245results about "Machines using solar energy" patented technology

The invention discloses a Carnot battery system based on a cross-seasonal energy storage technology and a control method, and the Carnot battery system comprises a cascade heat pump unit, a buried pipe heat storage unit, an organic Rankine cycle unit and a renewable heat source utilization energy storage unit, when the temperature of the external environment is high in summer, heat exchange with the external environment can be conducted through the first heat removal and exchange module to provide a heat source for the second heat removal and exchange module, and heat exchange is conducted through the second heat removal and exchange module so that the temperature of a power generation fluid medium can be increased; when the external environment temperature is low in winter, a heat source can be provided for the second heat removal and exchange module through heat exchange between the first heat exchange module and the buried pipe heat storage unit, heat exchange is conducted through the second heat removal and exchange module so that the temperature of a power generation fluid medium can be increased, and the energy storage system is prevented from being affected by the external temperature; and high-efficiency operation in different seasons is ensured. The method provided by the invention solves the technical problem of low power generation efficiency in winter by utilizing environment heat exchange in the Carnot battery energy storage technology in the prior art.

The invention discloses a photovoltaic photo-thermal heat pump system, a control method of the photovoltaic photo-thermal heat pump system and an air conditioning system. The photovoltaic photo-thermal heat pump system comprises a main refrigerant flow path provided with a compressor, a first branch connected with the main refrigerant flow path and provided with a photovoltaic photo-thermal assembly, and a second branch connected with the main refrigerant flow path and provided with a first heat exchanger. A first adjusting valve is arranged at the joint of the main refrigerant flow path and the first branch and the joint of the main refrigerant flow path and the second branch, and the first adjusting valve can distribute the proportion of refrigerants flowing into the first branch and the second branch in the main refrigerant flow path. Compared with the prior art, according to the system for connecting the heat pump system and the photovoltaic photo-thermal assembly in parallel and the control method, the refrigerant pump is matched with the adjusting valve, so that the power consumption of the compressor under various working conditions is reduced; and meanwhile, the working point of the photovoltaic photo-thermal heat pump system is adjusted by comparing the power consumption increment of the compressor with the total gain of the photovoltaic photo-thermal heat pump system, so that the optimal energy efficiency working point is achieved.

The invention discloses a solar refrigeration device and a permafrost protection method, and belongs to the technical field of permafrost protection.The refrigeration device comprises a solar driving unit, an absorption type refrigeration unit and a cooling capacity transmission unit, and the solar driving unit provides a heat source for a bubble generator of the absorption type refrigeration unit and provides power for circulating flowing of a refrigerant; and a condensation section of the cold energy transmission unit is arranged in the cold storage assembly to absorb cold energy, and the cold energy is transmitted to a permafrost degeneration disease work site where the traffic infrastructure is located through a refrigeration section to protect permafrost. The green refrigeration technology is introduced into the field of traffic infrastructure from the field of building environment, the refrigeration device and the condensation section and the refrigeration section of the cooling capacity transmission unit are separately arranged according to application scenes, the function of protecting permafrost is achieved, and the scene adaptability is high; solar energy is used as a driving source, external power supply is not needed, self-driven operation is achieved, the intelligent degree is high, and green and energy-saving effects are achieved; no moving part exists, and the service life is long; installation is convenient, operation is automatic, and reliability is high.

The invention discloses a photovoltaic-heat pump cooperative energy storage system defrosting control method, device and system, electronic equipment and a storage medium, the photovoltaic-heat pump cooperative energy storage system comprises a heat storage module, a heat circulation pipeline and a plurality of electric heating modules, and the heat storage module outputs heat energy to an evaporator through the heat circulation pipeline for defrosting. On one hand, the photovoltaic unit supplies power to the electric heating module for defrosting, and the heat storage module outputs heat energy for defrosting, so that the dependence of defrosting on a power grid can be reduced, the supply proportion of the photovoltaic unit in defrosting energy consumption is increased, the electric charge expenditure is saved for a user, the carbon emission is reduced, the peak load of the power grid is relieved, and the energy utilization rate of the photovoltaic unit is increased; partial defrosting can be achieved by supplying power to part of the electric heating modules through the photovoltaic unit, global defrosting is achieved by outputting heat energy through the heat storage module, different defrosting modes are adopted in different frosting states, the energy efficiency of the system is improved, and defrosting can be achieved through the heat storage module when the generating capacity of the photovoltaic unit is low in extreme weather.

