36results about How to "Reduce pump consumption" patented technology

The invention relates to a novel electrode frame for an all-vanadium redox flow battery pile, which improves the utilization rate of membrane materials compared with the traditional battery pile and can not need perforation. The improvement of the utilization rate of the membrane materials leads the cost of the battery pile to be lowered, the membrane materials lead the assembly difficulty of the battery pile to be reduced without perforation, and the stability of the battery pile is improved after the battery pile is operated for a long time, thereby ensuring the further engineering magnification and the assembly of the battery pile with larger power.

The invention relates to a gas-steam circulation heating-electricity-cooling combined supply system and a gas-steam circulation heating-electricity-cooling combined supply method for a thermal power plant with zero energy loss rate and belongs to the technical field of gas-steam combined circulation heating-electricity-cooling combined supply. The gas-steam circulation heating-electricity-coolingcombined supply system comprises a heat-electricity combined circulation part, a large temperature difference adsorption waste steam recovery heat pump, a large temperature difference adsorption fluegas recovery heat pump, a flue gas condensation recovery acquisition device, an initial station steam-water heat exchanger, an adsorption heat pump / refrigeration all-in-one machine and the like, wherein the heat-electricity combined circulation part consists of a burning machine, a waste heat boiler, a steam turbine, a generator and the like. An operation regulating method for carrying out combination energy optimization on an integral thermal system, which is based on an adsorption heat-exchange waste heat recovery and large temperature difference heat supply technology and combines a climate compensation technology, is adopted, so that aiming at the characteristics of a gas-steam combined circulation system, the effect that the energy utilization efficiency for once of the thermal powerplant is close to, even exceeds 100 percent is realized. In the invention, energy resources at each energy grade are utilized to drive generating equipment, heating equipment and air-conditioning cold supply equipment, so that the energy-saving effect that compared with a flue gas low heating value, the effective energy output has no energy loss is achieved.

The invention discloses a cooling mode driven by utilizing an urban heat supply network, which belongs to the technical field of cooling modes. In the mode, hot water of the heat supply network is utilized to drive an absorption refrigerator and a solution dehumidifier to cool and dehumidify the place of a user; meanwhile, the water of the heat supply network after driving the cooling and the dehumidification can be used for preheating domestic hot water and further recharging the heat to the underground through a buried pipe so as to gradually reduce the backwater temperature of the heat supply network, and the heat recharged to the underground can be extracted for heat supply in winter. In a power plant, a mode of the combination heating of a condenser, a steam absorption heat pump and a steam-water heat exchanger is adopted to realize the gradual heating of the backwater of the heat supply network. Compared with the conventional distributed cooling mode and centralized cold water supply mode, the mode can utilize spare urban heat supply network resource in a refrigeration season, increase the heat load of a thermal power plant, recycle the waste heat of the circulating water of the power plant, and facilitate cutting down a power peak due to air conditioning load and even saving power.

The invention relates to a regional heating, cooling and power combined energy system and method based on absorption heat exchange. The system comprises four parts of equipment and is formed by connecting energy transmission and distribution networks formed by pipes with various water pumps and valves; the four parts of equipment are respectively a heat and power plant steam turbine power generation circulation sub system, an absorption dead steam afterheat recycling sub system, an absorption heat exchanging station / energy center and a distributed or semi-centralized air conditioner water heating sub system, wherein the heat and power plant steam turbine power generation circulation sub system is arranged on a thermal power plant and used for generating power and supplying heat; the absorption dead steam afterheat recycling sub system is arranged at an initial station of the thermal power plant and used for increasing the heat supplying and power generating efficiency by using the afterheat; the absorption heat exchanging station / energy center is arranged in a secondary network thermal substation and cold supply station; and the distributed or semi-centralized air conditioner water heating sub system is arranged at the user building and provided to the heat supply / air conditioner user. The method comprises three parts of operation regulation in a heating stage in winter, operation regulation in a cold supply stage in summer and operation regulation in a transitional stage beyond the two stages. According to the invention, the comprehensive energy utilization efficiency of a thermodynamic system can be effectively improved.

