CN112923425A - Solar energy coupling biomass village and town building energy supply system based on phase change energy storage - Google Patents
Solar energy coupling biomass village and town building energy supply system based on phase change energy storage Download PDFInfo
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- CN112923425A CN112923425A CN202110271071.5A CN202110271071A CN112923425A CN 112923425 A CN112923425 A CN 112923425A CN 202110271071 A CN202110271071 A CN 202110271071A CN 112923425 A CN112923425 A CN 112923425A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D12/00—Other central heating systems
- F24D12/02—Other central heating systems having more than one heat source
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D11/00—Central heating systems using heat accumulated in storage masses
- F24D11/002—Central heating systems using heat accumulated in storage masses water heating system
- F24D11/003—Central heating systems using heat accumulated in storage masses water heating system combined with solar energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
- F24D19/1075—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water the system uses solar energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/06—Solid fuel fired boiler
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/14—Solar energy
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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Abstract
The invention discloses a phase-change energy storage-based solar energy coupling biomass energy supply system for villages and small towns buildings, which comprises a solar heat collector, a biomass combustion furnace, a phase-change heat storage device, a water heat exchanger, a heating heat exchanger, a water pump, a temperature sensor and an on-off valve. The invention couples solar energy, phase change heat storage and biomass energy, fully and reasonably utilizes the solar energy, takes the biomass combustion furnace as energy supplement, has stable heat supply, preferentially utilizes the solar energy in principle, then utilizes the heat storage energy, and finally considers the biomass energy, realizes reasonable regulation and control of the energy, realizes heat supply of various operation strategies, and ensures that hot water and heating are provided for a user end in the whole time period. The phase-change heat storage device adopts phase-change materials with different phase-change temperatures to realize partitioned heat storage, so that the heat storage is more reasonable, and energy is not wasted.
Description
Technical Field
The invention belongs to the field of energy and environment, and particularly relates to a solar energy coupling biomass village and town building energy supply system based on phase change energy storage.
Background
The modern heat supply mainly uses non-renewable fossil fuels as energy sources, and along with the continuous reduction of fossil energy sources and the continuous aggravation of environmental pollution problems, the environmental awareness of people is increasingly strengthened, so that the use of renewable energy sources and green energy sources becomes an important research direction of modern energy sources.
Solar energy is the most abundant permanent energy in the world and has the advantages of universality, harmlessness, immense and long-term use. Roughly calculated, the energy obtained by the earth can reach 173,000TW, that is, the energy irradiated to the earth by the sun every second is equivalent to 500 ten thousand tons of coal, and the energy irradiated to the earth every second is 1.465 x 1014J. But simultaneously, solar energy has the defect of instability, and when the solar energy meets cloudy and rainy weather or at night, the energy flux density of the solar energy becomes very low, so that the solar energy is not beneficial to collection and use. At present, two solar energy utilization methods are available: photovoltaic and photothermal. The photovoltaic conversion utilizes a power generation device to convert solar energy into electric energy, and has the advantages of high grade of electric energy and low conversion efficiency; the photo-thermal technology converts solar energy into heat energy by using a heat collecting device, and has the advantages of relatively high conversion efficiency and low grade of heat energy.
The biomass energy is energy provided by living plants in nature, and the plants store solar energy by taking the biomass as a medium, and belong to renewable energy sources. Biomass energy is always an important energy source on which human beings rely to live, is second only to the fourth energy source of coal, petroleum and natural gas, which is the world energy consumption amount, and plays an important role in the whole energy system. The energy stored by biomass is calculated to be 2 times greater than the total energy consumption in the world at present. Thus, biomass energy is highly likely to become a component of future sustainable energy systems. At present, there are three means for utilizing biomass energy: direct combustion, thermochemical conversion and biochemical conversion. The reasonable application of biomass energy can effectively provide clean, cheap and comfortable heat supply environment for rural areas as areas producing a large amount of biomass raw materials. Even when the biomass energy is used in a large amount, the processing and industrialization of the biomass raw materials can possibly drive the rural economic development.
Phase change energy storage is an energy storage technology based on phase change energy storage materials and mainly comprises thermochemistry heat storage, sensible heat storage and phase change heat storage. The heat storage technology is an important technology for improving energy utilization efficiency and protecting the environment, can be used for solving the contradiction of mismatch between heat energy supply and demand, and has wide application prospects in the fields of solar energy utilization, electric power peak load shifting, waste heat and waste heat recycling, energy conservation of industrial and civil buildings and air conditioners and the like. The phase-change heat storage is a technology for storing energy by utilizing the principle that substances absorb or release latent heat of phase change in the processes of solidification/melting, condensation/gasification, desublimation/sublimation and other forms of phase change, and has the advantages of large heat storage capacity and constant heat release temperature.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a solar energy coupling biomass village and town building energy supply system based on phase change energy storage.