The present invention discloses a constant temperature system for roadbed and pavement, which relates to the technical field of road temperature control, and includes a ground heat exchange component arranged below the road surface; a buried pipe heat exchange device buried underground; a pipeline component; a heat pump unit, the buried pipe heat exchange device is connected to the heat pump unit; the heat pump unit is connected to the ground heat exchange component; a solar device, the solar device is connected to the heat pump unit; a cooling water device, the cooling water device is connected to the heat pump unit; a phase change energy storage device, the phase change energy storage device is connected to the solar device and the cooling water device; the phase change energy storage device can input hot water in the solar device for heat exchange and energy storage, and output the cooling water after heat exchange to the cooling water device for cold storage; the phase change energy storage device can input cooling water in the cooling water device to heat it up, and output the heated water to the heat pump unit through the pipeline component for heating. The present invention comprehensively utilizes various forms of energy to achieve heat balance regulation of roadbed and pavement in different seasons.

The present disclosure discloses a multi-energy coupled cooling / heating system for buildings in a long-term cooling region, including a multi-level management unit for heat sources, a solar energy heat collection unit, a lithium bromide absorptive refrigeration unit, a gas heat complementing unit, a ground source heat pump cooling / heating unit, and an indirect evaporative cooling waste heat recovery unit; the multi-level management unit for heat sources is connected to the solar energy heat collection unit, the lithium bromide absorptive refrigeration unit, the gas heat complementing unit, and the ground source heat pump cooling / heating unit; the ground source heat pump cooling / heating unit is connected to the indirect evaporative cooling waste heat recovery unit. The present disclosure adopts double-water tank structure, designs based on stratification principle, so as to achieve heat source classification management.

The systems of the present disclosure include a solar-powered steam Rankine cycle (SRC) subsystem to convert solar energy into thermal energy and store the thermal energy; an ejector refrigeration cycle (ERC) subsystem to provide a first refrigeration effect with a first range of temperature based on the thermal energy; an absorption refrigeration cycle (ARC) subsystem to provide a second refrigeration effect with a second range of temperature based on the thermal energy; a brine refrigeration cycle (BRC) subsystem to generate and store when there is no cooling demand and provide a third refrigeration effect with a third range of temperature based on the electrical power generated by the ERC subsystem and the ice being melted; and an adsorption refrigeration cycle (ADRC) subsystem to provide a fourth refrigeration effect with a fourth range of temperature based on the thermal energy.

The invention relates to a solar PV / T circulating system integrating thermochemical adsorption cold storage and radiation cooling. The solar PV / T circulating system comprises loop heat pipe circulation which comprises an integrated radiation cooling PV / T assembly, a photovoltaic controller and a working medium pump. The PV / T assembly is of a turnover structure, the front face of the PV / T assembly is used for absorbing sunlight radiation, and the back face of the PV / T assembly is used for radiation heat exchange to cool the refrigerant. The vapor compression refrigeration cycle comprises a direct-current variable-frequency compressor, a condenser, a first evaporator and a plate heat exchanger; the thermochemical adsorption cold storage cycle comprises an adsorption cold storage unit, a liquid ammonia storage tank and a second evaporator; wherein an adsorbent capable of adsorbing ammonia gas and desorbing and releasing the ammonia gas is loaded in the adsorption cold storage unit. Compared with the prior art, the solar PV / T circulating system has the advantages that collaborative operation of solar photovoltaic cold supply and photo-thermal cold storage can be achieved, the solar energy utilization rate is increased, and all-weather and stable cold supply of the data center can be guaranteed.

The present invention relates to the field of new energy application technology, and specifically to a photovoltaic power generation cold and heat energy recovery and utilization device and method. Photovoltaic modules are used and installed in groups and tilted to form a controllable closed structure, and a layer of movable transparent insulation film is installed on the photovoltaic modules to cover and seal the photovoltaic modules for insulation during the heating season; then the light and heat energy absorbed by the photovoltaic modules is collected by a heat pump, and the heat energy is stored by a heat accumulator, and combined with the control of intelligent trough energy storage at night, it is used for heating; in the non-heating season, the photovoltaic closed space is opened, and the transparent insulation film on the module is rolled up to reduce the temperature of the module and the room to improve the efficiency of photovoltaic power generation, and the heat accumulator is used to store cold for indoor use. The present invention can increase the utilization rate of solar energy by 200% compared with simple photovoltaic power generation, and increase the efficiency by more than 40% compared with ordinary heat pumps. It can solve the problems of clean heating and long-term income increase in rural areas at a low cost.

