CN217209522U - Multi-heat source complementary heating system - Google Patents
Multi-heat source complementary heating system Download PDFInfo
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- CN217209522U CN217209522U CN202122300950.4U CN202122300950U CN217209522U CN 217209522 U CN217209522 U CN 217209522U CN 202122300950 U CN202122300950 U CN 202122300950U CN 217209522 U CN217209522 U CN 217209522U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- 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]
- Y02B30/12—Hot water central heating systems using heat pumps
Abstract
The patent discloses a multi-heat source complementary heating system, which comprises a low-loop-temperature air source collecting device (1) serving as a water source heat pump (8), a boiler (2) and a water source heat pump (8) for providing a low-temperature heat source; the evaporator side water return end of the water source heat pump (8) is connected with the condenser side water inlet end of each air source heat pump (11); the water outlet end of the boiler (2) and the water outlet end of the condenser side of the water source heat pump (8) are respectively connected with a water separator (4) of the heat supply system, and the water inlet end of the boiler (2) and the water inlet end of the condenser side of the water source heat pump (8) are respectively connected with a water collector (6) of the heat supply system; the advantages are that: 1) the heat is supplied in a multi-heat source complementary mode, the advantages of each single heat source can be fully exerted, and multi-energy complementary and step utilization of clean energy and renewable energy are formed; 2) the heat pump has high energy efficiency ratio and low heat supply cost.
Description
Technical Field
The patent relates to the field of clean energy and renewable energy heat supply, in particular to a multi-heat-source complementary heat supply system.
Background
At present, a distributed energy heating system adopts a single heat source, such as a gas-fired hot water boiler, an electric boiler (including a heat storage electric boiler), a water/ground source heat pump, an air source heat pump and the like. The distributed heat supply system establishes a boiler room or a heat energy station by using the single heat source and forms a circulating hot water heat supply system with a user heat dissipation terminal through a water supply/return pipe network.
The gas-fired hot water boiler takes gas (such as natural gas, liquefied petroleum gas, city gas, methane and the like) as fuel, and heats water through a burner to realize heating, and has the advantages of high intelligent degree, quick heating, low noise and no dust. However, the single gas-fired hot water boiler is adopted as a heat supply source, and the defects are as follows: 1) the poor gas causes poor heat supply guarantee in winter; along with the excessive dependence on natural gas caused by town heat supply of 'coal changes into gas', gas shortage occurs in winter, and a distributed heat supply heat source is broken down due to the supply interruption of fuel gas; 2) the energy consumption unit price is high; the natural gas is fossil fuel and belongs to non-renewable resources, a gas source is influenced by the international energy market, the gas price is bound to be in an upward trend, and the gas price in the northern area is already in a normal state in winter; 3) discharging nitrogen; due to the temperature island effect formed by the emission of the flue gas of the gas-fired boiler, the emission contains nitrogen oxides, and the atmosphere is polluted; 4) the carbon emission index is high; the medium and small gas-fired boilers have low heat efficiency, high gas consumption and higher carbon emission index.
The electric water heating boiler is a boiler which heats an electric heating group through electric power to generate hot water. The electric boiler is divided into a water tank for heat storage and a high-temperature phase-change heat storage material for heat storage according to a heat storage medium, and is high in intelligent degree, fast in heating, low in noise and free of dust. The disadvantages of using a single electric boiler (including a regenerative electric boiler) as a heat source for heat supply are: 1) the electricity price is high; in areas without heat supply and preferential electricity price, the power consumption cost per unit area is about twice that of a gas boiler, and users are hard to bear; 2) the power distribution capacity is large; the power distribution capacity is at least 1.65 times of the rated power of the boiler; 3) the heat storage electric boiler does not save energy; the heat storage electric heating boiler which is generally popularized works by utilizing the time-of-use electricity price, the energy consumption is not reduced, and only the energy consumption cost is reduced, because the heat efficiency of intermediate heat exchange (water/water or wind/water heat exchange) is lower than that of the common electric heating boiler, the heat storage electric heating boiler belongs to non-energy-saving equipment.