The technical scheme for solving the technical problems is that the invention provides a phase-change energy storage based solar energy coupling biomass village and town building energy supply system, which is characterized by comprising a solar heat collector, a biomass combustion furnace, a phase-change heat storage device, a water heat exchanger, a heating heat exchanger, a water pump, a temperature sensor and an on-off valve;
the phase change heat storage device comprises a high-temperature heat storage area and a low-temperature heat storage area; a third temperature sensor is arranged in the high-temperature heat storage area and used for measuring the temperature of the high-temperature heat storage area; a fourth temperature sensor is arranged in the low-temperature phase change region and used for measuring the temperature of the low-temperature heat storage region; a fifth temperature sensor and user side heating equipment are arranged in the user room; the fifth temperature sensor is used for detecting the indoor temperature;
a first temperature sensor is arranged at an outlet of the solar heat collector and used for measuring the temperature of a working medium at the outlet of the solar heat collector; a first on-off valve is arranged on an outlet pipeline of the solar heat collector, the tail end of the pipeline is divided into two branches, a seventh on-off valve is arranged on one branch, and the tail end of the seventh on-off valve is connected with a working medium inlet of the water heat exchanger; the tail end of the branch is communicated with an outlet pipeline of the biomass combustion furnace, and a connecting point is positioned behind the on-off valve II according to the fluid flowing direction; a working medium outlet pipeline of the water heat exchanger is communicated with an inlet pipeline of the solar heat collector; a first water pump is arranged on an inlet pipeline of the solar heat collector;
a second temperature sensor is arranged at the outlet of the biomass combustion furnace and used for measuring the temperature of the working medium at the outlet of the biomass combustion furnace; an on-off valve II is arranged on an outlet pipeline of the biomass combustion furnace, the tail end of the pipeline is divided into two branches, an on-off valve eighth is arranged on one branch, the tail end of the on-off valve eighth is connected with a working medium inlet of the heating heat exchanger, and an on-off valve sixth is arranged on the other branch, and the tail end of the on-off valve sixth is connected with a first working medium inlet of the high-temperature heat storage area;
the working medium outlet pipeline of the heating heat exchanger is divided into two primary branches, one primary branch is provided with a fourth water pump, the tail end of the fourth water pump is connected with a second working medium inlet of the high-temperature heat storage area, the other primary branch is provided with an on-off valve nine, the tail end of the second branch is divided into two secondary branches, one secondary branch is provided with an on-off valve four, the tail end of the second branch is connected with a working medium inlet of the low-temperature heat storage area, the other secondary branch is provided with an on-off valve three, the tail end of the second branch is divided into two tertiary branches, the tail end of one tertiary branch is communicated with the inlet pipeline of; a second water pump is arranged on an inlet pipeline of the biomass combustion furnace;
the tail end of a first working medium outlet pipeline of the high-temperature heat storage area is connected with a primary branch with an on-off valve nine, and a connecting point is positioned behind the on-off valve nine according to the fluid flowing direction; the first working medium outlet of the high-temperature heat storage area is communicated with the first working medium inlet of the high-temperature heat storage area through a pipeline provided with a cut-off valve fifteen; the tail end of a working medium outlet pipeline of the low-temperature heat storage area is communicated with a secondary branch with a third on-off valve, and a connecting point is positioned behind the third on-off valve according to the fluid flowing direction; a second working medium outlet of the high-temperature heat storage area is connected with a working medium inlet of the heating heat exchanger through a pipeline, and a switch valve is arranged on the pipeline;
the tail end of a pipeline externally connected with a tap water source is divided into two paths, one path is provided with a third water pump, the tail end of the third water pump is connected with a water inlet of the low-temperature phase change region, and the other path is connected with a water inlet of the water-using heat exchanger; the water outlet of the low-temperature phase change region is connected with user-side domestic hot water equipment through a pipeline, and an on-off valve eleven is arranged on the pipeline; the water outlet of the water heat exchanger is connected with user-side domestic hot water equipment through a pipeline, and a switch valve twelve is arranged on the pipeline;
an outlet of the user side heating equipment is connected with a heating fluid inlet of the heating heat exchanger through a pipeline, and a fifth water pump is arranged on the pipeline; the inlet of the user side heating equipment is connected with the heating fluid outlet of the heating heat exchanger through a pipeline, and the pipeline is provided with a fourteen on-off valve.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention couples solar energy, phase change heat storage and biomass energy, fully and reasonably utilizes the solar energy, takes the biomass combustion furnace as energy supplement, has stable heat supply, preferentially utilizes the solar energy in principle, then utilizes the heat storage energy, and finally considers the biomass energy, realizes reasonable regulation and control of the energy, realizes heat supply of various operation strategies, and ensures that hot water and heating are provided for a user end in the whole time period.
(2) The phase-change heat storage device adopts phase-change materials with different phase-change temperatures to realize partitioned heat storage, so that the heat storage is more reasonable, and energy is not wasted.
(3) The off-peak electricity is utilized to assist in heat supply, so that the stability of a power grid is facilitated, the electricity fee is saved to a certain degree, and the efficient utilization of heat is realized.
(4) The energy is green, clean and environment-friendly, biomass energy is changed into wealth, and meanwhile, a biomass particle factory can be arranged in a village and town in a matching way, so that economic internal circulation is realized.
(5) The phase change heat storage device can be arranged underground, does not occupy the ground space, and has a certain heat preservation function underground.
Drawings
FIG. 1 is a schematic diagram of the overall system of the present invention;
fig. 2 is a schematic structural view of the phase change thermal storage device of the present invention.
In the figure: 1. a solar heat collector; 2. a biomass combustion furnace; 3. a phase change thermal storage device; 4. a water heat exchanger; 5. a heating heat exchanger; 6. a user end domestic hot water device; 7. a user side heating device;
31. a high temperature heat storage zone; 32. a thermal insulation layer; 33. a low temperature heat storage region;
81. a first water pump; 82. a second water pump; 83. a third water pump; 84. a fourth water pump; 85. a fifth water pump;
91. a first temperature sensor; 92. a second temperature sensor; 93. a third temperature sensor; 94. a fourth temperature sensor; 95. a fifth temperature sensor;
101. a first on-off valve; 102. a second on-off valve; 103. a third on-off valve; 104. a fourth on-off valve; 105. a fifth on-off valve; 106. a sixth on-off valve; 107. a seventh on-off valve; 108. an on-off valve eighth; 109. a ninth on-off valve; 110. a switch valve ten; 111. an on-off valve eleven; 112. a on-off valve twelve; 113. a thirteen on-off valve; 114. a fourteen on-off valve; 115. and a fifteen on-off valve.
Detailed Description
Specific examples of the present invention are given below. The specific examples are only intended to illustrate the invention in further detail and do not limit the scope of protection of the claims of the present application.