The invention discloses a parallel heat exchanger melting ice cold accumulation device, comprising refrigerating unit and heat exchanger connected as a loop and heat exchanger adjusting valve, secondary refrigerant and refrigerator adjusting valve set on the pipelines of heat exchanger outlet and refrigerating unit inlet; an ice tank pipeline connected to the pipeline between secondary refrigerant pump and refrigerator adjusting valve, with ice tank adjusting valve and ice tank set orderly on it, and its another end connected to the pipeline between refrigerating unit outlet and exchanger melting inlet; bypass line connected to the pipeline between heat exchanger adjusting valve and secondary refrigerant pump, with a bypass adjusting valve set on it and another end connected to the pipeline between ice tank adjusting valve and ice tank. The device which maintains the advantages of original parallel heat exchanger system can realize five operating modes of cold accumulation, ice tank supplying ice, refrigerator supplying refrigeration, ice tank and refrigerator unifying supplying refrigeration and simultaneous accumulating and supplying, meanwhile has simplified control method of parallel heat exchanger system, increased its stability and decreased its cost.

The invention relates to a microfluidic module for large-scale preparation of liquid drops. A multi-stage modular amplification strategy is adopted; the module design comprises two parallel and stacked amplification processes; a plurality of modules operate in an integrated manner to realize an industrial production demand; N is the number of parallel channels in each chip group; M is the number of stacked chips of each module; the whole module comprises N * M channels; if Q is the number of integrated modules, the total yield is P= eta x (N * M * Q), and is respectively in positive correlation with N, M and Q; eta is the yield of the single channel. In actual application, three parameters can be reasonably weighed according to the demand for space utilization and yield, feature parameters of an obtained product and the like so as to achieve the optimal effect. The application of the microfluidic module for the large-scale preparation of the liquid drops or a microfluidic system based on the module realizes the large-scale production of the liquid drops or emulsion; when serving as a template, the microfluidic module can synthesize a functional particle material; the microfluidic module is widely applied to the field of biological medicines, chemistry and chemical engineering, material preparation and the like.

The invention discloses a medium-high temperature solar steam-absorption refrigeration-seawater desalination-energy storage coupling system. The system takes heat-conducting oil and water / steam as heat-transfer fluid, and takes phase transition metal and water steam as heat storage media. The system comprises a solar collector system, a heat transfer working medium circulating system, an absorption refrigeration system and a seawater desalination system, and comprises a parabolic groove-type optical collector (1), a phase transition metal energy storage tank (2), a heat conducting oil-steam generator (3), an oil source absorption refrigeration unit (4), an oil source seawater desalination unit (5), a high-temperature oil pump (6), an electric three-way adjustment valve (7), a steam heat storage device (8), a steam source absorption refrigeration unit (9), a steam source absorption refrigeration unit (10), a water treating device (12), a Fresnel plane reflecting mirror (13), an energy-storage absorber (14), a cooling medium inlet valve (16), a cooling medium outlet valve (15), a fresh water outlet valve (18), a seawater inlet valve (19) and the like. By the system, high-temperature heat-conducting oil and steam can be acquired; and the system is suitable for the coupling of large-scale seawater desalination and absorption refrigeration.

The process of preparing nanometer capsule phase change material emulsion includes adding the oil phase liquid compounded with olefin monomer, hydrophilic monomer, alkane, initiator and n-lauryl mercaptan into the mixed liquid of emulsifier and deionized water via stirring and ultrasonic dispersing to obtain micro emulsion, introducing nitrogen to the micro emulsion system to eliminate oxygen via stirring, reflux condensing, heating to 65 deg.c and constant temperature polymerization reaction for 5 hr, and cooling naturally to room temperature to obtain the nanometer capsule phase change material emulsion. Thus prepared nanometer capsule phase change material emulsion has nanometer size, stable performance, great phase change enthalpy and wide application in latent heat functional hot fluid, heat accumulating and temperature regulating fabric, energy saving building wall and other fields.