The common types of heat pumps in the distributed heating system are as follows: water/ground source heat pumps and air source heat pumps. The heat pump can transfer low-grade heat energy in the nature to high-grade heat energy for heating. The heat pump consumes a part of energy (electric energy) and transfers the energy (low-grade heat energy stored in water, soil and air) stored in the environment medium to high grade through the heat transfer working medium circulating system to heat the water, and the high-grade energy (electric energy) consumed by the heat pump is only a part of the output energy, so that a large amount of high-grade energy can be saved by adopting the heat pump technology. But the disadvantages of using a single heat pump as a heat supply source are that: the water/ground source heat pump takes rock-soil mass, stratum soil, underground water or surface water as a low-temperature heat source, wherein the water source heat pump needs a pumping well and a recharging well, and the recharging is difficult to continue, so that geological hazards are easily caused; well drilling is subject to local ground water management and is currently difficult to approve. The geothermal energy exchange system of the ground source heat pump has large occupied area and higher investment.
Disclosure of Invention
The patent aims to provide a multi-heat-source complementary heating system, which realizes the complementary advantages of the single heat sources to solve the respective defects of the single heat sources.
The technical scheme of this patent is: a multi-heat source complementary heating system is characterized in that: the system comprises a water source heat pump serving as a basic heat source, a boiler serving as a peak regulation heat source and a low-loop-temperature air source collecting device for providing a low-temperature heat source for the water source heat pump; the low-ring-temperature air source collecting device is formed by connecting a plurality of air source heat pumps in parallel, wherein the water outlet end of the condenser side of each air source heat pump is connected with the water inlet end of the evaporator side of the water source heat pump, and the water return end of the evaporator side of the water source heat pump is connected with the water inlet end of the condenser side of each air source heat pump; the water outlet end of the boiler and the water outlet end of the condenser side of the water source heat pump are respectively connected with a water separator of the heat supply system, and the water inlet end of the boiler and the water inlet end of the condenser side of the water source heat pump are respectively connected with a water collector of the heat supply system;
a condensation backwater pump set is arranged between the water collector and the side water inlet end of the water source heat pump condenser to control the heat supply backwater in the water collector to enter the side of the water source heat pump condenser; a boiler circulating pump is arranged between the water collector and the circulating water inlet end of the boiler to control the heat supply backwater in the water collector to enter the boiler;
the boiler is a gas boiler, an electric boiler, a heat storage electric boiler, a straw furnace or an absorption heat pump;
the water source heat pump is a compression type electric drive heat pump;
the water outlet end of the water distributor is connected with the water inlet end of the indoor heat dissipation equipment of the user side, and the water return end of the indoor heat dissipation equipment of the user side is connected with the water inlet end of the water collector;
the indoor heat dissipation equipment of the user side is a radiator, a buried pipe or a fan coil.
The advantage of this patent is:
1. the heat is supplied in a multi-heat source complementary mode, the advantages of each single heat source can be fully exerted, and multi-energy complementary and step utilization of clean energy and renewable energy are formed; in the heating season, excessive fluctuation of heating cost caused by gas price increase due to 'gas shortage' can be avoided, supply stop due to 'gas shortage' can be avoided, and heating is reliable;
2. on the basis of mature technology of each single heat source, the reliability of the multi-heat-source complementary unit is high;
3. the evaporator end and the condenser end of the air source heat pump and the water source heat pump can work under a refrigeration working condition after being switched, and the multi-heat source complementary system can realize cold and hot triple supply (heat supply, domestic water and refrigeration) for public buildings.