The invention provides a phase-change energy storage-based solar energy coupling biomass energy supply system (energy supply system for short) for villages and small towns buildings, which is characterized by comprising a solar heat collector 1, a biomass combustion furnace 2, a phase-change heat storage device 3, a water heat exchanger 4, a heating heat exchanger 5, a water pump, a temperature sensor and an on-off valve;
the phase change heat storage device 3 comprises a high-temperature heat storage area 31 and a low-temperature heat storage area 33; a third temperature sensor 93 for measuring the temperature T of the high-temperature heat storage region 31 is provided in the high-temperature heat storage region 313(ii) a The low temperature phase change region 33 is provided with a fourth temperature sensor 94 for measuring the temperature T of the low temperature heat storage region 334(ii) a A fifth temperature sensor 95, a user side domestic hot water device 6 and a user side heating device 7 are arranged in the user room; the fifth temperature sensor 95 is used for monitoring the indoor temperature T5；
A first temperature sensor 91 is arranged at the outlet of the solar heat collector 1 and used for measuring the working medium temperature T at the outlet of the solar heat collector1(ii) a An on-off valve I101 is arranged on an outlet pipeline of the solar heat collector 1, the tail end of the pipeline is divided into two branches, an on-off valve VII 107 is arranged on one branch, and the tail end of the branch is connected with a working medium inlet of the water heat exchanger 4; the other branch is provided with a fifth on-off valve 105, the tail end of the branch is communicated with an outlet pipeline of the biomass combustion furnace 2, and a connecting point is positioned behind the second on-off valve 102 according to the fluid flowing direction; the working medium outlet pipeline of the water heat exchanger 4 is communicated with the inlet pipeline of the solar heat collector 1; a first water pump 81 is arranged on an inlet pipeline of the solar heat collector 1;
the outlet of the biomass combustion furnace 2 is provided with a second temperature sensor 92 for measuring the working medium temperature T at the outlet of the biomass combustion furnace2(ii) a An on-off valve II 102 is arranged on an outlet pipeline of the biomass combustion furnace 2, the tail end of the pipeline is divided into two branches, an on-off valve II 108 is arranged on one branch, the tail end of the branch is connected with a working medium inlet of the heating heat exchanger 5, an on-off valve VI 106 is arranged on the other branch, and the tail end of the branch is connected with a first working medium inlet of the high-temperature heat storage area 31;
the working medium outlet pipeline of the heating heat exchanger 5 is divided into two primary branches, one primary branch is provided with a fourth water pump 84, the tail end of the fourth water pump is connected with a second working medium inlet of the high-temperature heat storage area 31, the other primary branch is provided with an on-off valve nine 109, the tail end of the second branch is divided into two secondary branches, one secondary branch is provided with an on-off valve four 104, the tail end of the second branch is connected with a working medium inlet of the low-temperature heat storage area 33, the other secondary branch is provided with an on-off valve three 103, the tail end of the second branch is divided into two tertiary branches, the tail end of one tertiary branch is communicated with the inlet pipeline of the solar; a second water pump 82 is arranged on an inlet pipeline of the biomass combustion furnace 2;
a first working medium outlet pipeline of the high-temperature heat storage area 31 is connected with a primary branch with an on-off valve nine 109, and a connection point is positioned behind the on-off valve nine 109 according to the fluid flowing direction; the first working medium outlet of the high-temperature heat storage area 31 is communicated with the first working medium inlet of the high-temperature heat storage area 31 through a pipeline provided with a cut-off valve fifteen 115; the tail end of a working medium outlet pipeline of the low-temperature heat storage area 33 is communicated with a secondary branch with a third on-off valve 103, and a connecting point is positioned behind the third on-off valve 103 according to the fluid flowing direction; a second working medium outlet of the high-temperature heat storage area 31 is connected with a working medium inlet of the heating heat exchanger 5 through a pipeline, and an on-off valve ten 110 is arranged on the pipeline;
the tail end of the pipeline externally connected with a tap water source is divided into two paths, one path is provided with a third water pump 83, the tail end of the third water pump is connected with the water inlet of the low-temperature phase change region 33, and the other path is connected with the water inlet of the water heat exchanger 4; the water outlet of the low-temperature phase change region 33 is connected with the user-side domestic hot water equipment 6 through a pipeline, and an on-off valve eleven 111 is arranged on the pipeline; the water outlet of the water heat exchanger 4 is connected with the user-side domestic hot water equipment 6 through a pipeline, and an on-off valve twelve 112 is arranged on the pipeline;
an outlet of the user side heating equipment 7 is connected with a heating fluid inlet of the heating heat exchanger 5 through a pipeline, and a fifth water pump 85 is arranged on the pipeline; the inlet of the user side heating equipment 7 is connected with the heating fluid outlet of the heating heat exchanger 5 through a pipeline, and the pipeline is provided with an on-off valve fourteen 114.
Preferably, the phase change heat storage device 3 further includes a thermal insulation layer 32; the high-temperature heat storage area 31 and the low-temperature heat storage area 33 are integrated into a whole structure, the middle part of the whole structure is separated by a heat insulation layer 32 to avoid heat exchange between the high-temperature heat storage area 31 and the low-temperature heat storage area 33, and the outer side of the whole structure is subjected to heat preservation and packaging by a heat insulation layer; the heat insulation layer is made of heat insulation materials to reduce heat dissipation loss;
the inner side of the heat insulation layer of the phase change heat storage device 3 is provided with a corrosion resistant shell, and the outer side is provided with a waterproof layer; the corrosion-resistant shell is formed by welding high-temperature-resistant stainless steel, and the waterproof layer is made of waterproof materials to prevent moisture.
The solar heat collector 1 adopts the Qinghua purple light QH 58-1800-50; the biomass combustion furnace 2 adopts a Xin city sunshine generating biomass particle heating furnace 300; the water heat exchanger 4 adopts a Lubens brazing plate type heat exchanger; the phase change temperature range of the phase change material in the high-temperature phase change region 31 is 45-65 ℃; the phase change temperature range of the phase change material in the low-temperature phase change region 33 is 35-45 ℃; the heating heat exchanger 5 adopts a Lubens brazing plate type heat exchanger; the water pump is referenced to Hengger ORSxx-16G; the temperature sensor reference Asmik WZP-PT 100; all on-off valves adopt SAN YE three-blade 2W-040-10 electromagnetic valves;
the thermal insulation layer 32 adopts a vacuum-pumping technology or is filled with a thermal insulation material to avoid heat exchange between the high-temperature phase change region 31 and the low-temperature phase change region 33;
preferably, the first temperature sensor 91, the second temperature sensor 92, the third temperature sensor 93, the fourth temperature sensor 94 and the fifth temperature sensor 95 are connected with an input end of an automatic control system, signals of the input ends are transmitted to an output end of the automatic control system through a central processing unit, and an output end of the automatic control system is connected with the biomass combustion furnace 2, the first water pump 81, the second water pump 82, the third water pump 83, the fourth water pump 84, the fifth water pump 85, the first on-off valve 101, the second on-off valve 102, the third on-off valve 103, the fourth on-off valve 104, the fifth on-off valve 105, the sixth on-off valve 106, the seventh on-off valve 107, the eighth on-off valve 108, the ninth on-off valve 109, the tenth on-off valve 110, the eleventh on-off valve 111, the twelfth on-off valve 112, the thirteenth on-off valve 113 and the fourteenth on-off valve 114.
