module is arranged on a water supply pipe of the user end side, and the plate exchanger room is provided with a plate exchanger temperature sensor connected with the second control module, and the application has the effect of reducing the power consumption of the cooling variable frequency pump.

The invention discloses a cascade cooling magnetic suspension water chilling unit with a cold accumulation function, and relates to the technical field of air conditioner refrigeration. The water chilling unit comprises a water inlet pipeline, a water outlet pipeline, a plurality of water chilling unit assemblies and at least one cold storage tank. The water chilling unit assembly comprises a natural cooling assembly, an evaporator, a compressor communicated with the evaporator, a condenser communicated with the compressor and a first drying filter communicated with the condenser, and the first drying filter is communicated with the evaporator. The cascade cooling of the water system is realized by connecting the refrigerating systems in series, cold water with large temperature difference is prepared, the flow of the water system is reduced, and the conveying energy consumption of the system is further reduced; the cold storage tank is arranged on the water supply pipe, so that a natural cooling mode can be stably switched to a mechanical refrigeration mode; while energy is saved and consumption is reduced, the running reliability of the unit is improved, and the method is more suitable for wide application scenes.