A solar environmental control system includes a solar powered apparatus and a heat transfer apparatus. The solar collection apparatus includes a solar collector for absorbing solar energy, a heat storage medium, and a generator. A heat transfer fluid circulates between the solar collector, the heat storage medium, and the generator.

The invention relates to the technical field of photoelectricity, in particular to a circulating type solar PVT heat pump combined supply hot water making system which comprises a water storage tank and photo-thermal plates which are connected through a heat pump unit, the number of the photo-thermal plates is multiple, the photo-thermal plates are arranged in a rectangular array mode, and all the photo-thermal plates jointly form a photo-thermal unit; first winding machines are arranged at the four corners of the photo-thermal unit, and the two first winding machines in the same row are connected with the same first moving trolley through first steel wire ropes. The two first moving trolleys are each provided with a second winding machine, and the two second winding machines are connected with the same second moving trolley through a second steel wire rope. A rotating seat and a driving unit are arranged on the second moving trolley, and a dust collection unit, a washing unit and a wiping unit which are sequentially arranged in the arrangement direction of the photo-thermal plates in the same row are arranged on the rotating seat. According to the invention, the normal combined supply function of the system can be ensured.

Disclosed in the present invention are a multi-energy coupling cooling and heating system for a building in a long-term cooling region, and an operation method. The system comprises a heat source grading management unit, a solar heat collection unit, a lithium bromide absorption refrigeration unit, a gas supplementary heating unit, a soil source heat pump cooling and heating unit, and an indirect evaporative cooling waste heat recovery unit; the heat source grading management unit is connected to the solar heat collection unit, the lithium bromide absorption refrigeration unit, the gas supplementary heating unit, and the soil source heat pump cooling and heating unit; and the indirect evaporative cooling waste heat recovery unit is connected to the soil source heat pump cooling and heating unit. A heat storage device of the present invention uses a double-water-tank mode, and is designed on the basis of the layering principle, graded heat management of different grades of energy sources is achieved, solar energy, geothermal energy, gas, waste heat, and evaporation cold energy of water are fully utilized, and the system exergy loss is reduced and the energy utilization efficiency is improved while annual cooling, heating and domestic hot water requirements of buildings are met.

According to the double-source heat pump system, intelligent compensation is conducted through external energy, the energy is utilized to the maximum extent, the commercial power input proportion of a heat pump is reduced, and the economic cost is saved. The inverter compressor assembly comprises an inverter compressor, a four-way valve, a gas-liquid separator, a high-voltage switch and a low-voltage switch; the water side heat exchanger comprises a water pipe and a heat exchange pipe assembly, the water pipe is provided with a heating water inlet end and a heating water outlet end, the heat exchange pipe assembly is located in an inner cavity of the water pipe, and the heat exchange pipe assembly comprises a medium inlet and a medium outlet; a liquid reservoir; the two groups of electronic expansion valves comprise a first electronic expansion valve and a second electronic expansion valve; the fin type heat exchanger comprises a fin coil pipe and a fan assembly; and the plate heat exchanger comprises a refrigerant heat exchange channel and an external heat exchange water channel.

The invention discloses a fruit and vegetable processing heat energy comprehensive utilization system utilizing solar energy, and relates to the technical field of energy utilization, the fruit and vegetable processing heat energy comprehensive utilization system comprises an electric power supply unit, a heat collection unit, a heat storage unit, a drying unit, a heat pump unit, a cold storage unit, a freezing unit and a greenhouse planting unit, the photovoltaic and photo-thermal integrated system is electrically connected with the power utilization unit, the heat collection unit can collect heat through solar energy, a fluid working medium of the heat collection unit communicates with the heat storage unit through a pipeline, and the heat storage unit can store a heat source transmitted by the heat collection unit and can transmit the heat source to the drying unit. A driving heat source of the heat pump unit comes from the photovoltaic photo-thermal integrated system, a cold source from the heat pump unit is sequentially communicated with the cold storage unit and the freezing unit, and a fluid working medium from the freezing unit and a fluid working medium from the drying unit are communicated with the greenhouse planting unit. Solar energy is converted into electric energy and heat energy which are stored as cold / heat energy, and the purposes of energy conservation and emission reduction are achieved.