The working principle and the working process of the invention are as follows: the heat supply comprises user hot water supply and user heating;
the principle is as follows: during working, working media sequentially flow through an outlet of the solar heat collector 1, the first temperature sensor 91, the first on-off valve 101, the seventh on-off valve 107, the water heat exchanger 4, the first water pump 81 and an inlet of the solar heat collector 1 to complete direct heat working medium circulation;
working media sequentially flow through an outlet of the solar heat collector 1, a first temperature sensor 91, a first on-off valve 101, a fifth on-off valve 105, a sixth on-off valve 106, a high-temperature heat storage area 31, a fourth on-off valve 104, a low-temperature heat storage area 33, a first water pump 81 and an inlet of the solar heat collector 1 to complete solar energy-high temperature-low temperature heat storage circulation;
working media sequentially flow through an outlet of the solar heat collector 1, a first temperature sensor 91, a first on-off valve 101, a fifth on-off valve 105, an eighth on-off valve 108, a heating heat exchanger 5, a ninth on-off valve 109, a fourth on-off valve 104, a low-temperature heat storage area 33, a first water pump 81 and an inlet of the solar heat collector 1 to complete solar energy-heating-low-temperature heat storage circulation;
working media sequentially flow through an outlet of the solar heat collector 1, a first temperature sensor 91, a first on-off valve 101, a fifth on-off valve 105, a fifteenth on-off valve 115, a fourth on-off valve 104, a low-temperature heat storage area 33, a first water pump 81 and an inlet of the solar heat collector 1 to complete solar-low-temperature heat storage circulation;
working media sequentially flow through an outlet of the biomass combustion furnace 2, a second temperature sensor 92, a second on-off valve 102, an eighth on-off valve 108, a heating heat exchanger 5, a ninth on-off valve 109, a fourth on-off valve 104, a low-temperature heat storage area 33, a second water pump 82 and an inlet of the biomass combustion furnace 2 to complete biomass-heating-low-temperature heat storage circulation;
the working medium sequentially flows through a first working medium outlet of the high-temperature heat storage area 31, a fourth on-off valve 104, a low-temperature heat storage area 33, a second water pump 82, the biomass combustion furnace 2, a second temperature sensor 92, a second on-off valve 102, a sixth on-off valve 106 and a first working medium inlet of the high-temperature heat storage area 31, and high-temperature-low-temperature heat storage circulation is completed;
working media sequentially flow through an outlet of the biomass combustion furnace 2, a second temperature sensor 92, a second on-off valve 102, an eighth on-off valve 108, a heating heat exchanger 5, a ninth on-off valve 109, a third on-off valve 103, a second water pump 82 and an inlet of the biomass combustion furnace 2 to complete biomass heating circulation;
working media sequentially flow through an outlet of the biomass combustion furnace 2, a second temperature sensor 92, a second on-off valve 102, a fifteenth on-off valve 115, a fourth on-off valve 104, a low-temperature phase change region 33, a second water pump 82 and an inlet of the biomass combustion furnace 2 to complete biomass-low-temperature heat storage circulation;
the water flow sequentially flows through an on-off valve thirteen 113, a water heat exchanger 4 and an on-off valve twelve 112 to the user-side domestic hot water equipment 6, so that the direct hot water supply is completed;
the water flow sequentially flows through the on-off valve thirteen 113, the third water pump 83, the low-temperature phase change region 33 and the on-off valve eleven 111 to the user-side domestic hot water equipment 6, and the heat storage hot water supply is completed;
the working medium flows through the second working medium outlet of the high-temperature phase change region 31, the on-off valve ten 110, the heating heat exchanger 5, the fourth water pump 84 and the second working medium inlet of the high-temperature phase change region 31 in sequence to complete heat storage and heating circulation;
the working medium flows through the outlet of the user side heating equipment 7, the fifth water pump 85, the heating heat exchanger 5 and the on-off valve fourteen 114 to the inlet of the user side heating equipment 7, and the heating supply of the user is completed.
The working process is as follows:
working condition one, heating season (generally 11 months and 15 days to next year, 3 months and 15 days): the energy supply system simultaneously supports hot water supply and heating of users, and the energy utilization sequence is solar energy, heat storage output and biomass; at the moment, the first on-off valve 101, the thirteen on-off valve 113, the fourteen on-off valve 114 and the fifth water pump 85 are normally open; the first temperature sensor 91, the second temperature sensor 92, the third temperature sensor 93, the fourth temperature sensor 94 and the fifth temperature sensor 95 are normally open; the biomass combustion furnace 2 is closed by default, if the biomass combustion furnace is opened, the biomass combustion furnace is operated at low power in the peak section (8:00-22:00) of peak-valley electricity, and the biomass combustion furnace is operated at high power in the valley section (22: 00-8: 00 of the next day);
first, when the indoor temperature is lower than the winter indoor design temperature, T5When the temperature is less than 18 ℃, the energy supply system needs to supply domestic hot water and heat to the user side at the same time:
1. when the sun shines well, the solar energy is sufficient, namely T1When the temperature is higher than 55 ℃, the solar heat collector 1 independently supplies domestic hot water and heat to a user side, and simultaneously stores heat to the high-temperature heat storage area 31 and the low-temperature heat storage area 33; at the moment, the fourth on-off valve 104, the fifth on-off valve 105, the sixth on-off valve 106, the seventh on-off valve 107, the eighth on-off valve 108, the ninth on-off valve 109, the twelfth on-off valve 112 and the first water pump 81 are opened; closing the second on-off valve 102, the third on-off valve 103, the tenth on-off valve 110, the eleventh on-off valve 111, the fifteenth on-off valve 115, the second water pump 82, the third water pump 83 and the fourth water pump 84;
the hot fluid working medium carries heat and outputs heat from an outlet of the solar heat collector 1 to the water heat exchanger 4 through the first temperature sensor 91, the first on-off valve 101 and the seventh on-off valve 107, and the cold fluid working medium after heat exchange is returned to an inlet of the solar heat collector 1 through the first water pump 81 to complete direct hot working medium circulation; tap water enters the water heat exchanger 4 through the on-off valve thirteen 113 to be heated, and hot water flowing out of the water heat exchanger 4 is sent to the user-side domestic hot water equipment 6 through the on-off valve twelve 112 to complete direct hot water supply; the fluid carries heat to exchange heat from the outlet of the solar thermal collector 1 to the high-temperature heat storage area 31 through the first temperature sensor 91, the first on-off valve 101, the fifth on-off valve 105 and the sixth on-off valve 106, the fluid after heat exchange exchanges heat from the fourth on-off valve 104 to the low-temperature heat storage area 33, and the low-temperature fluid after heat exchange returns to the inlet of the solar thermal collector 1 through the first water pump 81 to complete the solar-high-low temperature heat storage cycle; the fluid carries heat to exchange heat from the outlet of the solar heat collector 1 to the heating heat exchanger 5 through the first temperature sensor 91, the first on-off valve 101, the fifth on-off valve 105 and the eighth on-off valve 108, the fluid after heat exchange exchanges heat from the low-temperature heat storage area 33 through the ninth on-off valve 109 and the fourth on-off valve 104, and the low-temperature fluid after heat exchange returns to the solar heat collector 1 through the first water pump 81 to complete the solar energy-heating-low-temperature heat storage cycle; at this time, the user side heating working medium takes heat from the heating heat exchanger 5 through the fifth water pump 85 and is sent to the user side heating equipment 7 through the shutoff valve fourteen 114 to complete user heating supply;
