42results about How to "Lower water supply temperature" patented technology

The invention relates to an energy-saving control method for a self-adaptation frequency-conversion heat pump hot water heating system. The energy-saving control method is characterized by comprising the steps that a basic functional expression among a heat pump water supply calculating temperature, an indoor set temperature and an outdoor environment temperature is established, and the temperature difference between the heat pump water supply calculating temperature and an actual water return temperature is judged so that the heat pump water supply calculating temperature can be corrected; the heat pump water supply calculating temperature is corrected again on the basis of a first corrected functional expression according to the deviation between a stabilized actual room air temperature and a set indoor temperature; and the rotating speed of a compressor of a frequency-conversion heat pump water heater is adjusted according to the difference value between an actual water supply temperature and the heat pump water supply calculating temperature obtained through a second corrected functional expression, and therefore an actual water supply calculating temperature and the heat pump water supply calculating temperature tend to be consistent. The energy-saving control method has the beneficial effects that the heat preservation characteristics of different buildings and the differences of laying of hot water coils are taken into full consideration, the water supply calculating temperature is more accurate, and the energy-saving effect is also more obvious.

The present invention relates to a solar composite energy system based on solid adsorption refrigerating machine in the energy-saving field. Said system includes solar collection system, solar hot water supply system, solar floor heating system, solar air-conditioning system, solar natural ventilation system and control system.

The invention relates to a novel low-temperature combined cooling, heating and power (CCHP) system based on a heat pump. Currently, no novel low-temperature CCHP system based on the heat pump with a simple structure and a reasonable design exists. The novel low-temperature CCHP system based on the heat pump comprises a high-pressure steam pipe, a steam turbine, a power generator, a condenser and a boiler connecting pipe, and is characterized by also consisting of a heating low-pressure steam pipe, a heating condensate pipe, a power plant after-heat single-effect heat pump unit, a refrigeration single-effect absorbing heat pump unit, a heat pump unit loop pipe, a loop circulating pump, a user refrigeration pipe, a cooling tower, a cooling tower water inlet pipe, a cooling tower water outlet pipe, a cooling water circulating pump, a power plant circulating cooling water pipe, a heat pump cooling tower, a cooling tower circulating pipe, a heating single-effect absorbing heat pump unit, a heating heating pipe, a heat pump circulating pipe and a user heating pipe; the heating low-pressure steam pipe is connected with the refrigeration single-effect absorbing heat pump unit; and the heating condensate pipe is connected with the power plant after-heat single-effect heat pump unit. The novel low-temperature CCHP system based on the heat pump has the advantages of reasonable structural design, energy saving, environmental friendliness and high heat utilization rate.

The invention belongs to the technical field of thermoelectricity, and relates to a 300MW-capacity-level low vacuum heat supply steam turbine system and an adjusting method thereof. The system consists of a 300MW-capacity-level low vacuum heat supply steam turbine generator set and a power plant cold end and heat supply load coupling adjusting system. A steam turbine high-pressure cylinder, a steam turbine medium-pressure cylinder, a steam turbine low-pressure cylinder I, a steam turbine low-pressure cylinder II and a generator are uniaxially arranged in the steam turbine generator set. In the heating period, the back pressure of the two low-pressure cylinders rises, and a steam turbine set runs under low vacuum; steam is uniformly divided into two strands when entering a communicating pipe at the front of the two low-pressure cylinders, so that the flow of each low-pressure cylinder is half the flow of the low-pressure cylinder of the 300MW-capacity-level steam turbine in the prior art, and the flow is greatly reduced; the length of the last-stage blade is shortened, the adjusting range of back pressure is expanded, and the safety of the system is improved; and in the non-heating period, the steam turbine set runs under the straight condensing condition. The invention is applicable for a 300MW-capacity-level combined heat and power steam turbine set to implement low vacuum heat supply.

The invention relates to a low-temperature exhaust air source spray heat capturing efficient water source heat pump fresh air system. The low-temperature exhaust air source spray heat capturing efficient water source heat pump fresh air system has the advantages that antifreeze fluid is sprayed to capture heat from a low-temperature exhaust air source, and the heat is boosted to be the heat of high quantity by a water source heat pump and then used for heating fresh air of a mine, so that the freezing of spray water is avoided; the heat pump absorbs heat in a high flow manner so as to increase evaporating temperature and energy efficiency; a fluid supply pool and a fluid return pool are subjected to cold-hot separation, and the heat pump is enabled to obtain fluid from the fluid supply pool which is heated after spray heat capturing, so as to increase the evaporating temperature and the energy efficiency; a spraying chamber is enabled to obtain fluid from the fluid return pool which is cooled after the heat pump carries out evaporating heat absorption, so as to increase heat exchange temperature difference and heat capturing efficiency; the temperature of supply water of the heat pump is reduced so as to increase heating efficiency; and the heat pump supplies heat in a low flow manner so as to reduce circulatory pumping power.

