1339 results about "Absorption heat pump" patented technology

The invention discloses a method for recovering the waste heat of a thermal power plant and heating and supplying heat to hot water in a stepping way. In the method, low-temperature heat-net return water is firstly mixed with circulating cooling water positioned on an outlet of a cooling condenser or exchanges heat with the circulating cooling water positioned on the outlet of the cooling condenser to be increased in temperature and then sequentially delivered into an each-step vapour absorption type heat pump and a vapor-water heat exchanger in a series connection way to be gradually heated to be increased in temperature to heat supplying temperature and finally discharged through a water supplying pipeline; the circulating cooling water absorbs the waste steam condensation heat of a steam turbine in the cooling condenser, then one path of the circulating cooling water is directly mixed with the low-temperature heat-net return water or heats the low-temperature heat-net return water through the heat changer, the other path of the circulating cooling water is delivered into an each-step absorption type heat pump unit to be used as a low-order heat source of the absorption type heat pump unit, and the redundant heat of the circulating cooling water is discharged to the environment through a cooling tower. The invention uses the steam extraction of the steam turbine as a driving heat source of the absorption type heat pump so that the low-temperature heat-net return water is heated in a stepping way, thereby reducing the effective energy loss; the waste heat of the discharged steam of the steam turbine is sufficiently recovered in a direct heating way and an absorption type heat pump temperature increasing heating way, therefore, the comprehensive energy usage efficiency of the thermal power plant is enhanced.

The invention relates to a central heating system with large temperature difference, which belongs to the energy field. The system comprises a steam turbine, a condenser, a steam absorption heat pump, a steam-water heat exchanger, a hot water absorption heat pump, a water-water heat exchanger as well as a connecting pipe and accessories. The invention is characterized in that the temperature difference of the heat net supply is large, and is about one time higher than the conventional heat net operation, thus the transmission capacity of the heat net is greatly increased, and at the same time, no heat preservation and thermal stress compensation problems exist as the backwater temperature of the heating is low, thereby reducing the investment of the backwater pipeline network and the whole pipeline network; the steam turbine is utilized to discharge steam and preheat the backwater of the large heat net, and circulating cooling water is utilized to be taken as the low level heat energy of the absorption heat pumps. The invention has the advantages that the residual heat produced in the electricity generating process of a power plant is recycled to the greatest extent as much as possible, the combination mode of the hot water absorption heat pump and the water-water heat exchanger is adopted at the end to heat the hot water of the secondary heat net supply, and the temperature difference of the supply-water and the backwater of the large heat net are increased, at the same time, the heat net does not need external energy to be the driving force.

The invention relates to a heat pump type heat exchange units, which belongs to the technical field of energy. The units are composed of hot water type absorption heat pump units, a water-water heat exchanger, various connecting pipelines and accessories, wherein a water flow system of the connecting pipelines is divided into a primary side pipeline and a secondary side pipeline, the primary side pipeline employs a manner of a step sequence series connection, hot water of the primary side pipeline sequentially passes through a generator of an absorption heat pump, the water-water heat exchanger and an evaporator of the absorption heat pump, hot water of the secondary side pipeline passes through an absorption device and a condenser of the absorption heat pump and the water-water heat exchanger, because the primary side pipeline of the heat exchange units sequentially passes through the generator of the absorption heat pump, the water-water heat exchanger and the evaporator of the absorption heat pump, energy of hot water is used step by step, thereby greatly increasing differential temperature between water supply and water return of primary side hot water. Additionally, outlet water temperature of primary side heat exchange units is commonly lower than that of secondary side inlet water, which can not be realized by conventional heat exchanger.