The invention relates to the technical field of heat pump units, in particular to a solar heat pump unit and a control method thereof.The solar heat pump unit comprises a base, a water tank and a heat pump unit shell are integrally formed at the top of the base, a protection plate is movably installed on one side of the heat pump unit shell, and a rainproof assembly is arranged on the side, away from the heat pump unit shell, of the protection plate; a cleaning assembly is arranged on the side, away from the rainproof assembly, of the protection plate, and a solar evaporator, a compressor and a condenser are sequentially and fixedly connected to the inner bottom face of the heat pump unit shell from left to right. According to the improved solar heat pump unit, the solar evaporator and the protection plate in the heat pump unit are cleaned through the cleaning assembly, the situation that the heat absorption effect of the solar evaporator is reduced due to dust attachment is prevented, when the cleaning assembly operates, bristles can be automatically cleaned, and dust on the surface of a filter column is scraped away; the replacement frequency of the roller column is reduced, and the cost is saved.

The invention discloses an absorption refrigeration system based on combined driving of solar energy and waste heat of a data center. The absorption refrigeration system comprises a multi-energy complementary heat collection circulation module and an absorption refrigeration circulation module. The multi-energy complementary heat collection circulation module comprises a solar heating unit, a liquid cooling cabinet and a plate heat exchanger. And the solar heating unit and the liquid cooling cabinet are respectively connected with the plate heat exchanger. And the absorption refrigeration cycle module is connected with the multi-energy complementary heat collection cycle module. The absorption type refrigeration cycle module comprises an absorption type refrigeration cycle generator, a gas-liquid separator, a condenser, an evaporator, a mixer, an absorber and a solution exchanger. And the absorption refrigeration cycle generator is connected with the plate heat exchanger and the gas-liquid separator. And the gas-liquid separator is connected with the condenser and the solution exchanger. And the condenser is connected with the evaporator. The mixer is connected with the solution exchanger, the evaporator and the absorber. And the absorber is connected with the absorption refrigeration cycle generator. Dependence on external energy can be reduced, and the energy utilization efficiency is improved.

An add-on apparatus for improving the overall efficiency of a conventional air-source air conditioner or air-source heat pump is disclosed. The add-on apparatus is a combination of piping and at least one controllable valve that provides fluid and electric or electronic control communication between the host receiving air conditioner or heat pump piping circuit and a discretionary interacting energy exchange means. The add-on apparatus having connecting refrigerant gas piping and connecting refrigerant liquid piping for communicating fluids between the host and interacting energy source. The electric or electronic communication can employ self-teaching software and have the ability to override a conventional air conditioning or heat pump control system.

The present invention relates to a multi-source coupled high-temperature steam heat pump, comprising: a first heat exchanger and a second heat exchanger; an energy storage tank; a water circulation coil, each circle of the water circulation coil is provided with an opening, and all the openings are arranged longitudinally; a water circulation stroke adjustment device, comprising a longitudinal driving member, a connecting joint, and a connecting joint driving member, the connecting joint driving member drives the connecting joint to move toward one of the openings, the water outlet of the first heat exchanger, the upper water circulation coil, the connecting joint, and the water inlet of the first heat exchanger form a first water circulation, the water outlet of the second heat exchanger, the lower water circulation coil, the connecting joint, and the water inlet of the second heat exchanger form a second water circulation, and the longitudinal driving member drives and adjusts the number of circles of the upper water circulation coil and the lower water circulation coil; a flash tank, connected to the energy storage tank, for generating steam.

A radiation heat dissipation and radiation heat collection-based cold and hot central air conditioning system includes a compressor, a liquid storage device, an indoor unit and an outdoor unit connected in sequence, the outdoor unit includes a radiation heat collector; the radiation heat collector includes a protective plate, a heat absorption plate, and a plate core; the heat absorption plate is located between the plate core and the protective plate; the plate core comprises a heat exchange medium inlet end and a heat exchange medium outlet end; and the heat absorption plate is used for transferring absorbed heat to a heat exchange medium circulating in the plate core. The heat absorption plate collects heat, and then transfers the heat to the heat exchange medium flowing in the plate core; and the heat exchange medium carrying the heat is compressed by the compressor, and then enters the indoor unit for heat exchange.

A solar powered refrigerator device for cooling food items and producing ice cubes in a remote location includes a refrigerator which has an internal compartment for containing cold food items. A refrigeration unit is integrated into the refrigerator to cool the cold food items in the internal compartment. A door is hingedly disposed on the refrigerator for opening and closing the internal compartment and an ice maker is integrated into the refrigerator to release ice cubes for cooling a beverage. The refrigerator has a peaked housing located on top of the refrigerator and the peaked housing tapers into a peak such that the peaked housing has a triangular shape.