The invention relates to a low-temperature floor radiation hearing and refrigerating system device, comprising a solar hot water circulating system and a heat pump circulating system, wherein the heat pump circulating system comprises a heat pump unit, an underground water circulating system, a main water supply pipe and a main water return pipe, a water inlet end of the heat pump unit is connected with the underground water circulating system and a water outlet end of the heat pump unit is connected with the main water supply pipe and the main water return pipe, the main water supply pipe isprovided with a temperature adjusting device which is connected with the solar hot water circulating system and the underground water circulating system via pipelines respectively, and the main waterreturn pipe is connected with the underground water circulating system via the pipeline; during refrigeration, hot water is fed to the main water supply pipe via the solar hot water circulating system, the temperature of the circulating water in the main water supply pipe is adjusted by the temperature adjusting device, the circulating water is adjusted to the temperature required by no condensation, the circulating water inside an indoor coil pipe is circulated on condition that the temperature of the circulating water is constantly controlled within the scope of dew point, thus the problem that condensed water can be generated by refrigeration in summer easily can be solved.

The invention discloses an air-conditioner control method and device. The air-conditioner control method includes steps of detecting a first temperature difference between a first water supply temperature and a first water return temperature of the air conditioning unit; judging whether a first difference between the first temperature difference and a preset temperature is larger than a first preset threshold or not; if the first difference is larger than the first preset threshold, adjusting frequency of a freezing water pump in the air conditioning unit, so that a second difference between a second temperature difference between a second water supply temperature and a second water return temperature of the air conditioning unit and the preset temperature is smaller than or equal to the first preset threshold under the adjusted frequency of the freezing water pump. The air-conditioner control method solves the technical problem of instable system load caused by variable water temperature or flow control of the air conditioners in the prior art and has the technical advantages that system load stability is maintained, refrigeration and moisturizing of the tail end of the air conditions are guaranteed and system energy consumption is lowered.

The invention discloses a method for determining a dynamic change rule of dew point temperature of an attached layer of a radiant ceiling. The method comprises the following specific steps of: firstly, determining influence factors of the dynamic change rule of the dew point temperature of the attached layer; and secondly, performing simulation by utilizing ANSYSY software to obtain sample data, and then based on SAS software, obtaining the dynamic change rule of the dew point temperature of the attached layer with a multivariate regression analysis method: y=12.78891+0.31639xb+0.19712xc-0.12698xd, wherein y is the dew point temperature of the attached layer, b is wet dissipation strength, c is a relative distance between a fresh air inlet and a test point of the attached layer, and d is a relative distance between a wet source and the test point of the attached layer. According to the method, an indoor wet diffusion model is constructed, an interaction relationship among a water supply parameter of a radiant plate, an indoor thermal and humid environment parameter and the dew point temperature of the attached layer is deeply researched, and the dynamic change rule of the dew point temperature of the attached layer is proposed with a statistic analysis method.

The invention discloses a high-and-low-temperature cycle performance testing device for several kinds of devices. The testing device comprises an outer circulation system, an inner circulation systemand a control system. The outer circulation system and the inner circulation system share one heat exchanger; and a refrigerant circulation passage and a circulation liquid circulation passage are arranged in the heat exchanger. The outer circulation system includes a circulation liquid tank, a three-way valve, and a heat exchange tube that is sleeved on to-be-tested equipment; the outlet of the circulation liquid tank is connected to an inlet of the circulation liquid circulation passage of the heat exchanger; a first inlet of the circulation liquid tank is connected to a first port of the three-way valve and a second inlet of the circulation liquid tank is connected to the heat exchange tube; a second port of the three-way valve is connected to the outlet of the circulation liquid circulation passage of the heat exchanger; and a third port of the three-way valve is connected to the heat exchange tube. According to the high-and-low-temperature cycle performance testing device, the temperature control is carried out precisely; the temperature is stable; the real working conditions can be simulated; and the high-and-low-temperature cycle performance testing device is suitable for high-and-low temperature testing of various devices.