Drawings
FIG. 1: a schematic diagram of a multi-heat source complementary heating system;
FIG. 2: a schematic structural diagram of a multi-heat source complementary heating system of a certain community;
in the figure: 1-low-ring-temperature air source collecting device; 11-air source heat pump; 2-a boiler; 3-boiler circulating pump group; 31-low zone circulating pump group; 32-high zone circulating pump group; 4-a water separator; 41-low region water separator; 42-high water separator; 5-indoor heat dissipation equipment; 51-buried pipe, 52-fan coil; 53-radiator; 54-low compartment internal heat dissipation devices; 55-high compartment internal heat dissipation device; 6, a water collector; 61-a low zone water collector; 62-high area water collector; 7-a condensate return pump set; 8-water source heat pump; 9-heat capacity circulating pump group; 10-a thermal mass unit; 100-exchanging the lower area plate; 200-high area plate exchange.
Detailed Description
The following detailed description of the patent refers to the accompanying drawings and detailed description.
As shown in fig. 1, the multi-heat-source complementary heating system described in this patent includes a basic heat source, a peak-shaving heat source, a low-loop-temperature air source collecting device 1, a heat capacity unit 10, a water separator 4, a water collector 6, an indoor heat dissipation device 5, and the like, where the basic heat source is a water source heat pump 8, and the low-loop-temperature air source collecting device 1 is formed by connecting a plurality of air source heat pumps 11 in parallel; the low-temperature hot water at the condenser side of each air source heat pump 11 of the low-ring-temperature air source collecting device 1 is collected to enter the evaporator side of the water source heat pump 8, and the water source heat pump 8 takes the low-temperature hot water provided by the low-ring-temperature air source collecting device 1 as a low-temperature heat source.
The water source heat pump 8 is a compression type electric drive heat pump, drives a compressor to do work through a small amount of electric energy, absorbs heat in low-temperature hot water at an evaporator side of the compressor, and releases heat to circulating water at a condenser side through working medium circulation; the principle is as follows: through the internal circulation of the water source heat pump 8, the water source heat pump 8 absorbs heat from the circulating water measured by the evaporator thereof, and heats the circulating water at the condenser side to provide hot water for heating users; further, as an application extension of the present patent, a condenser side water outlet end of the air source heat pump 11 is connected with an evaporator side water inlet end of the water source heat pump 8 through the heat capacity unit 10, and an evaporator side water return end of the water source heat pump 8 is connected with a condenser water inlet end of the air source heat pump 11; the water outlet end of the condenser side of the air source heat pump 11 is connected with a heat capacity unit 10, low-temperature hot water on the condenser side of each air source heat pump 11 is collected and then firstly enters the heat capacity unit 10 for storage, the heat capacity unit 10 stores, regulates and distributes the low-temperature hot water collected from the condenser side of the air source heat pump 11, the low-temperature hot water with the temperature of 20-25 ℃ is provided to the evaporator side of the water source heat pump 8 through a heat capacity circulation pump set 9 to serve as a low-temperature heat source, and after the evaporator of the water source heat pump 8 absorbs heat, the hot water with the temperature of 15-20 ℃ is returned to the condenser side of the air source heat pump 11.
A heat capacity circulation pump set 9 is arranged between the heat capacity unit 10 and the water inlet end of the evaporator side of the water source heat pump 8 and is used for controlling the flow of low-temperature hot water entering the evaporator side of the water source heat pump 8 from the heat capacity unit 10 and providing power required by circulation.
The boiler 2 is used as a peak regulation heat source; the hot water outlet end of the boiler 2 and the water outlet end of the condenser side of the water source heat pump 8 are respectively connected with a water separator 4 of the heat supply circulating system, and the circulating water inlet end of the boiler 2 and the condenser water inlet end of the water source heat pump 8 are respectively connected with a water collector 6 of the heat supply circulating system; the boiler 2 is any one or a plurality of gas-fired boilers, electric heating boilers, heat storage electric boilers, straw stoves or absorption heat pumps which are connected in parallel.