The invention relates to the field of renewable energy source and intelligent control system integration, in particular to a solar ground source heat pump system heat storage and release balance method based on adaptive learning. Comprising the following steps: S1, defining an energy type, namely first heat energy which is electric energy supplied to a ground source heat pump system by direct-current power subjected to photovoltaic conversion; the second heat energy is electric power which is stored in the energy storage device and subjected to photoelectric conversion; the third heat energy is solar heat energy stored in the sensible heat or latent heat accumulator; the fourth heat energy is solar heat energy stored through the underground aquifer. According to the method, four heat energy types and conversion nodes are defined, the energy cycle period is evaluated, refined energy allocation is achieved, and continuous energy supply in severe weather is ensured; heat storage and release balance of the ground source heat pump is verified and adjusted, a self-adaptive learning model is constructed, fourth heat energy compensation is introduced, the flexibility and adaptability of the system are enhanced, the intelligent level and the response speed are remarkably improved, and efficient and reliable energy management is achieved.

To provide an air conditioning panel that can solve problems related to area arrangement and also exhibit more sufficient performance.SOLUTION: An air conditioning panel 1 comprises: a regenerative absorber 10 which has an absorbing liquid absorbing a vapor refrigerant or an adsorbent adsorbing a vapor refrigerant, and is heated with the sunlight to discharge the absorbed or adsorbed vapor refrigerant; a condenser 20 which liquefies the vapor refrigerant discharged from the regenerative absorber 10 into a liquid refrigerant; and a vaporizer 30 which vaporizes the liquid refrigerant from the condenser 20. The regenerative absorber 10 and condenser 20 are formed on a panel one-surface side to be exposed to the sunlight, and the vaporizer 30 is formed on a panel other-surface side opposite from the panel one-surface side. A first domain P1 on the panel one-surface side corresponding to the regenerative absorber 10 is processed to have a solar radiation absorption ratio of 80% or larger and a far-infrared radiation ratio of 80% or larger, and a second domain P2 on the panel one-surface side corresponding to the condenser 20 is processed to have a solar radiation reflection ratio of 80% or larger.SELECTED DRAWING: Figure 1

An embodiment of the present invention discloses a control method, a control device and a solar heat pump system for protecting the fluorine-deficient state during the operation of the refrigerant compressor in the solar heat pump system. By only monitoring three temperatures, namely the ambient temperature, the water temperature and the exhaust gas temperature, the fluorine-containing state of the solar heat pump system is determined, and then according to the fluorine-containing state, the purpose of automatically controlling the working state of the refrigerant compressor is achieved. This method only collects the ambient temperature Th, the water temperature Ts and the exhaust gas temperature Tp, avoiding the influence of sunlight, which is beneficial to the evaluation of the fluorine-containing state of the solar heat pump system and better protects the solar heat pump water heater from fluorine deficiency.

The invention relates to the technical field of heat pumps and refrigeration, in particular to an enhanced vapor injection energy-saving CO2 heat pump refrigeration system with photo-thermal heat storage, which comprises a main loop, a first enhanced vapor injection loop and a second enhanced vapor injection loop. The system is applied to refrigeration or heat pump working conditions, the first enthalpy increasing loop increases the gas displacement of the compressor through gas supplementation, and the heating capacity of the system is improved; the second enthalpy increasing loop is provided with a photo-thermal heat storage heat exchanger to absorb sunlight for heat storage; the branch absorbs heat in the photo-thermal heat storage heat exchanger to improve the heating capacity of the system; the heat regenerator and the photo-thermal heat storage heat exchanger in the main loop achieve cascade supercooling of CO2 fluid on the high-temperature side and superheating of CO2 fluid on the low-temperature side, and the operation COP of the system under the low-temperature working condition is improved. Fins of the low-temperature side heat exchanger adopt a composite coating made of a photo-thermal material and a temperature-sensitive material, so that frost prevention in a low-temperature environment and non-stop quick defrosting drainage are realized, frequent start and stop of the system are avoided, and the operation performance and the operation stability of the system under a low-temperature working condition are improved.