The invention relates to an energy conservation control method of a constant-temperature water supply fixed-frequency heat pump hot-water heating system. The energy conservation control method is characterized in that the energy conservation control method of a control system comprises the following steps: a basic function formula among a water supply calculated temperature Tgj of a heat pump, an indoor set temperature Tsd and an outdoor environment temperature Tw is established, a first correction function formula calculated according to the water supply calculated temperature Tgj of the heat pump is established, and a second correction function formula calculated according to the water supply calculated temperature Tgj of the heat pump is established; by controlling the start-stop of a compressor of a fixed-frequency heat pump water heater, a water supply actual temperature Tgs is made to be 0-1 degree higher than the water supply calculated temperature Tgj obtained according to the second correction function formula; and the control system adjusts a water supply to water return proportion of a three-way proportioning valve through a deviation between detected water supply actual temperature Tgs and the water supply calculated temperature Tgj, so as to allow the water supply actual temperature Tgs and the water supply calculated temperature Tgj to tend to be consistent. The energy conservation control method has the advantages that the differences of heat preservation characteristics and hot water coil laying of different buildings is considered fully, automatic judgment and correction are carried out in an operating process, the energy conservation effect is more obvious, the supply water temperature is constant, and the temperature fluctuation of a room is small.

The invention relates to an energy-saving control method for a floor radiant heating system comprising a variable-frequency heat-pump water heater. The energy-saving control method is characterized by comprising steps as follows: a functional expression of a water supply calculating temperature Tgj of a floor and an outdoor environment temperature Tw is established by a control system through calculation according to performance of the variable-frequency heat-pump water heater and heat load characteristics of a heating room; a functional expression of a room calculating air temperature Tnj based on a thermal comfort degree of a human body and the outdoor environment temperature Tw is established by the control system; a rotating speed of a compressor of the variable-frequency heat-pump water heater is adjusted by the control system according to the difference value of a water supply actual temperature Tgs and the water supply calculating temperature Tgj, and the water supply actual calculating temperature Tgs and the water supply calculating temperature Tgj are enabled to be consistent; the opening degree of a tee proportion regulating valve is adjusted by the control system according to the difference value of a room actual air temperature Tns and a room calculating air temperature Tnj, and the room actual air temperature Tns and the room calculating air temperature Tnj are enabled to be consistent. The energy-saving control method has the advantages that the energy efficiency of the heat-pump water heater is higher, energy-saving operation is realized, the comfort degree of the human body is better and the like.

A water mixer, which can mix water in double directions and adjust the proportion of the mixed water in the process of heating, relates to a water mixer. The invention has the target of solving the problem of that: when an equalizer tank is installed in a heating net system, the interface is also fixed which can not be readjusted, and the proportion of the mixed water can not be changed, which is to say that the supply water temperature can not be adjusted in the process of running of the equalizer tank. An upper guide plate is arranged on the upper side of the cavity of a tube body. A lower guide plate is arranged on the lower side of the cavity of the tube body. An upper shaft is connected between the upper guide plate and the tube wall of the tube body. A lower shaft is connected between the lower guide plate and the tube wall of the tube body. The invention has the benefits that the water mixer can separately adjust the intake port water temperature of each building, which not only can satisfy the heating demands of various users, but also can reduce the overheat phenomena caused by improper regulating of the heat source, and the phenomenon of uneven cold and heat caused by different heating system design parameters between the different buildings in the same district. The invention has good water mixing effect, and can achieve a plurality of adjusting means of the heating net.

The invention relates to the technical field of an energy storage device and particularly relates to an energy storage device which is filled with phase change energy storage materials. The energy storage device comprises a water tank and an energy storage body arranged in the water tank, wherein the energy storage body comprises an energy storage box body which is fixedly connected with the inner wall of the water tank, a phase change material injection pipe, a phase change material leakage pipe, and a water passing pipe which is vertically arranged in the energy storage box body and is used for penetrating through the energy storage box body up and down; the energy storage box body is internally filled with phase change materials. The invention provides a heat accumulation device filled with the phase change materials; the phase change materials are used for storing solar energy and a water temperature is controlled in a certain range; not only are the requirements of heating water temperature met, but also the water supplying temperature is reduced; the heat radiation loss is reduced, the heat collection efficiency of a heat collector is improved and the heat accumulation amount is increased; the device is applied to combination use of a solar floor radiation heating system and the better effect can be obtained.