The invention relates to a device for synchronously recycling water potential energy of a central air conditioning system. More than two paths of heat exchanging pipelines are connected in parallel between more than two water outlets of a water segregator and more than two water inlets of a water collector; a circulating water pump is arranged on each path of heat exchanging pipeline; more than two tail end air conditioners are connected in parallel to each path of heat exchanging pipeline; a water supply pipe is connected with the water inlets of the water segregator; the water outlet of the water collector is connected with a water return pipe; a driving water turbine and a driven water turbine which are connected with each other through a shaft coupling are arranged on the water return pipe and the water supply pipe respectively; the blade inclination direction of an impeller of the driving water turbine is opposite to that of an impeller of the driven water turbine; an electric regulating valve and a temperature sensor are arranged on a water outlet side, on which the water return pipe is positioned, of the driving water turbine; and the electric regulating valve and the temperature sensor are connected with a controller. Energy can be complemented for water supply by using recycled high-position water potential energy, so that energy of the air conditioning system is saved and investment on the central air conditioning system is reduced.

The invention provides a novel heat supply system. The novel heat supply system comprises a heat supply pipe network composed of a heat supply primary pipe network and a heat supply secondary pipe network. A water turbine is arranged on a water supply pipeline of the heat supply primary pipe network and is connected with the a supplement circulating water pump on a water supply pipeline of the heat supply secondary pipe network through a coupler transmission device. A main circulating water pump is further arranged on the water supply pipeline of the heat supply secondary pipe network. An electric adjusting valve is arranged between the main circulating water pump and the supplement circulating water pump. The coupler transmission device, the supplement circulating water pump, the electricadjusting valve and the main circulating water pump are electrically connected with a speed adjusting controller. A user heat exchange station is arranged among the water supply pipelines and water return pipelines of the heat supply primary pipe network and the heat supply secondary pipe network. According to the novel heat supply system, an available pressure head of the primary pipe network inthe heat supply pipe network system is effectively eliminated, an effective coupling system is formed by the primary pipe network and the secondary pipe network of the heat supply pipe network, a control center is additionally mounted, and therefore heat is distributed according to needs, and electric consumption of the circulating pump of the secondary pipe network is reduced.

The invention provides a vanadium battery negative electrolyte and a method for reducing viscosity of the vanadium battery negative electrolyte. The vanadium battery negative electrolyte contains vanadium ions, sulfuric acid and water, wherein the vanadium ions are divalent and / or trivalent vanadium ions; the vanadium battery negative electrolyte further comprises an additive, wherein the additive contains functional groups -NH2 and / or -COOH, and concentration of the additive is 0.05%-5% of that of the vanadium ions in the vanadium battery negative electrolyte. The method comprises the step that the additive is added to the vanadium battery negative electrolyte. The additive is added to the vanadium battery negative electrolyte, so that the viscosity of the vanadium battery negative electrolyte can be obviously reduced, and electrochemical activity of the electrolyte can be improved; with the application of the electrolyte to the vanadium battery, charge-discharge performance can be effectively improved, and pump consumption during circular flowing of the electrolyte is reduced.

The process of preparing nanometer capsule phase change material emulsion includes adding the oil phase liquid compounded with olefin monomer, hydrophilic monomer, alkane, initiator and n-lauryl mercaptan into the mixed liquid of emulsifier and deionized water via stirring and ultrasonic dispersing to obtain micro emulsion, introducing nitrogen to the micro emulsion system to eliminate oxygen viastirring, reflux condensing, heating to 65 deg.c and constant temperature polymerization reaction for 5 hr, and cooling naturally to room temperature to obtain the nanometer capsule phase change material emulsion. Thus prepared nanometer capsule phase change material emulsion has nanometer size, stable performance, great phase change enthalpy and wide application in latent heat functional hot fluid, heat accumulating and temperature regulating fabric, energy saving building wall and other fields.