This invention provides a solar-powered full-spectrum frequency-division thermo-electric combined-drive air conditioning system and its control method, belonging to the field of solar heat pumps. It addresses the problems of existing solar-powered jet-compression combined refrigeration systems, which cannot effectively utilize all wavelengths of solar energy, suffer from intermittent instability during power supply, and exhibit low cooling efficiency due to excessively high compression ratios under high temperature difference conditions. During conventional cooling, the system allows selection of single-jet cooling, single-compression cooling, jet-compression combined cooling, or dual-jet-compression combined cooling based on daytime or nighttime conditions and cooling requirements, achieving stable all-weather air conditioning while saving energy. In addition to the conventional cooling mode, a dual-jet-compression cooling mode can be operated to achieve high temperature difference cooling while maintaining a constant compression ratio. It fully utilizes solar thermo-electricity for self-generation and consumption, enabling switching between jet and compression air conditioning modes to ensure all-weather air conditioning needs while achieving energy conservation and emission reduction.

The present invention discloses a composite heat pipe for soil temperature regulation and its control method, which includes a solar photovoltaic device, a composite refrigeration device and a control module. The control module is respectively connected to the solar photovoltaic device and the composite refrigeration device. The solar photovoltaic device includes a solar photovoltaic panel, an electric energy controller, a storage battery, an inverter and an electric meter. The composite refrigeration device includes an air-cooled condenser, an electric valve, an electric expansion valve, a compressor, a self-standing three-way valve and a direct expansion evaporator. The control module includes a sensor and a controller. By sharing the condenser and the evaporator and ingeniously designing valves and refrigerant circulation pipelines, etc., the present invention can not only efficiently discharge the heat in the soil to low-temperature air, but also effectively discharge it to high-temperature air, realizing the economic efficiency of the device. The present invention can be widely applied in the field of temperature regulation devices.

The present invention relates to the field of integration of renewable energy and intelligent control systems, and in particular to a method for heat storage and release balance of a solar ground source heat pump system based on adaptive learning. The method comprises the following steps: S1: defining energy types, first thermal energy: DC power after photovoltaic conversion supplied to the ground source heat pump system; second thermal energy: electricity after photoelectric conversion stored in an energy storage device; third thermal energy: solar thermal energy stored in a sensible heat or latent heat accumulator; fourth thermal energy: solar thermal energy stored through an underground aquifer. The present invention defines four types of thermal energy and conversion nodes, evaluates the energy cycle, realizes refined energy allocation, and ensures uninterrupted energy supply in severe weather; verifies and adjusts the heat storage and release balance of the ground source heat pump, constructs an adaptive learning model, introduces the fourth thermal energy compensation, enhances system flexibility and adaptability, significantly improves the level of intelligence and response speed, and realizes efficient and reliable energy management.

The systems of the present disclosure include a solar-powered steam Rankine cycle (SRC) subsystem to convert solar energy into thermal energy and store the thermal energy; an ejector refrigeration cycle (ERC) subsystem to provide a first refrigeration effect with a first range of temperature based on the thermal energy; an absorption refrigeration cycle (ARC) subsystem to provide a second refrigeration effect with a second range of temperature based on the thermal energy; a brine refrigeration cycle (BRC) subsystem to generate and store when there is no cooling demand and provide a third refrigeration effect with a third range of temperature based on the electrical power generated by the ERC subsystem and the ice being melted; and an adsorption refrigeration cycle (ADRC) subsystem to provide a fourth refrigeration effect with a fourth range of temperature based on the thermal energy.

Battery powered hybrid reefers that use for their driving force, energy derived from the best-mix integrated combination of electrical power generated from an internal combustion engine generator, an electric grid, a wheel driven generator and at least one solar panel.

A solar energy auxiliary combined heat and power system and operation method, the system comprises a boiler, a high, medium and low pressure cylinder of a steam turbine, a condenser, a heat recovery system connected in sequence; further comprising a trough type solar heat collection system, a high and low temperature heat storage tank, an oil-water heat exchanger, a peak heater, a waste heat heater, an auxiliary heater, an absorption heat pump and various valves. During the daytime power peak and heat valley period, the solar energy drives the absorption heat pump and the peak heater, recovers the steam turbine exhaust and the waste heat of the heat network return water, under the premise of meeting the heat supply load, auxiliary improves the steam turbine power output; the excess solar heat is stored through the high temperature tank. During the night power valley and heat peak period, the high temperature tank releases heat to drive the absorption heat pump and the peak heater to recover the steam turbine exhaust and the waste heat of the heat network return water, which is used for heat supply of the heat network. The present application realizes the pure condensing condition operation of the combined heat and power unit in the heating season, and greatly improves the power output of the unit in the power peak period, and the peak regulation capacity is obviously improved.