The invention belongs to heating systems and methods for coupling a circulating water heat pump of a power plant with cogeneration in the field of energy sources. The system consists of a steam turbine, a steam compressed heat pump, a small backpressure steam turbine, a heating network heater and corresponding pipelines and accessory equipment. The system uses circulating water of the power plant as a heat source of a heat pump; a heat pump compressor is driven by an intermediate-pressure steam driving small steam turbine which does work in the power plant; and the small team turbine exhausts steam which enters the heating network heater to heat the heating network water. In addition, the function for extracting the heat from a low-temperature heat source except the circulating water of the power plant can be achieved by using the coupling of an absorbing type heat pump with a primary network and a secondary network in the heating network. The invention fully utilizes a large amount of cold source loss of a condensing type unit, overcomes the defects of the cogeneration and the heat pump by using the synergistic action of the circulating water heat pump of the power plant with the cogeneration and realizes the regional centralized heating. By using the technical measures, the thermal economy of the central heating system taking a team turbine unit power plant as the center is improved.

The invention relates to an energy supply system mainly through gas and steam combined cycle cogeneration, and belongs to the technical field of energy sources. The system adopts a mode of combined heating of a smoke condensing heat exchanger, a condenser, a steam absorption heat pump, a high-temperature smoke heat exchanger and a steam-water heat exchanger on a heat source side; return water of a heat supply network directly recovers low-temperature smoke condensed waste heat, high-temperature smoke waste heat or condensed steam waste heat; and simultaneously, the steam absorption heat pump driven by extracted steam is used for recovering condensed steam discharged heat or partial smoke waste heat. During heat supply in winter, a client uses a supplementary-fired hot water absorption heat pump and a water-water heat exchanger to heat secondary water in the heat supply network for heat supply and extract low-grade heat for heat supply from a superficial layer soil source, an underground water source or a geothermal water source; and in summer, the client uses the hot water absorption heat pump to refrigerate hot water in the heat supply network and a liquid desiccant air conditioner to remove humidify and preheat domestic hot water. Compared with the conventional system, the system of the invention has good economy and application prospect; and the energy utilization rate of the system is greatly improved.

The invention discloses a method for reducing return water temperature of a heat supply pipeline, which belongs to the technical field of energy. A waterway system of the heat supply pipeline is divided into a primary network hot water pipeline and a secondary network hot water pipeline, and the return water temperature of a primary network of the heat supply pipeline of a centralized heat supply system is reduced with the help of an absorption heat pump / refrigerator and a water-water heat exchanger or the single absorption heat pump / refrigerator, thereby increasing the temperature difference between supply water and return water of the primary network, wherein, when the single absorption heat pump / refrigerator is used, the primary network hot water pipeline and the secondary network hot water pipeline are connected by adopting the direct connection way, when the absorption heat pump / refrigerator and the water-water heat exchanger are used, the primary network hot water pipeline and the second network hot water pipeline are connected by adopting the indirect connection way. The method can greatly reduce the return water temperature of the primary network pipeline, increase the temperature resistance between the supply water and the return water of the primary network, further reduce the initial development of the heat supply pipeline and the transmission and distribution energy consumption of the primary network to a greater extent, reduce the operation cost of centralized heat supply and enlarge the heat supply radius of a heat source for heat supply.

The invention discloses a heating system utilizing a heat pump technology to improve the heat capacity of a central heating pipe network and belongs to the field of central heating. The heating system provided by the invention comprises the central heating pipe network, wherein the central heating pipe network is divided into a primary net and a secondary net; the heating system also comprises anabsorption heat pump set, a primary net water supply pipeline is connected with the generator of the absorption heat pump set by virtue of a pipeline, and the primary water supply is taken as the driving heat source of the absorption heat pump; a primary net return pipe is connected with the evaporator of the absorption heat pump set by virtue of a pipeline, and a primary net backwater is taken as the lower-temperature heat source of the absorption heat pump set; and a secondary net backwater enters into the absorber and condenser of the absorption heat pump set in turn so as to be heated, warmed and then output as a secondary water supply. The heating system provided by the invention has the advantages of further increasing the temperature difference of the water supply and backwater of the primary net, and improving the heat transfer capability of the heating pipe net.