The invention discloses a spiral-wound membrane static-state mixed flow filtering net. The spiral-wound membrane static-state mixed flow filtering net is composed of a plurality of filtering net strips and is fixed by a filtering net frame, and the filtering net strips are uniformly distributed at the same distance in a feeding direction, each filtering net strip is composed of a plurality of filtering net units, each filtering net unit is provided with three fluid passages perpendicular to the feeding fluid direction, fluid is statically mixed in the filtering net unit, no vortex and turbulent flow are caused, and no fluid dead angle is generated when the fluid passes through the filtering net. According to the spiral-wound membrane static-state mixed flow filtering net, fluid near the surface of the membrane and at the center of the fluid passage is inter-migrated, the fluid mechanical condition of the surface of the membrane is changed, no vortex and turbulent flow are generated, the above technical scheme is different from the various existing schemes, the surface concentration of the substance intercepted by the membrane can be reduced, the mass transfer rate is increased, the fluid mixing effect is improved, while the concentration polarization and the membrane pollution can be effectively reduced, the increased pressure drop and the pumping loss during membrane operation due to the arrangement of the filtering net can be reduced, and the energy utilization rate is improved.

The invention provides an intelligent fluid pump group. The intelligent fluid pump group comprises an H steel frame, and at least two intelligent variable-frequency pumps are installed at the bottom of the H steel frame; water inlets of the intelligent variable-frequency pumps are connected with suction fluid directors, and the suction fluid directors are connected with a first water collection pipe installed at the top end of the H steel frame through first vertical pipes; and water outlets of the intelligent variable-frequency pumps are connected with connecting pipes, the connecting pipes are connected with multifunctional valves, and the multifunctional valves are connected with a second water collection pipe installed at the top end of the H steel frame through second vertical pipes.According to the intelligent fluid pump group, noise and vibration are low in the running process, the occupied area and space are small, the intelligent fluid pump group does not need to depend on anexternal sensor, and therefore the pumping efficiency is improved to the maximum limit; and the concentricity of the intelligent variable-frequency pumps is high, pump shafts and motor shafts are positioned by adopting machining connecting steel frames and connected through rigid couplers, impellers achieve dynamic balance design, and flow channels achieve optimization design.

The invention discloses a static mixed flow separating screen for a spiral-wound membrane. The screen is composed of a plurality of separating screen strips which are fixed through a separating screen strip frame and uniformly distributed in the feeding direction at equal intervals. Each separating screen strip is composed of a plurality of separating screen units. Each separating screen unit is provided with three fluid channels perpendicular to the fluid inlet direction. Fluid carries out static flow mixing in the separating screen units and does not generate vortexes or turbulence, and fluid dead space does not exist when the fluid flows through the separating screen. According to the static mixed flow separating screen for the spiral-wound membrane, the fluid close to the surface of the membrane and the fluid in the centers of the fluid channels can be transferred mutually, the mechanical condition of the fluid on the surface of the membrane is changed, the vortexes and the turbulence are avoided, the separating screen is different from various existing schemes, the surface concentration of materials held back by the membrane is reduced, the mass transfer rate is increased, and fluid mixing is strengthened; moreover, pressure drop and pump consumption increased in the operating process of the membrane due to adding of the separating screen are reduced while concentration polarization and membrane pollution are effectively reduced, and the energy utilization ratio is increased.