2. when the solar energy is insufficient in rainy days or nights, the temperature is lower than 45 DEG C1When the temperature is lower than 55 ℃, the solar heat collector 1 independently supplies domestic hot water to a user end and simultaneously stores heat to the low-temperature heat storage area 33; at the moment, the fourth on-off valve 104, the fifth on-off valve 105, the seventh on-off valve 107, the eleventh on-off valve 111, the twelfth on-off valve 112, the fifteenth on-off valve 115 and the first water pump 81 are opened; the third on-off valve 103, the sixth on-off valve 106 and the third water pump 83 are closed;
the hot fluid working medium carries heat and outputs heat from an outlet of the solar heat collector 1 to the water heat exchanger 4 through the first temperature sensor 91, the first on-off valve 101 and the seventh on-off valve 107, and the cold fluid working medium after heat exchange is returned to an inlet of the solar heat collector 1 through the first water pump 81 to complete direct hot working medium circulation; tap water enters the water heat exchanger 4 through the on-off valve thirteen 113 to be heated, and hot water flowing out of the water heat exchanger 4 is sent to the user-side domestic hot water equipment 6 through the on-off valve twelve 112 to complete direct hot water supply; the fluid carries heat to exchange heat from the outlet of the solar heat collector 1 to the low-temperature heat storage area 33 through the first temperature sensor 91, the first on-off valve 101, the fifth on-off valve 105, the fifteenth on-off valve 115 and the fourth on-off valve 104, and the low-temperature fluid after heat exchange returns to the inlet of the solar heat collector 1 through the first water pump 81 to complete the solar-low-temperature heat storage cycle;
(1) when T is3When the temperature is higher than 55 ℃, the high-temperature heat storage area 31 supplies heat to the user side heating equipment 7; at this time, the second on-off valve 102, the second on-off valve 108, the third on-off valve 109 and the second water pump 82 are closed;
the fluid gets heat from the heating heat exchanger 5 to the high-temperature heat storage area 31 through the fourth water pump 84, and the fluid after heat exchange exchanges heat to the heating heat exchanger 5 through the break valve ten 110 to complete heat storage heating circulation; at this time, the user side heating working medium takes heat from the heating heat exchanger 5 through the outlet of the user side heating equipment 7 by the fifth water pump 85 and is sent to the inlet of the user side heating equipment 7 by the shutoff valve fourteen 114 to complete the user heating supply;
(2) when T is3When the temperature is lower than 55 ℃, the biomass combustion furnace 2 operates, and the second on-off valve 102, the eighth on-off valve 108, the ninth on-off valve 109 and the second water pump 82 are opened; the on-off valve ten 110 and the fourth water pump 84 are closed;
the fluid carries heat from the outlet of the biomass combustion furnace 2, passes through the second temperature sensor 92, the second on-off valve 102 and the eighth on-off valve 108, exchanges heat with the heating heat exchanger 5, passes through the ninth on-off valve 109 and the fourth on-off valve 104, exchanges heat with the low-temperature heat storage area 33, and returns to the biomass combustion furnace 2 through the second water pump 82 to complete the biomass-heating-low-temperature heat storage cycle; at this time, the user side heating working medium takes heat from the heating heat exchanger 5 through the fifth water pump 85 and is sent to the user side heating equipment 7 through the shutoff valve fourteen 114 to complete user heating supply;
3. when the day is continuously cloudy, T1When the temperature is lower than 45 ℃, the first on-off valve 111 and the third water pump 83 are opened, and the fifth on-off valve 105, the seventh on-off valve 107, the twelfth on-off valve 112 and the first water pump 81 are closed;
(1) when T is3When the temperature is higher than 55 ℃, the low-temperature heat storage area 33 supplies heat to the user-side domestic hot water equipment 6, and the high-temperature heat storage area 31 supplies heat to the user-side heating equipment 7; at this time, the second on-off valve 102, the fourth on-off valve 104, the sixth on-off valve 106, the tenth on-off valve 110, the eleventh on-off valve 111, the second water pump 82 and the fourth water pump 84 are opened, and the third on-off valve 103, the eighth on-off valve 108, the ninth on-off valve 109 and the 115 are closed;
high-temperature fluid flows out of the high-temperature heat storage area 31, supplies heat to the low-temperature heat storage area 33 through the fourth on-off valve 104, flows out after heat exchange, returns to the high-temperature heat storage area 31 through the second water pump 82, the biomass combustion furnace 2 (unburned), the second temperature sensor 92, the second on-off valve 102 and the sixth on-off valve 106, and completes high-temperature-low-temperature heat storage circulation; the fluid gets heat from the high-temperature heat storage area 31 through the fourth water pump 84, and the fluid after heat exchange exchanges heat from the heat exchanger 5 through the break valve ten 110 to complete heat storage and heating circulation; at this time, the user side heating working medium takes heat from the heating heat exchanger 5 through the fifth water pump 85 and is sent to the user side heating equipment 7 through the shutoff valve fourteen 114 to complete user heating supply; tap water enters the low-temperature heat storage area 33 through the on-off valve thirteen 113 and the third water pump 83 to be heated, and hot water from the low-temperature heat storage area 33 is sent to the user-side domestic hot water equipment 6 through the on-off valve eleven 111 to complete heat storage hot water supply;
(2) when T is3When the temperature is lower than 55 ℃, the biomass combustion furnace 2 runs, the second on-off valve 102, the eighth on-off valve 108, the ninth on-off valve 109, the eleventh on-off valve 111, the second water pump 82 and the third water pump 83 are opened, and the sixth on-off valve 106, the tenth on-off valve 110, the fifteenth on-off valve 115 and the fourth water pump 84 are closed;
when T4When the temperature is higher than 45 ℃, the fourth on-off valve 104 is closed, and the third on-off valve 103 is opened;
the fluid carries heat to exchange heat from the outlet of the biomass combustion furnace 2 through a second temperature sensor 92, a second on-off valve 102 and an eighth on-off valve 108 to the heating heat exchanger 5, and then flows back to the biomass combustion furnace 2 through a ninth on-off valve 109, a third on-off valve 103 and a second water pump 82 to complete biomass heating circulation; at this time, the user side heating working medium takes heat from the heating heat exchanger 5 through the fifth water pump 85 and is sent to the user side heating equipment 7 through the shutoff valve fourteen 114 to complete user heating supply; tap water enters the low-temperature heat storage area 33 through the on-off valve thirteen 113 and the third water pump 83 to be heated, and hot water from the low-temperature heat storage area 33 is sent to the user-side domestic hot water equipment 6 through the on-off valve eleven 111 to complete heat storage hot water supply;