The invention belongs to the technical field of energy sources, and relates to a concentrated heat supply system for reclaiming smoke afterheat by an absorption heat pump. The system is used for reclaiming smoke afterheat of natural gas and water. The system is composed of a smoke flue, the absorption heat pump, a spray device, a water quality processing device and a circular water pump; smoke flows in the smoke flue from bottom to top; circular water is ejected by the spray device to form atomized drops for directly contacting with the smoke to exchange heat and is introduced to an evaporator of the absorption heat pump by the water pump after being processed by the water quality processing device after flowing out from the smoke flue; hot net returned water is sequentially introduced toan absorber and a condenser of the absorption heat pump; the circular water absorbing heat of the smoke and the hot net returned water are subjected to heat exchange in the absorption heat pump to reach the needed temperature and then are returned to a hot net. The smoke and the water are in direct contact for heat exchange in the invention; the heat of the circular water heated by the smoke is extracted from the absorption heat pump to raise the temperature of the returned water of the heat supply system; thus the total energy utilization rate of the concentrated heat supply system is increased; and the effects of cleaning the smoke and protecting the environment are achieved.

The invention discloses a glassworks low-temperature afterheat recycling system. Heat is stored underground through an underground pipe heat exchange unit; in winter, an absorption heat pump unit is matched to extract low-temperature afterheat for directly supplying the heat to peripheral communities; and in summer, a cooling tower is used for assisting cooling, so that recycling of low-grade industrial afterheat is realized, and the shortage problem of heating heat sources is effectively solved.

The invention relates to a heat-gaining combined heat and power system, which belongs to the application field of the energy technology, and consists of a gas engine, a power generator, an absorption-type heat pump, a high-temperature smoke-water heat exchanger, a middle-temperature smoke-water heat exchanger, a low-temperature smoke-water heat exchanger, a water-water heat exchanger, a solution dehumidifying system, a ground heat exchanger, a superficial-layer underground water well or a sewage heat exchanger and accessories such as connection pipes and valves. The system can realize two work conditions of heat supply and coldness supply, and is provided with multiple pipeline switching forms under the work conditions of the heat supply and the coldness supply so as to adapt to the requirements of different situations; the system can ensure the adequate utilization of the heat of the gas engine, can adequately recycle the surplus heat of the exhausted smoke of the gas engine in winter, and can realize the extraction of the heat of the low-temperature heat source so as to improve the comprehensive efficiency of the system and to reduce the environmental pollution; and the system can discharge the heat of the low-temperate smoke and the heat of the cooling water into the low-temperature heat source to be stored in summer; and moreover combined with the solution dehumidification and the living hot water, the energy utilization efficiency of the system can be improved.

The invention discloses a heat and power cogeneration centralized heat supply system based on a heat pump. An absorption type heat exchanger unit and a multi-stage electrically-driven heat pump are introduced, and a heat source is used as a power source and is used for heat exchange repeatedly, so that the utilization efficiency of a steam heat source is improved, and heat can be better supplied to a user; a solar heat collector is introduced, and primary grid backwater is heated by using clean energy namely solar energy, so that the energy is saved, and the environment is protected; in addition, a heat exchanger is additionally arranged in a thermal power plant, the temperature of the primary grid backwater is raised by using a low-grade heat source in a condensing engine, and a double-effect steam absorption type heat pump, a single-effect steam absorption type heat pump, a large-temperature-difference steam absorption type heat pump and a steam water heat exchanger are simultaneously introduced to recover low-grade heat step by step, so that exhaust steam in a turbine is effectively utilized, and the energy utilization efficiency is improved. According to the system, the power generation efficiency of a power plant is improved by over 30 percent.