The invention discloses an air conditioner indoor unit enhancing radiation and convective heat exchange and improving comfort. The air conditioner indoor unit is characterized in that an upper air port is formed in a top plate of a unit body of the indoor unit; a lower air port is formed in the lower portion of a front vertical face of the unit body; a long and narrow air screen air outlet is formed in the upper portion of the front vertical face of the unit body in the horizontal direction; a heat exchanger is arranged in the unit body in an inclined manner; a two-way air supply cross-flow fan is arranged at the position, below the upper air port, in the unit body and located at the top of the heat exchanger; a heat exchange panel is arranged at the position, between the lower air port and the air screen air outlet, of the front vertical face of the unit body; and the air screen air outlet is communicated with an air pump located at the bottom of the unit body. The user-friendly upper-cold and lower-hot air supply mode is adopted, the heat exchange panel assists in heat exchange, and the air conditioner indoor unit is good in thermal comfort, capable of saving energy and efficient.

The invention discloses a cross type dew point evaporative cooling high-temperature water chilling unit. The cross type dew point evaporative cooling high-temperature water chilling unit comprises a unit shell body. An air inlet a and an air inlet b are formed in the two opposite side walls of the unit shell body correspondingly. A direct evaporative cooling element is arranged in the center in the unit shell body. A surface cooler a and a cross type dew point evaporative cooling element A are sequentially arranged between the air inlet a and the direct evaporative cooling element. A surface cooler b and a cross type dew point evaporative cooling element B are sequentially arranged between the air inlet b and the direct evaporative cooling element. An air outlet is formed in the position, corresponding to the top wall of the unit shell body, of the upper portion of the direct evaporative cooling element. According to the cross type dew point evaporative cooling high-temperature water chilling unit, not only can stable high-temperature chilled water be produced, but also the heat exchange efficiency can be effectively improved.

The invention discloses a large temperature difference centralized heating system using power plant waste heat and a work method. A two-stage water-water heat exchanger and a two-stage power drive heat pump unit are arranged in a two-stage net heat exchange station, a circular cooling water waste heat recycling heat exchanger, a circular cooling water waste heat recycling electric heat pump unit,steam-water heat exchanger and a water-water heat exchanger are arranged in a first-stage pipe network heat exchange station, on the premise of ensuring the secondary network normal water supply temperature, water supply temperature of a primary heat network can be greatly reduced, steam consumption of a heat supply system is greatly reduced, and the use proportion of thermal power plant circularwater waste heat is greatly improved. Meanwhile, it is ensured that a secondary pipe network has the normal water supply temperature and water supply and returning temperature difference, the water supply temperature of the primary heat network is reduced to 80 DEG C, the water supply temperature of a secondary pipe network reaches about 70 DEG C, and the normal running flow of the secondary pipenetwork and energy-saving running of the circular water pump are ensured.

The invention provides a control method of an air source heat pump unit system and the air source heat pump unit system. The control method comprises the steps that the temperature of a room is set to be T, and the temperature deviation value is set to be delta T1; the water supply temperature of the air source heat pump unit system is set to be T1, and the water return temperature of the air source heat pump unit system is set to be T2; whether the current temperature deviation value of the room is higher than a set temperature deviation value delta T1 or not is judged; and when the current temperature deviation value of the room is higher than the set temperature deviation value delta T1, the set water supply temperature T1 is reduced, and meanwhile it is ensured that delta T is not changed. Based on the technical scheme, by adjusting the operation state of the air source heat pump unit system, the actual water supply temperature of the air source heat pump unit system is reduced, the temperature difference between supply water and return water of the air source heat pump unit system is kept unchanged, in this way, the operation energy consumption of the air source heat pump unit system is reduced, and therefore the operation efficiency of the system is improved; and therefore, the comfort of the room is improved, and better experience is brought to the user.