when T4When the temperature is lower than 45 ℃, the third on-off valve 103 is closed, and the fourth on-off valve 104 is opened;
the fluid carries heat from the outlet of the biomass combustion furnace 2 to the heating heat exchanger 5 through the second temperature sensor 92, the second on-off valve 102 and the eighth on-off valve 108 for heat exchange, then to the low-temperature heat storage area 33 through the ninth on-off valve 109 and the fourth on-off valve 104 for heat exchange, and then to the biomass combustion furnace 2 through the second water pump 82 for heat exchange to complete the biomass-heating-low-temperature heat storage cycle; at this time, the user side heating working medium takes heat from the heating heat exchanger 5 through the fifth water pump 85 and is sent to the user side heating equipment 7 through the shutoff valve fourteen 114 to complete user heating supply; tap water enters the low-temperature heat storage area 33 through the on-off valve thirteen 113 and the third water pump 83 to be heated, and hot water from the low-temperature heat storage area 33 is sent to the user-side domestic hot water equipment 6 through the on-off valve eleven 111 to complete heat storage hot water supply;
second, when the indoor temperature is too high, T5When the temperature is higher than 25 ℃, additional heat supply is not needed to the user side heating equipment 7, and at the moment, the eight on-off valve 108, the nine on-off valve 109, the ten on-off valve 110 and the fourth water pump 84 are closed;
1. when the sun shines well, the solar energy is sufficient, namely T1When the temperature is higher than 55 ℃, the solar heat collector 1 independently supplies domestic hot water to a user end, and simultaneously stores heat to the high-temperature heat storage area 31 and the low-temperature heat storage area 33; at the moment, the fourth on-off valve 104, the fifth on-off valve 105, the sixth on-off valve 106, the seventh on-off valve 107, the twelfth on-off valve 112 and the first water pump 81 are opened; closing the second on-off valve 102, the third on-off valve 103, the eleventh on-off valve 111, the fifteenth on-off valve 115, the second water pump 82 and the third water pump 83;
the hot fluid working medium carries heat and outputs heat from an outlet of the solar heat collector 1 to the water heat exchanger 4 through the first temperature sensor 91, the first on-off valve 101 and the seventh on-off valve 107, and the cold fluid working medium after heat exchange is returned to an inlet of the solar heat collector 1 through the first water pump 81 to complete direct hot working medium circulation; tap water enters the water heat exchanger 4 through the on-off valve thirteen 113 to be heated, and hot water flowing out of the water heat exchanger 4 is sent to the user-side domestic hot water equipment 6 through the on-off valve twelve 112 to complete direct hot water supply; the fluid carries heat to exchange heat from the outlet of the solar thermal collector 1 to the high-temperature heat storage area 31 through the first temperature sensor 91, the first on-off valve 101, the fifth on-off valve 105 and the sixth on-off valve 106, the fluid after heat exchange exchanges heat from the fourth on-off valve 104 to the low-temperature heat storage area 33, and the low-temperature fluid after heat exchange returns to the inlet of the solar thermal collector 1 through the first water pump 81 to complete the solar-high-low temperature heat storage cycle;
2. when the solar energy is insufficient in rainy days or nights, the temperature is lower than 45 DEG C1When the temperature is lower than 55 ℃, the solar heat collector 1 independently supplies domestic hot water to a user end and simultaneously stores heat to the low-temperature heat storage area 33; at the moment, the fourth on-off valve 104, the fifth on-off valve 105, the seventh on-off valve 107, the twelfth on-off valve 112, the fifteenth on-off valve 115 and the first water pump 81 are opened; the on-off valve 102, the on-off valve three 103, the on-off valve six 106, the on-off valve eleven 111, the second water pump 82 and the third water pump 83 are closed;
the hot fluid working medium carries heat and outputs heat from an outlet of the solar heat collector 1 to the water heat exchanger 4 through the first temperature sensor 91, the first on-off valve 101 and the seventh on-off valve 107, and the cold fluid working medium after heat exchange is returned to an inlet of the solar heat collector 1 through the first water pump 81 to complete direct hot working medium circulation; tap water enters the water heat exchanger 4 through the on-off valve thirteen 113 to be heated, and hot water flowing out of the water heat exchanger 4 is sent to the user-side domestic hot water equipment 6 through the on-off valve twelve 112 to complete direct hot water supply; the fluid carries heat to exchange heat from the outlet of the solar heat collector 1 to the low-temperature heat storage area 33 through the first temperature sensor 91, the first on-off valve 101, the fifth on-off valve 105, the fifteenth on-off valve 115 and the fourth on-off valve 104, and the low-temperature fluid after heat exchange returns to the inlet of the solar heat collector 1 through the first water pump 81 to complete the solar-low-temperature heat storage cycle;
3. when the day is continuously cloudy, T1When the temperature is lower than 45 ℃, the first on-off valve 111 and the third water pump 83 are opened, and the fifth on-off valve 105, the seventh on-off valve 107, the twelfth on-off valve 112 and the first water pump 81 are closed;
(1) when T is4When the temperature is higher than 45 ℃, the low-temperature heat storage area 33 supplies heat to the user-side domestic hot water equipment 6, and at the moment, the second on-off valve 102, the third on-off valve 103, the fourth on-off valve 104, the sixth on-off valve 106, the fifteenth on-off valve 115 and the second water pump 82 are closed;
tap water enters the low-temperature heat storage area 33 through the on-off valve thirteen 113 and the third water pump 83 to be heated, and hot water from the low-temperature heat storage area 33 is sent to the user-side domestic hot water equipment 6 through the on-off valve eleven 111 to complete heat storage hot water supply;
(2) when T is4At < 45 ℃ whenThe biomass combustion furnace 2 operates, at the moment, the second on-off valve 102, the fourth on-off valve 104, the fifteenth on-off valve 115 and the second water pump 82 are opened, and the third on-off valve 103, the sixth on-off valve 106 and the fourth water pump 84 are closed;
the fluid carries heat from the outlet of the biomass combustion furnace 2 to the low-temperature heat storage area 33 through a second temperature sensor 92, a second on-off valve 102, a fifteenth on-off valve 115 and a fourth on-off valve 104, and the fluid returns to the biomass combustion furnace 2 through a second water pump 82 after heat exchange to complete a biomass-low-temperature heat storage cycle; tap water enters the low-temperature heat storage area 33 through the on-off valve thirteen 113 and the third water pump 83 to be heated, and hot water from the low-temperature heat storage area 33 is sent to the user-side domestic hot water equipment 6 through the on-off valve eleven 111 to complete heat storage hot water supply;
case three, when 18 ℃ is less than T5When the temperature is lower than 25 ℃, all devices of the energy supply system maintain the current running state.