The invention discloses a solar energy and electric energy combined heat pump system and a cooling and heating method. The heat pump system comprises a solar energy absorption heat pump unit, an intermediate work medium circulating device and a compression heat pump unit, wherein a solar drive absorption heat pump drives the absorption heat pump unit to prepare a lower-temperature intermediate work medium or higher-temperature intermediate work medium; the intermediate work medium bears partial / all cold energy / heat energy required by a user through first heat mass exchange equipment, and enters an intermediate heat exchanger of the compression heat pump unit for heat exchange; and the cold energy / heat energy contained in the intermediate work medium is recycled once again through the heat pump unit so as to save the electric consumption of the compressor of the compression heat pump unit. The system realizes high-efficiency utilization of a low-level renewable energy source solar energy, and has the advantages of stable and reliable operation, efficient energy utilization, good energy-saving effect and wild application prospect.

The invention provides a method and system for recovering the circulating water residual heat of thermal power plants. The system comprises an absorption type heat pump, a turbine, a condenser, a basic heat supply network heater, a peak heater, an auxiliary pipe, auxiliary equipment and a coordination control and protection system, wherein the absorption type heat pump is used for recovering the residual heat of circulating water of the condenser and heating return water of a main heat supply network; the basic heat supply network heater is used for heating the return water of the main heat supply network, which is heated by the absorption type heat pump; the peak heater is used for heating the return water of the main heat supply network, which is heated by the basic heat supply network heater and conveying the return water to users of the heat supply network; the auxiliary pipe is connected with the turbine, the condenser, the absorption type heat pump, the basic heat supply network heater, the peak heater and the auxiliary equipment; and the running and the safety of all equipment in the system are controlled by the coordination control and protection system. The invention has the advantages that heat which is discharged by the circulating water of the condenser to the air is recovered by the absorption type heat pump, the heating and steam extraction energy level of the thermal power plants is integrated, the energy of the thermal power plants is saved, and the heat supply capability and economy of the thermal power plants are improved.

The invention relates to fourth type heat pump cycle, which consists of a high-temperature absorber, a first condenser, a first throttling valve, a second condenser, a refrigerant liquid pump, an evaporator, an absorber, a first solution pump, a first solution heat exchanger, a second solution heat exchanger, a third solution heat exchanger, a second solution pump, an ejector and a plurality of generators. Jet type heat pump cycle and two types of absorption heat pump cycle are organically combined, so high-grade driving steam temperature difference and pressure difference are effectively utilized, high heat supply temperature and high-efficiency heat energy utilization ratio are obtained, high-grade driving steam can be efficiently utilized, smaller compression ratio and higher ejection coefficient are achieved, and the fourth type heat pump cycle is excellent in energy-saving efficiency as compared with the traditional heat supply method.

An energy conversion system including a high efficiency absorption heat pump cycle is disclosed using a high pressure stage, a supercritical cooling stage, and a mechanical energy extraction stage to provide a non-toxic combined heat, cooling, and energy system. Using the preferred carbon dioxide gas with partially miscible absorber fluids, including the preferred ionic liquids as the working fluid in the system, the present invention desorbs the CO.sub.2 from an absorbent and cools the gas in the supercritical state to deliver heat. The cooled CO.sub.2 gas is then expanded, preferably through an expansion device transforming the expansion energy into mechanical energy thereby providing cooling, heating temperature lift and electrical energy, and is returned to an absorber for further cycling. Strategic use of heat exchangers, preferably microchannel heat exchangers comprised of nanoscale powders and thermal-hydraulic compressor / pump can further increase the efficiency and performance of the system.

A heat activated (preferably natural gas, propane, solar or waste heat fired) absorption heat pump water heater and heat exchange system. The heat driven absorption heat pump system extracts low grade heat from the ambient air and produces high grade heat suitable for heating water for domestic, climate control or process purposes in a storage tank. Flue gases exiting the absorption heat pump system are further cooled by the heated water to enable high (condensing) combustion efficiencies. The heat activated heat pump water heating system achieves efficiencies of 150% or greater.