A water mixer, which can mix water in double directions and adjust the proportion of the mixed water in the process of heating, relates to a water mixer. The invention has the target of solving the problem of that: when an equalizer tank is installed in a heating net system, the interface is also fixed which can not be readjusted, and the proportion of the mixed water can not be changed, which isto say that the supply water temperature can not be adjusted in the process of running of the equalizer tank. An upper guide plate is arranged on the upper side of the cavity of a tube body. A lower guide plate is arranged on the lower side of the cavity of the tube body. An upper shaft is connected between the upper guide plate and the tube wall of the tube body. A lower shaft is connected between the lower guide plate and the tube wall of the tube body. The invention has the benefits that the water mixer can separately adjust the intake port water temperature of each building, which not only can satisfy the heating demands of various users, but also can reduce the overheat phenomena caused by improper regulating of the heat source, and the phenomenon of uneven cold and heat caused by different heating system design parameters between the different buildings in the same district. The invention has good water mixing effect, and can achieve a plurality of adjusting means of the heatingnet.

The invention relates to a fin type pulsating heat pipe phase change energy storage integrated module and application. The fin type pulsating heat pipe phase change energy storage integrated module comprises a steel plate box which is formed by stainless steel plates, the lower layer of the steel plate box is paved with a polyurethane insulation layer, a plurality of sets of pulsating heat pipes are arranged in the steel plate box, fins for enhanced heat transfer are fully distributed on the pulsating heat pipes, the steel plate box is filled with a phase change energy storage material, and the upper end of the steel plate box is sealed with an aluminum plate. According to the fin type pulsating heat pipe phase change energy storage integrated module and application, the thermal inertia ofa radiator arranged at the tail end is perfected, the water supply temperature required by a heating system is reduced, efficient and multiple utilization of energy sources in building heat supply isachieved, and the problem that at present, the environment is polluted by country fire coal heating in cold regions is solved.

The invention relates to an energy-saving control method of a frequency-fixed heat pump water heater floor radiant heating system. The method is characterized by including the energy-saving control steps of calculating the functional expression between the water supply calculation temperature Tgj of a floor and the outdoor environment temperature Tw through a control system according to the performance of a frequency-fixed heat pump water heater and thermal load characteristics of a heating room, establishing the functional expression between the room calculation air temperature Tnj based on the human body thermal comfort degree and the outdoor environment temperature Tw through the control system, and making the water supply calculation temperature Tgj+ / -1 DEG C serve as the start and stop control temperature of the frequency-fixed heat pump water heater through the control system. The method has the advantages that the energy efficiency of the heat pump water heater is high, and energy-saving running and the higher human body comfort degree are achieved.

A heat recovery and sustained release device used for a heat supply system includes a heat source side system (1) and an end system (2), and also includes an energy storage module (3) and an internalcirculation pump (4); and through adoption of an energy storage technology, when a load of the end system produces a sudden change from large to small, heat is quickly extracted and stored from the end system and is used for eliminating thermal inertia of the heat supply system.

The invention discloses an active solar glass greenhouse based on natural energy intelligent temperature control and an operation mode, and belongs to the technical field of agricultural greenhouses and clean heat supply. Aiming at the problems of great heat and cold supply load, high energy consumption and high energy cost caused by poor heat insulation effect of an enclosure structure of a current greenhouse, a clean heat supply system mode based on natural energy intelligent temperature control is adopted, a brand new embedded pipe type enclosure structure is adopted, low-temperature heat source water of a terrestrial water source is introduced into an embedded pipe, heat dissipation of an external environment is borne by the structure at night in winter, and solar radiation is absorbed to release heat in the daytime in summer, so that the heat and cold supply load is remarkably reduced; a low-temperature distributed terminal device is adopted indoors; the clean heat source system is composed of terrestrial water source heat energy, solar energy, air energy, a heat pump unit and an energy storage tank, the terrestrial water source heat energy is directly supplied to the embedded pipe type enclosure structure, the low-temperature side of a heat pump and a cooling wet curtain, high-temperature heat energy is supplied to the indoor terminal in winter, and the air energy and the solar energy supplement heat for the terrestrial water source in summer. According to the invention, the full-year intelligent, efficient and clean heat and cold supply of the greenhouse is realized.