The heat supply circulating backwater led out from the water collector 6 respectively enters the boiler 2 and the condenser side of the water source heat pump 8 for heating, and the heated hot water sequentially passes through the water separator 4, the user side indoor heat dissipation equipment 5 and the water collector 6 to form heat supply circulation. The indoor heat dissipation device 5 of the user end can be a radiator 53 or a buried pipe 51 or a fan coil 52; a condensation water return pump set 7 is arranged between the water collector 6 and the condenser side water inlet end of the water source heat pump 8 and is used for regulating and controlling the water quantity entering the condenser side water inlet end of the water source heat pump 8 and providing power required by circulation; and a boiler circulating pump group 3 is arranged between the water collector 6 and the circulating water inlet end of the boiler 2 and used for regulating and controlling the amount of the heating circulating water entering the boiler 2 and providing power required by circulation.
The operation of the heat pump and the boiler is controlled by the control system, so that the basic heat source provides not less than 60% of heat for the heat supply system, and the rest of heat is supplemented by the peak regulation heat source; the peak-regulating heat source works at full load when the heat supply system is started, and the rest time is supplemented with heat according to the part with insufficient heat supply of the basic heat source, so that about 40 percent of heat demand of the heat supply system is born.
The peak-regulating heat source and the basic heat source are prepared according to the following principle:
1) nominal heating capacity: the proportion of the peak-shaving heat source is 60 percent, the proportion of the basic heat source is 40 percent, and if the initial investment is sought to be reduced, the proportion of the peak-shaving heat source can be increased; when the peak regulation heat source is an electric boiler, the basic heat source ratio can be increased for reducing the power distribution capacity.
2) Actual heat supply: the basic heat source runs at full load, the advantage of high energy efficiency ratio is fully exerted, and the heat supply accounts for more than 60%; the peak regulation heat source performs heat supplement on the part with insufficient heat supply of the basic heat source in other time except for full load work during system starting, (peak regulation load change is limited in the optimal efficiency range of a boiler), and accounts for about 40% of the heat supply.
3) Through system control, the peak-shaving heat source automatically adjusts according to heat load change and the heat supply amount of the basic heat source, and the heat supply system is kept to work in an energy-saving state all the time.
As shown in FIG. 2, it is a schematic view of a multi-heat source complementary heating system of a certain district in northern China, the district is a high-rise building with a total height of 33 stories, a high-rise district with 16 stories is set above 16 stories, a low-rise district with a heat supply area of 100000m 2 According to the local winter environmental temperature and the heat load index of the energy-saving building of the building, the index is 40w/m 2 Then the calculated thermal load is: 4000 KW. Adopting a multi-element complementary heat supply unit, wherein a heat source is a peak regulation heat source which is 1 2.4MW gas-fired hot water boiler; 1 name meaning heating quantity 1600KW water source heat pump 8 is basic heat source (provides the low temperature heat source with many air source heat pump 11), total heating capacity: 4000 KW.
The low-ring-temperature air source collecting device 1 transfers low-grade heat energy in air to generate low-temperature hot water, the low-temperature hot water is collected to the heat capacity unit 10 for storage, and enters the condenser side of the water source heat pump 8 through the heat capacity unit 10 to serve as a low-temperature heat source of the water source heat pump 8, and a small amount of electric energy is input to the water source heat pump 8 to obtain high-grade heat energy. The comprehensive energy efficiency ratio (COP) of the water source heat pump 8 can reach 2.5-3.5. The basic heat source runs at full load, and the part with insufficient heat supply capacity is supplemented by the peak regulating boiler.