A waste heat recovery type hot-water boiler device in a bathroom comprises a boiler, an absorption type heat pump set, a sewage heat exchanger, a tap water preheater, a heat storage water tank, a sewage pool, a sewage filter, a water-feeding pump, a sewage pump, a circulating water pump and a boiler backwater pump. Water from a tap water pipeline is divided into two paths, wherein one path is normally supplied to the bathroom, and after being heated by the tap water preheater and the absorption type heat pump set, the other path is supplied as bath hot water; waste bath water collected by the sewage pool is discharged after heat exchange by the sewage heat exchanger; and circulating water in a water ring exchanges heat with the sewage in the sewage [heat] exchanger and flows through the tap water preheater and the absorption type heat pump set to exchange heat. The invention sufficiently utilizes the waste heat of waste bath water, reduces the fuel consumption, effectively utilizes primary energy sources, avoids wasting high-grade electric energy, is suitable for places needing hot bath water, such as hotels, schools, gymnasiums, hamams, and the like and belongs to the technical field of energy sources.

The invention belongs to the field of energy technology application, particularly relates to a heatpump type gas-fired boiler waste heat recovery unit. The unit comprises an absorption heat pump, a flue gas-water heat exchanger, a flue gas condensation heat exchanger, various connecting pipelines and accessories. The connecting pipelines comprise a first side pipeline, a middle water circulating pipeline and a second side pipeline. First side natural gas as a driving heat source enters a generator of the absorption heat pump and then enters the flue gas-water heat exchanger and the flue gas condensation heat exchanger with smoke exhausted by the gas fired boiler, the natural gas firstly passes through a water side circulating pipeline of the flue gas-water heat exchanger to heat second side return hot water and then exchanges heat with the generator side of the absorption heat pump to be as a low level heat source through the middle water circulating pipeline of the flue gas condensation pipeline, and the heat is transferred to a second side heating network by the absorption heat pump. The unit realizes cascade utilization for flue gas heat, greatly reduces the temperature of exhausted smoke, improves the energy utilization efficiency and is mainly used for gas-fired boiler waste heat recovery in a heating system.

The invention discloses a ship waste heat step utilization type cold-and-hot electric desalination four-cogeneration device which comprises a waste heat boiler system, an organic working medium Rankine cycle system, an absorption-type heat pump system, a seawater flash evaporation desalination system, a flue gas pipe cavity, a rotating shaft switcher and a generator. The organic working medium Rankine cycle system replaces a low-pressure stage waste heat boiler in a two-stage waste heat boiler system, and thus the heat-power conversion efficiency is effectively improved; the quantity of flue gas waste heat absorbed by seawater flash evaporation is increased, and the freshwater yield is effectively increased; first-stage flash evaporation saturated steam in the seawater flash evaporation desalination system is compressed into superheated steam through a turbine-driven steam compressor to be used for driving an absorption-type heat pump unit to operate; and thus the problem of corrosiondamage due to the fact that flue gas directly enters the absorption-type heat pump unit is effectively avoided while temperature adjustment in a ship cabin is achieved. A waste heat boiler, an organicworking medium Rankine cycle device, a seawater flash evaporation desalination device and an absorption-type heat pump device are matched, and thus the cold-and-hot electric desalination four-cogeneration effect of ship flue gas waste heat 350-80 DEG C step utilization is achieved.

An absorption heat pump, including: an evaporator which takes in a first heat source and evaporates refrigerant liquid into refrigerant vapor; an absorber which has a heat receiving medium passage and which takes in heat receiving medium liquid through a heat receiving medium inlet of the heat receiving medium passage, heats the heat receiving medium liquid with the heat of absorption generated when the refrigerant vapor generated in the evaporator is absorbed into solution, and discharges the heat receiving medium in the form of vapor or mixture of vapor and liquid through a heat receiving medium outlet of the heat receiving medium passage; a generator which takes in a second heat source and evaporates the refrigerant from the solution having absorbed the refrigerant vapor; and a condenser which takes in a cooling source and the refrigerant vapor generated in the generator to condense the refrigerant vapor.