The invention relates to the technical field of air conditioner control, in particular to a large-temperature-difference air conditioner water transmission and distribution system based on a water mixing pump and a control method thereof. The system comprises a control unit, a water mixing pump, a regulating valve, a water mixing thermometer and a water return thermometer; a water return pipe is communicated with a user water inlet pipe through a water mixing pipe; the water mixing pump is arranged on the water mixing pipe, and the water mixing thermometer and the regulating valve are sequentially arranged between an outlet of the water mixing pump and a water inlet of an end user; the return water thermometer is arranged between a water outlet of the end user and an inlet of the water mixing pump; data output ends of the water mixing thermometer and the return water thermometer are connected with a data input end of the control unit; and a control signal output end of the control unit is connected with control signal input ends of the water mixing pump and the regulating valve. The relation that energy station water supply and return parameters in an air conditioner water system of an energy station direct supply tail end need to be consistent with user tail end energy consumption parameters is decoupled, the water supply and return temperature difference is increased, the system circulating water amount is reduced, conveying pump consumption is effectively reduced, and a temperature value is kept stable.

The invention provides a geothermal well group intelligent recharge control system and method. The geothermal well group intelligent recharge control system comprises a plurality of geothermal wells,a water collector, a plate heat exchanger, a water segregator and a heat pump host machine, wherein each geothermal well is internally provided with a water intake pump; the water outlet ends of the plurality of water intake pumps are respectively communicated with the water inlet end of the water collector through pipelines; the water outlet end of the water collector is communicated with the water inlet end of the water segregator through the plate heat exchanger; the plate heat exchanger is connected with the heat pump host machine; a plurality of recharge pumps are arranged at the water outlet end of the water segregator; the recharge pumps are in one-to-one correspondence with the geothermal wells; a balance pipe is arranged between the water segregator and the water collector; the water outlet end of each recharge pump is communicated with the corresponding geothermal well through a pipeline; a first flow meter and a conductivity meter are arranged at the water outlet end of eachwater intake pump; a pressure gauge and a second flow meter are arranged at the water outlet end of each recharge pump; and a third flow meter is arranged on the balance pipe.

The invention relates to a regional heating, cooling and power combined energy system and method based on absorption heat exchange. The system comprises four parts of equipment and is formed by connecting energy transmission and distribution networks formed by pipes with various water pumps and valves; the four parts of equipment are respectively a heat and power plant steam turbine power generation circulation sub system, an absorption dead steam afterheat recycling sub system, an absorption heat exchanging station / energy center and a distributed or semi-centralized air conditioner water heating sub system, wherein the heat and power plant steam turbine power generation circulation sub system is arranged on a thermal power plant and used for generating power and supplying heat; the absorption dead steam afterheat recycling sub system is arranged at an initial station of the thermal power plant and used for increasing the heat supplying and power generating efficiency by using the afterheat; the absorption heat exchanging station / energy center is arranged in a secondary network thermal substation and cold supply station; and the distributed or semi-centralized air conditioner water heating sub system is arranged at the user building and provided to the heat supply / air conditioner user. The method comprises three parts of operation regulation in a heating stage in winter, operation regulation in a cold supply stage in summer and operation regulation in a transitional stage beyond the two stages. According to the invention, the comprehensive energy utilization efficiency of a thermodynamic system can be effectively improved.

The invention discloses a ship waste gas washing device which is composed of a washing tower, a washing liquid supply and discharge system and a ship waste gas cooling system, a ship waste gas outlet is formed in the top of the washing tower, and a spraying layer washing area, a packing layer washing area and a ship waste gas cooling area are sequentially arranged in the washing tower from top to bottom. A supply part of the washing liquid supply and discharge system provides washing liquid for the spraying layer washing area, a discharge part of the washing liquid supply and discharge system discharges washing wastewater, and the ship waste gas cooling system is provided with a ship waste gas inlet; ship waste gas introduced from the ship waste gas inlet is cooled by cooling liquid provided by the ship waste gas cooling system, enters the ship waste gas cooling area and then flows back from bottom to top; meanwhile, washing liquid provided by the supply part of the washing liquid supply and discharge system uniformly passes through the spraying layer washing area and the packing layer washing area in sequence to be in contact with ship waste gas flowing reversely from bottom to top to wash the ship waste gas, and the washed ship waste gas is discharged through a ship waste gas outlet; the invention has the advantage that low-resistance, low-consumption and high-efficiency washing can be realized.