Working condition two and non-heating season: the energy supply system supports hot water supply of users, and the energy utilization sequence is solar energy, heat storage output and biomass; at the moment, the first on-off valve 101 and the thirteenth on-off valve 113 are normally opened, the first temperature sensor 91, the second temperature sensor 92, the third temperature sensor 93 and the fourth temperature sensor 94 are normally opened, and the sixth on-off valve 106, the eighth on-off valve 108, the ninth on-off valve 109, the tenth on-off valve 110, the fourteenth on-off valve 114, the fourth water pump 84 and the fifth water pump 85 are normally closed; the biomass combustion furnace 2 is closed by default, if the biomass combustion furnace is opened, the biomass combustion furnace is operated at low power in the peak section (8:00-22:00) of peak-valley electricity, and the biomass combustion furnace is operated at high power in the valley section (22: 00-8: 00 of the next day);
situation one, when sunlight shines well, solar energy is sufficient, namely T1When the temperature is higher than 45 ℃, the solar heat collector 1 independently supplies domestic hot water to a user end and simultaneously stores heat to the low-temperature heat storage area 33; at the moment, the fourth on-off valve 104, the fifth on-off valve 105, the seventh on-off valve 107, the twelfth on-off valve 112, the fifteenth on-off valve 115 and the first water pump 81 are opened, and the 102, the third on-off valve 103, the eleventh on-off valve 111, the second water pump 82 and the third water pump 83 are closed;
the hot fluid working medium carries heat and outputs heat from an outlet of the solar heat collector 1 to the water heat exchanger 4 through the first temperature sensor 91, the first on-off valve 101 and the seventh on-off valve 107, and the cold fluid working medium after heat exchange is returned to an inlet of the solar heat collector 1 through the first water pump 81 to complete direct hot working medium circulation; tap water enters the water heat exchanger 4 through the on-off valve thirteen 113 to be heated, and hot water flowing out of the water heat exchanger 4 is sent to the user-side domestic hot water equipment 6 through the on-off valve twelve 112 to complete direct hot water supply; the fluid carries heat to exchange heat from the outlet of the solar heat collector 1 to the low-temperature heat storage area 33 through the first temperature sensor 91, the first on-off valve 101, the fifth on-off valve 105, the fifteenth on-off valve 115 and the fourth on-off valve 104, and the low-temperature fluid after heat exchange returns to the inlet of the solar heat collector 1 through the first water pump 81 to complete the solar-low-temperature heat storage cycle;
case two, when the solar energy is insufficient, T1When the temperature is lower than 45 ℃, the first on-off valve 111 and the third water pump 83 are opened, and the fifth on-off valve 105, the seventh on-off valve 107 and the twelfth on-off valve 112 are closed;
1. when T is4When the temperature is higher than 45 ℃, the low-temperature heat storage area 33 supplies heat to the user-side domestic hot water equipment 6, and at the moment, the second on-off valve 102, the third on-off valve 103, the fourth on-off valve 104, the fifteenth on-off valve 115, the second water pump 81 and the second water pump 82 are closed;
tap water enters the low-temperature heat storage area 33 through the on-off valve thirteen 113 and the third water pump 83 to be heated, and hot water from the low-temperature heat storage area 33 is sent to the user-side domestic hot water equipment 6 through the on-off valve eleven 111 to complete heat storage hot water supply;
2. when T is4When the temperature is lower than 45 ℃, the biomass combustion furnace 2 runs, the second on-off valve 102, the fourth on-off valve 104, the fifteenth on-off valve 115 and the second water pump 82 are opened, and the third on-off valve 103 and the second water pump 81 are closed;
the fluid carries heat from the outlet of the biomass combustion furnace 2 to the low-temperature heat storage area 33 through a second temperature sensor 92, a second on-off valve 102, a fifteenth on-off valve 115 and a fourth on-off valve 104, and the fluid returns to the biomass combustion furnace 2 through a second water pump 82 after heat exchange to complete a biomass-low-temperature heat storage cycle; tap water enters the low-temperature heat storage area 33 through the on-off valve thirteen 113 and the third water pump 83 to be heated, and hot water from the low-temperature heat storage area 33 is sent to the user-side domestic hot water equipment 6 through the on-off valve eleven 111 to complete heat storage hot water supply.
Example 1
The energy supply system disclosed by the invention utilizes multiple energy sources for coupling heat supply, and brings remarkable energy-saving benefit compared with the traditional single energy supply system.
Assuming that the heating season is 4 months (120 days × 24 hours/day 2880 hours), the user consumes 40 kilowatt-hour heat each day in the heating season, and assuming that the solar energy can supply 20 kilowatt-hours in a sunny day and the boiler is required to supply 20 kilowatt-hours. Assuming that the biomass fuel is 1000 yuan/ton (1 yuan/kg), the biomass fuel can provide heat for 5 kilowatt-hour/kg, and the thermal efficiency of the boiler is 85%. Assuming that half of the hot season is sunny, the solar heat collector can collect 20 × 60 kilowatt-hour heat.
When the user only uses the biomass boiler to supply heat, the biomass fuel cost is 40 multiplied by 120 divided (5 multiplied by 85%) × 1 ═ 1129.41 yuan in the heating season. When solar energy is used for coupling heat supply, the fuel cost of the heating season is 20 multiplied by 120 divided (5 multiplied by 85%) × 1 ═ 564.71 yuan. 564.71 yuan can be saved in one heating season, and if the service life of the equipment is 10 years, 5647 yuan can be saved in 10 years.
The above example conservatively estimates the heat collection amount of solar energy, and does not consider the large amount of heat saved by the daily optimized operation strategy and the heat required by domestic hot water, and if the factor is considered, the energy supply system based on the coupling of the solar energy and the biomass energy of the phase change energy storage can save more energy and operation cost.
Example 2
This energy supply system of solar energy and biomass energy coupling based on phase change energy storage utilizes the off-peak valley electricity to carry out the heat accumulation, compares traditional heating system, under the same heat output condition, and its running cost reduces, and is stable friendly to the electric wire netting.
Assuming a heating season of 4 months (120 days x 24 hours/day 2880 hours), the user consumes an average of 40 kilowatt-hour heat per day during the heating season, with the boiler supplying 20 kilowatt-hours. Suppose the biomass boiler requires 0.1 degrees of electricity per hour of operation.
Assume that the boiler operates at 8:00 to 22:00 (peak electricity in this time period, 0.568 yuan/kwh) and 22: when the energy consumption is balanced between 00 and 8:00 days (the time period is valley electricity and the electricity price is 0.288 yuan/kilowatt hour), the boiler needs electricity charges of 0.568 multiplied by 14 multiplied by 0.1+0.288 multiplied by 10 multiplied by 0.1 multiplied by 120 which is 129.98 yuan in the whole heating season.
Assuming that the boiler only utilizes 22: and when the time interval is from 00 to 8:00 (the time interval is valley electricity, and the electricity price is 0.288 yuan/kilowatt hour), the heat supply and the heat storage are carried out, and the boiler needs electricity charge of 0.288 multiplied by 0.1 multiplied by 2880 to 82.94 yuan in the whole heating season.
Assuming that the service life of the devices is 10 years, the electricity charge (129.98-82.94) × 10 ═ 470.4 yuan) in the heating season can be saved for 10 years.