The invention discloses a solar energy and geothermal energy assistant centralized heating system belonging to the technical field of centralized heating. A heating station is provided with a geothermal source adsorption heat pump unit, a centralized heating system once-network high-temperature hot water drives the adsorption heat pump, a soil source serves as the low-order heat source of the adsorption heat pump, heating medium adsorbs heat from earth and releases heat in a heat-pump evaporator, and adsorbed geothermy is used for secondary network heat supply. In order to restore soil temperature, the system adopts solar energy to serve as an assistant heat source; in the heating season, solar energy and geothermal energy mutually supplements; in the non-heating season, solar energy is independently used to recharge heat into ground so as to restore soil temperature and keep the soil temperature balanced in the whole year. The system takes the adsorption heat pump to replace a water-water heat exchanger and improves system heat supply amount by recovering environment heat; a solar energy soil heat accumulation mode is used for improving the utilization ration and system stability of the solar energy heat collector; and heat network water is used for driving the heat pump, thus saving a great quantity of electric power consumption, and lowering operation cost.

The invention relates to a large temperature rise absorption heat pump assembly capable of greatly improving the temperature of waste heat. The invention adopts the technical proposal of two-stage evaporation and two-stage absorption. The large temperature rise absorption heat pump assembly mainly comprises a generator, a condenser, a primary evaporator, a secondary evaporator, a primary absorber, a secondary absorber, a primary solution heat exchanger and a secondary solution heat exchanger. The invention is characterized in that: heat generated by the primary absorber is used as a heat source of the secondary evaporator, and the primary evaporator absorbs low-temperature waste heat from the heat source; and heat generated by the secondary absorber and the condenser is used for heat supply. The large temperature rise absorption heat pump assembly has the advantages of capability of absorbing the waste heat of low-temperature heat sources and capability of obtaining high-temperature heat supply hot water.

The invention discloses a second-class absorption heat pump system and a heating method of the second-class absorption heat pump system. The second-class absorption heat pump system comprises an evaporator, an absorber, a generator and a condenser, and further comprises a refrigerant heat exchanger, wherein a liquid refrigerant outlet of the condenser is communicated with a liquid refrigerant inlet of the evaporator through a first pipe, a liquid refrigerant outlet of the evaporator is communicated with a liquid refrigerant inlet of the condenser through a second pipe, the refrigerant heat exchanger comprises a first heat exchange tube and a second heat exchange tube, the first heat exchange tube and the second heat exchange tube can exchange heat with each other, the first heat exchange tube is connected to the first pipe in series, and the second heat exchange tube is connected to the second pipe in series. According to the structural design of the second-class absorption heat pump system, the problems that a second-class absorption heat pump system is low in energy utilization rate and temperature of a high-temperature heat source is low can be effectively solved.

The present invention discloses heat supply device for recovering latent heat of aqueous vapour in flue gas of fuel oil and fuel gas boiler fume, it includes boiler, condensation heat exchanger, heatsupply pipe and absorption heat pump composed of generator, solution exchanger, absorber, evaporator, condenser and connecting pipe; a part of the said condensation exchanger is set up in gas flue ofthe said boiler and its extended part is set up in the evaporator of absorption heat pump, the said heat supply pipe passes through the condense and the absorber of the said absorption heat pump.

The invention relates to a wind light-electric heat gas conversion module based multi-energy storage device coordination system and method and belongs to the technical field of energy. The system comprises a wind light-electric heat gas conversion module, a control module, a absorption refrigerator, an absorption heat pump, a compression refrigerator, a compression heat pump, a heat storage device, a cold storage device and a pipeline solenoid valve. The method includes: calculating real-time output-input power ratio of the system; acquiring current reserve of the cold storage device and the heat storage device and predicted electric energy production of a hydrogen storage device; controlling a relay set and the wind light-electric heat gas conversion module to perform system regulation according to the real-time output-input relationship parameter ratio and storage condition of the cold storage device, the heat storage device and the hydrogen storage device; controlling the pipeline solenoid valve, the compression refrigerator and the compression heat pump to work according to the energy storage condition of the heat storage device and the cold storage device. Diversified working modes can be provided according to different requirements; reasonable utilization of energy can be guaranteed, and the system can keep high efficiency and flexibility.