The invention relates to a gas-steam circulation heating-electricity-cooling combined supply system and a gas-steam circulation heating-electricity-cooling combined supply method for a thermal power plant with zero energy loss rate and belongs to the technical field of gas-steam combined circulation heating-electricity-cooling combined supply. The gas-steam circulation heating-electricity-coolingcombined supply system comprises a heat-electricity combined circulation part, a large temperature difference adsorption waste steam recovery heat pump, a large temperature difference adsorption fluegas recovery heat pump, a flue gas condensation recovery acquisition device, an initial station steam-water heat exchanger, an adsorption heat pump / refrigeration all-in-one machine and the like, wherein the heat-electricity combined circulation part consists of a burning machine, a waste heat boiler, a steam turbine, a generator and the like. An operation regulating method for carrying out combination energy optimization on an integral thermal system, which is based on an adsorption heat-exchange waste heat recovery and large temperature difference heat supply technology and combines a climate compensation technology, is adopted, so that aiming at the characteristics of a gas-steam combined circulation system, the effect that the energy utilization efficiency for once of the thermal powerplant is close to, even exceeds 100 percent is realized. In the invention, energy resources at each energy grade are utilized to drive generating equipment, heating equipment and air-conditioning cold supply equipment, so that the energy-saving effect that compared with a flue gas low heating value, the effective energy output has no energy loss is achieved.

The invention relates to an operation method of a zinc-bromine single-flow battery. The zinc-bromine single-flow battery comprises a zinc-bromine single-flow single battery or an electric pile formed by connecting more than two single batteries in series; the method comprises the following steps: 1) after the zinc-bromine single flow battery is assembled and before the battery is charged and discharged for the first time, opening a positive electrode liquid outlet electric valve, a positive electrode liquid inlet electric valve, a negative electrode liquid outlet electric valve and a negative electrode liquid inlet electric valve, and circularly flowing electrolyte in the battery, so that an electrode is completely infiltrated by the electrolyte; 2) carrying out charging and discharging operation of the zinc-bromine single flow battery; in the charging process, the positive electrode liquid outlet electric valve and the positive electrode liquid inlet electric valve are always in a closed state, the negative electrode liquid outlet electric valve and the negative electrode liquid inlet electric valve are opened, and the circulating pump is started; in the discharging process, the positive electrode liquid outlet electric valve, the positive electrode liquid inlet electric valve, the negative electrode liquid outlet electric valve and the negative electrode liquid inlet electric valve are all in a closed state, and the circulating pump is closed. The battery performance and the voltage uniformity can be improved; and system pump consumption is reduced.

The invention provides a parallel loop mixed water heat exchange PID control system and its control method, including a controller connected through a signal line, a temperature acquisition module, a pressure difference acquisition module and an electric regulating valve control module, and the entire water circulation in the system includes One main line and two parallel branch lines form parallel water mixing parallel loop Ⅰ and parallel loop Ⅱ. The two parallel branch lines are equipped with separate cooling or heating equipment, temperature sensors and electric regulating valves, of which the parallel loop Road Ⅰ requires an energy loop for mixed water heat exchange, and parallel loop Ⅱ provides an energy loop for mixed water heat exchange. The main line of the water line is equipped with a mixing temperature sensor, a circulating water pump, and energy-consuming equipment. The electric control valves of the two parallel loops of the present invention are adjusted according to different adjustment targets, avoiding mutual interference and disorderly repeated adjustment when adjusting according to one adjustment target, so that there are fewer adjustment rounds, and the adjustment time is short and the adjustment accuracy is high. High, conducive to the advantages of control system programming.