The invention discloses a water mixing device of a water distributing and collecting device. The water mixing device is characterized in that an electric three-way regulating valve, a circulating water pump and a water temperature sensor are arranged on a water supply pipeline where a cooling and heating water inlet pipe is connected with a water distributor, a three-way pipe and an electric stop valve are arranged on a water return pipeline where a water collector is connected with a cooling and heating water outlet pipe, and the three-way pipe is combined with a water return branch pipe for connecting return water on the water return pipeline into the electric three-way regulating valve; and the water mixing device further comprises an indoor dew point temperature probe, an indoor temperature sensor, a temperature control panel, an electric three-way regulating valve, a circulating water pump, a water temperature sensor and an electric stop valve, wherein the indoor dew point temperature probe and the indoor temperature sensor are electrically connected with the temperature control panel. Meanwhile, the invention further discloses a control method of the water mixing device. The water mixing device is simple in structure and stable in operation, the water mixing device is arranged at the radiation tail end of a fresh air conditioning system and can be directly connected into a conventional air conditioning water system, condensation caused by too low water supply temperature in summer can be avoided, and the situation that the service life of components and radiant tubes is affected by too high water supply temperature in winter can be prevented.

The invention discloses a multi-energy large temperature difference area cooling device, which includes a cooling station, a transmission pipe network and a user end; the cooling station includes a refrigeration system, an energy storage system, a water separator and a water collector; the machine of the refrigeration system The on-board absorption chiller and the on-board centrifugal chiller are connected in series, the inlet of the on-board absorption chiller is connected to the water storage tank and the chilled water return pipe of the water collector respectively through valves, and the outlet of the on-board centrifugal chiller is connected to the chilled water return pipe through valves respectively. The storage tank is connected to the chilled water supply pipe of the water separator; the inlet of the storage tank is respectively connected to the outlet of the onboard centrifugal chiller and the outlet of the cooling end of the water storage cooling plate through valves, and the outlet of the storage tank is respectively connected to the onboard The inlet of the absorption chiller is connected to the inlet of the water-storage cold-supply plate for cooling; the invention can make full use of various energy sources, can apply waste heat refrigeration, realize energy cascade utilization, and improve the primary energy utilization rate.

The invention discloses an air-conditioner control method and device. The air-conditioner control method includes steps of detecting a first temperature difference between a first water supply temperature and a first water return temperature of the air conditioning unit; judging whether a first difference between the first temperature difference and a preset temperature is larger than a first preset threshold or not; if the first difference is larger than the first preset threshold, adjusting frequency of a freezing water pump in the air conditioning unit, so that a second difference between a second temperature difference between a second water supply temperature and a second water return temperature of the air conditioning unit and the preset temperature is smaller than or equal to the first preset threshold under the adjusted frequency of the freezing water pump. The air-conditioner control method solves the technical problem of instable system load caused by variable water temperature or flow control of the air conditioners in the prior art and has the technical advantages that system load stability is maintained, refrigeration and moisturizing of the tail end of the air conditions are guaranteed and system energy consumption is lowered.

The invention discloses a white smoke elimination system for blast furnace slag flushing dead steam, and belongs to the technical field of white smoke elimination of blast furnace slag flushing dead steam. The white smoke elimination system comprises a slag trough, a granulation tower, a granulation tower outlet water pipeline, a stirring cage, a stirring cage sealing cover, a dead steam pipeline, a stirring cage outlet water pipeline, a cooling tower, a slag flushing water supply pump, a slag flushing water supply pipeline, an environment-friendly condensation, dehumidification and white smoke elimination device, a condensate water collecting pipeline, a condensate water tank, a condensate water pressure pump and a condensate water conveying pipeline. The system has the advantage that the problems that the blast furnace slag flushing dead steam generation amount is large, the dead steam emission moisture content is large, corrosion and white smoke plume caused by chimney rain pollute the environment, and water resources are wasted are solved.

The invention relates to an energy-saving control method for an adaptive frequency conversion heat pump hot water heating system. Judging the temperature difference between the calculated temperature and the actual temperature of the return water, correcting the calculated temperature of the heat pump water supply; The calculated temperature is corrected again; according to the difference between the actual temperature of the water supply and the calculated temperature of the heat pump water supply obtained by the second correction function, the compressor speed of the variable frequency heat pump water heater is adjusted so that the actual calculated temperature of the water supply is consistent with the calculated temperature of the heat pump water supply. Its advantages are: taking full account of the differences in thermal insulation characteristics of different buildings and the laying of hot water coils, the calculated temperature of water supply is more accurate, and the energy saving effect is more obvious.

A heat recovery and sustained release device used for a heat supply system includes a heat source side system (1) and an end system (2), and also includes an energy storage module (3) and an internalcirculation pump (4); and through adoption of an energy storage technology, when a load of the end system produces a sudden change from large to small, heat is quickly extracted and stored from the end system and is used for eliminating thermal inertia of the heat supply system.