The invention provides a double-effect and triple-effect first-type absorption heat pump with a heat return end and a heat supply end, which belongs to the technical field of absorption heat pumps. A second absorber is sequentially communicated with a second solution pump, a third solution heat exchanger, a first absorber, a first solution pump, a second solution heat exchanger, a first solution heat exchanger and a first generator, the first generator is further sequentially communicated with the first solution heat exchanger, a second generator, the second solution heat exchanger, a third generator, the third solution heat exchanger and a second absorber, the first generator is provided with a steam channel used for communicating with the second generator and the third generator, the second generator is communicated with a condenser via a first throttling valve, the third generator is communicated with the condenser via a second throttling valve, the second generator is provided with a steam channel used for communicating with the condenser, the third generator is provided with a steam channel used for communicating with the first absorber, the condenser is communicated with an evaporator via a third throttling valve, and the evaporator is provided with a steam channel used for communicating with the second absorber, so that the double-effect first-type absorption heat pump with the heat return end and the heat supply end is formed.

The invention discloses marine seawater desalting method and equipment which couple a freezing method and a distilling method by utilizing an absorption type heat pump. The method comprises the steps of precooling-preheating, freezing-evaporating, washing-condensing, melting-condensing, and the like. According to the invention, because the novel cold and heat cogeneration seawater desalting method is realized by fully utilizing residual heat resources at different temperatures on a ship, the whole system is simple and feasible, is convenient for operation, can be used for optimally utilizing energy, has the characteristics of large desalted water output and high desalted water quality, is especially suitable for low-cost small-scale production on the ship and can be widely applied to the field of seawater desalting.

The invention provides a second-class absorption heat pump for heating from two ends and multiple ends, belonging to the residual heat utilization heat pump technology field. Aiming at two-step and multiple-step second-class absorption heat pump with heating from one end, the invention mainly adds absorber or / and changes absorber-evaporator device to composite absorbing-vaporizing device so as to realize heating from two ends or multiple ends to outside by added absorber or / and composite absorbing-vaporizing device with original heat pump absorber. In the basic method of adding absorber mainly, concentrated solution from absorber or from generator after it is decompressed by pressure reducing valve enters into new absorber to absorb cryogen steam from evaporator or absorbing-vaporizing device and providing heat to outside. In the basic method of changing absorber-evaporator to composite absorbing-vaporizing device, entered concentrated solution absorbs cryogen steam from evaporator or next-step absorbing-vaporizing device and provides heating to outside. Heat pump provided in the invention can take the place of linkage system constituted by different-step same heat pumps.

The invention provides a thermoelectricity co-generation energy-saving device for supplying heat by using waste heat and an energy-saving method thereof. The device comprises a steam boiler, a turbine, an electric generator, a steam condenser, a deaerator and a cooling tower, wherein the turbine is connected with the steam condenser by an exhaust hood, and the steam condenser is connected with the cooling tower to form a big circulation of waterway; the device also comprises a waste heat utilization hot water heater comprising an absorbing type heat pump and a heat exchanger; a steam inlet of the absorbing type heat pump is connected with an extraction opening of the turbine, a water inlet of the absorbing type heat pump is connected with a water returning end of a hot water pipe network, and the steam condenser, absorbing type heat pump and cooling tower are connected to form a small circulation of waterway; a steam inlet of the heat exchanger is connected with the extraction opening of the turbine, a water inlet end of the heat exchanger is connected with a water outlet end of the absorbing type heat pump, and the water outlet end of the heat exchanger is connected with a water inlet end of the hot water pipe network; and the water drainage ends of the heat exchanger and the absorbing type heat pump are joined and then connected to the deaerator. The device of the invention has the advantages of reducing loss of a cold source, improving comprehensive heat efficiency and electric heating ratio and lowering coal consumption of the machine set in power generation.