The invention discloses a spiral-wound membrane static-state mixed flow filtering net. The spiral-wound membrane static-state mixed flow filtering net is composed of a plurality of filtering net strips and is fixed by a filtering net frame, and the filtering net strips are uniformly distributed at the same distance in a feeding direction, each filtering net strip is composed of a plurality of filtering net units, each filtering net unit is provided with three fluid passages perpendicular to the feeding fluid direction, fluid is statically mixed in the filtering net unit, no vortex and turbulent flow are caused, and no fluid dead angle is generated when the fluid passes through the filtering net. According to the spiral-wound membrane static-state mixed flow filtering net, fluid near the surface of the membrane and at the center of the fluid passage is inter-migrated, the fluid mechanical condition of the surface of the membrane is changed, no vortex and turbulent flow are generated, the above technical scheme is different from the various existing schemes, the surface concentration of the substance intercepted by the membrane can be reduced, the mass transfer rate is increased, the fluid mixing effect is improved, while the concentration polarization and the membrane pollution can be effectively reduced, the increased pressure drop and the pumping loss during membrane operation due to the arrangement of the filtering net can be reduced, and the energy utilization rate is improved.

A pile modularized structure of high power and redox liquid flow energy storage type is prepared as setting at least one subunit with at least two single cells on each sub-pile, sending electrolyte into each subunit liquid path by electrolyte conveying pump via each sub-pile liquid path and applying isometric bipartition mode on all liquid in and out points at electrolyte pipeline between different sub-piles and different subunits.

The invention relates to a novel electrode frame for an all-vanadium redox flow battery pile, which improves the utilization rate of membrane materials compared with the traditional battery pile and can not need perforation. The improvement of the utilization rate of the membrane materials leads the cost of the battery pile to be lowered, the membrane materials lead the assembly difficulty of thebattery pile to be reduced without perforation, and the stability of the battery pile is improved after the battery pile is operated for a long time, thereby ensuring the further engineering magnification and the assembly of the battery pile with larger power.

The invention discloses an absorption heat pump unit and a heat supply system for recovering waste heat from a low-temperature water source. The absorption heat pump unit (10) includes an evaporator (E), an absorber (A), a generator (G), a condenser (C) and a primary network water pipeline; the evaporator (E), the absorber (A), the generator The condenser (G) and the condenser (C) are sequentially connected through fluid pipelines to form a fluid closed circulation pipeline; the primary network water pipeline is connected to the heat exchange tube inside the absorber (A) to form a primary network water circulation pipeline. The absorption heat pump unit provided by the present invention is provided with a fluid closed circulation pipeline and a primary network water circulation pipeline, through which the fluid closed circulation pipeline heats the primary network water circulation pipeline, and the above absorption heat pump unit can make full use of the low High-grade heat energy saves resources while reducing heating costs and obtaining fresh water.

The invention discloses an engine cooling system based on phase change fluid / water. The engine cooling system comprises an engine and a cooling-water cooling system, wherein the cooling-water cooling system comprises a first pump, a first adjustment valve and a heat exchanger; the first pump is communicated with the first adjustment valve and the heat exchanger respectively; a cooling water inlet is formed in an engine body of the engine; a cooling cavity is formed between the engine body of the engine and a cylinder sleeve; the cooling water inlet is communicated with the cooling cavity; a cooling water outlet is formed in a cylinder cover of the engine; the first adjustment valve is communicated with the cooling water inlet; the cooling water outlet is communicated with the heat exchanger; the engine cooling system based on the phase change fluid / water is characterized by being provided with a phase change fluid cooling system; the phase change fluid cooling system comprises a second pump and a second adjustment valve; a spiral cooling pipe is fixedly arranged in the cooling cavity; the second pump is communicated with the second adjustment valve and the heat exchanger respectively; the second adjustment valve is communicated with an inlet of the cooling pipe; an outlet of the cooling pipe is communicated with the heat exchanger. The engine cooling system has the advantages that the circulating flow of a cooling medium is greatly reduced, pump consumption is reduced, and an energy-saving effect is achieved; meanwhile, the phase change fluid absorbs heat in the engine in a phase change latent heat manner; the temperature of the cylinder body of the engine is more uniform as the temperature region of a phase change material is narrower.