The solar energy collection amount is conservatively estimated by the above example, the heat amount required by hot water in daily life is not considered, if the factor is considered, the energy supply system can save more operation cost, the measure actively matches with the peak regulation requirement of the power grid, and the solar energy collection system has important significance for responding to the increasingly serious peak regulation problem of citizens.
Example 3
Compared with the traditional energy supply system, the energy supply system provided by the invention has higher thermal comfort.
Thermal comfort is subjective satisfaction of people to the surrounding thermal environment, and is an important index of the quality of an air conditioning characterization system. It synthesizes multiple factors such as air temperature, air humidity, air flow, average radiant temperature, and wherein indoor air temperature is the main factor that influences thermal comfort, when indoor air temperature rate of change is too big, gives other people easily and causes the uncomfortable, and can influence average radiant temperature and vertical air temperature and change.
Because traditional single heat supply boiler, open the heating when indoor temperature is low and need consume the heat, and life hot water can not guarantee to use at any time. The indoor temperature difference is large under different time and outdoor temperature environment conditions, and the heat comfort is low. The energy supply system can utilize various energy sources to continuously adjust the temperature, and when the indoor temperature is low, three energy supply ways of the high-temperature heat storage area, the low-temperature heat storage area and the boiler are utilized to supply heat.
Nothing in this specification is said to apply to the prior art.
Claims (4)
1. A solar energy coupling biomass village and town building energy supply system based on phase change energy storage is characterized by comprising a solar heat collector, a biomass combustion furnace, a phase change heat storage device, a water heat exchanger, a heating heat exchanger, a water pump, a temperature sensor and an on-off valve;
the phase change heat storage device comprises a high-temperature heat storage area and a low-temperature heat storage area; a third temperature sensor is arranged in the high-temperature heat storage area and used for measuring the temperature of the high-temperature heat storage area; a fourth temperature sensor is arranged in the low-temperature phase change region and used for measuring the temperature of the low-temperature heat storage region; a fifth temperature sensor and user side heating equipment are arranged in the user room; the fifth temperature sensor is used for detecting the indoor temperature;
a first temperature sensor is arranged at an outlet of the solar heat collector and used for measuring the temperature of a working medium at the outlet of the solar heat collector; a first on-off valve is arranged on an outlet pipeline of the solar heat collector, the tail end of the pipeline is divided into two branches, a seventh on-off valve is arranged on one branch, and the tail end of the seventh on-off valve is connected with a working medium inlet of the water heat exchanger; the tail end of the branch is communicated with an outlet pipeline of the biomass combustion furnace, and a connecting point is positioned behind the on-off valve II according to the fluid flowing direction; a working medium outlet pipeline of the water heat exchanger is communicated with an inlet pipeline of the solar heat collector; a first water pump is arranged on an inlet pipeline of the solar heat collector;
a second temperature sensor is arranged at the outlet of the biomass combustion furnace and used for measuring the temperature of the working medium at the outlet of the biomass combustion furnace; an on-off valve II is arranged on an outlet pipeline of the biomass combustion furnace, the tail end of the pipeline is divided into two branches, an on-off valve eighth is arranged on one branch, the tail end of the on-off valve eighth is connected with a working medium inlet of the heating heat exchanger, and an on-off valve sixth is arranged on the other branch, and the tail end of the on-off valve sixth is connected with a first working medium inlet of the high-temperature heat storage area;
the working medium outlet pipeline of the heating heat exchanger is divided into two primary branches, one primary branch is provided with a fourth water pump, the tail end of the fourth water pump is connected with a second working medium inlet of the high-temperature heat storage area, the other primary branch is provided with an on-off valve nine, the tail end of the second branch is divided into two secondary branches, one secondary branch is provided with an on-off valve four, the tail end of the second branch is connected with a working medium inlet of the low-temperature heat storage area, the other secondary branch is provided with an on-off valve three, the tail end of the second branch is divided into two tertiary branches, the tail end of one tertiary branch is communicated with the inlet pipeline of; a second water pump is arranged on an inlet pipeline of the biomass combustion furnace;
the tail end of a first working medium outlet pipeline of the high-temperature heat storage area is connected with a primary branch with an on-off valve nine, and a connecting point is positioned behind the on-off valve nine according to the fluid flowing direction; the first working medium outlet of the high-temperature heat storage area is communicated with the first working medium inlet of the high-temperature heat storage area through a pipeline provided with a cut-off valve fifteen; the tail end of a working medium outlet pipeline of the low-temperature heat storage area is communicated with a secondary branch with a third on-off valve, and a connecting point is positioned behind the third on-off valve according to the fluid flowing direction; a second working medium outlet of the high-temperature heat storage area is connected with a working medium inlet of the heating heat exchanger through a pipeline, and a switch valve is arranged on the pipeline;
the tail end of a pipeline externally connected with a tap water source is divided into two paths, one path is provided with a third water pump, the tail end of the third water pump is connected with a water inlet of the low-temperature phase change region, and the other path is connected with a water inlet of the water-using heat exchanger; the water outlet of the low-temperature phase change region is connected with user-side domestic hot water equipment through a pipeline, and an on-off valve eleven is arranged on the pipeline; the water outlet of the water heat exchanger is connected with user-side domestic hot water equipment through a pipeline, and a switch valve twelve is arranged on the pipeline;
an outlet of the user side heating equipment is connected with a heating fluid inlet of the heating heat exchanger through a pipeline, and a fifth water pump is arranged on the pipeline; the inlet of the user side heating equipment is connected with the heating fluid outlet of the heating heat exchanger through a pipeline, and the pipeline is provided with a fourteen on-off valve.
2. The phase change energy storage based solar energy coupled biomass village and town building energy supply system according to claim 1, wherein the user side domestic hot water equipment is disposed in a user room.
3. The phase change energy storage based solar coupled biomass village and town building energy supply system of claim 1, wherein said phase change heat storage device further comprises a thermal insulation layer; the high-temperature heat storage area and the low-temperature heat storage area are integrated into a whole structure, the middle part of the whole structure is separated by a thermal insulation layer to avoid heat exchange between the high-temperature heat storage area and the low-temperature heat storage area, and the outer side of the whole structure is subjected to heat preservation and packaging by a thermal insulation layer; the heat insulation layer is made of heat insulation materials.
4. The phase-change energy storage based solar energy coupling biomass village and town building energy supply system according to claim 3, wherein a corrosion-resistant shell is arranged on the inner side of a heat insulation layer of the phase-change heat storage device, and a waterproof layer is arranged on the outer side of the heat insulation layer; the corrosion-resistant shell is formed by welding high-temperature-resistant stainless steel, and the waterproof layer is made of waterproof materials.
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