For the low-area heating of the high-rise building at the user end, a low-area water separator 41, a low-area plate exchanger 100 and a low-area water collector 61 are arranged, and the low-area hot water circulation is divided into a low-area primary-side hot water circulation and a low-area secondary-side hot water circulation by taking the primary side and the secondary side of the low-area plate exchanger 100 as boundaries; the path of the low-zone primary side hot water circulation is as follows: after high-temperature hot water of a basic heat source and a peak-shaving heat source is collected in the water separator 4, primary side hot water is input to the low-area plate exchanger 100, and after heat exchange with low-area secondary side return water, the primary side hot water returns to the water collector 6, then respectively flows back to the basic heat source and the peak-shaving heat source through the water collector 6, and enters the water separator 4 again after being heated by the condenser of the water source heat pump 8 and the boiler 2, so that low-area primary side hot water circulation is formed;
the low-zone secondary side hot water circulation path is as follows: after the secondary side heat exchange and temperature rise of the indoor heating circulating hot water of the user in the low region plate exchanger 100, the indoor heating circulating hot water sequentially enters the low region water collector 41 and the low region indoor heat dissipation device 54, and after heat dissipation of the low region indoor heat dissipation device 54, return water is sequentially heated by the low region water collector 61 and the low region plate exchanger 100, so that low region secondary side hot water circulation is formed. A low-region circulating pump group 31 is arranged between the low-region water collector 61 and the low-region plate exchanger 100 and is used for controlling low-region secondary hot water circulation and providing circulating power for the low-region secondary hot water circulation;
for high-rise building high-rise heating of a user side, a high-rise water separator 42, a high-rise plate exchanger 200 and a high-rise water collector 62 are arranged, the primary side and the secondary side of the high-rise plate exchanger 200 are used as boundaries, and high-rise hot water circulation is also divided into high-rise primary side hot water circulation and high-rise secondary side hot water circulation; the path of the high-zone primary side hot water circulation is as follows: after high-temperature hot water of a basic heat source and a peak-shaving heat source is collected in the water separator 4, primary side hot water is input to the high-area plate exchanger 200, exchanges heat with high-area secondary side return water, returns to the water collector 6, respectively returns to the basic heat source and the peak-shaving heat source through the water collector 6, is heated by the condenser of the water source heat pump 8 and the boiler 2, and then enters the water separator 4 again, so that high-area primary side hot water circulation is formed;
the high-area secondary side hot water circulation path is as follows: after the secondary side heat exchange and temperature rise of the high area plate exchanger 200, the indoor heating circulating hot water of the user sequentially enters the high area water collector 42 and the high area indoor heat dissipation device 55, and after heat dissipation of the high area indoor heat dissipation device 55, return water is sequentially heated by the high area water collector 62 and the high area plate exchanger 200, so that secondary side hot water circulation of the high area is formed. A high-zone circulating pump group 32 is arranged between the high-zone water collector 62 and the high-zone plate exchanger 200 and is used for controlling the secondary hot water circulation of the high-zone and providing circulating power for the secondary hot water circulation of the high-zone;
a condensation backwater pump set 7 is arranged on a connecting pipeline between the water collector 6 and the side water inlet end of the condenser of the water source heat pump 8, and a boiler circulating pump set 3 is arranged on a connecting pipeline between the water collector 6 and the circulating water inlet of the boiler 2 and is used for controlling the primary side hot water circulation of the high/low area and providing circulating power for the primary side hot water circulation of the high/low area.
Claims (6)
1. A multi-heat source complementary heating system is characterized in that: comprises a water source heat pump (8) used as a basic heat source, a boiler (2) used as a peak regulation heat source and a low-ring-temperature air source collecting device (1) used for providing a low-temperature heat source for the water source heat pump (8); the low-loop-temperature air source acquisition device (1) is formed by connecting a plurality of air source heat pumps (11) in parallel, the water outlet end of the condenser side of each air source heat pump (11) is connected with the water inlet end of the evaporator side of the water source heat pump (8), and the water return end of the evaporator side of the water source heat pump (8) is connected with the water inlet end of the condenser side of each air source heat pump (11); the water outlet end of the boiler (2) and the water outlet end of the condenser side of the water source heat pump (8) are respectively connected with a water separator (4) of the heat supply system, and the water inlet end of the boiler (2) and the water inlet end of the condenser side of the water source heat pump (8) are respectively connected with a water collector (6) of the heat supply system.
2. A multi-heat-source complementary heating system according to claim 1, wherein: a condensation backwater pump set (7) is arranged between the water collector (6) and the side water inlet end of the condenser of the water source heat pump (8), and the heat supply backwater in the water collector (6) is controlled to enter the side of the condenser of the water source heat pump (8); a boiler circulating pump (3) is arranged between the water collector (6) and the circulating water inlet end of the boiler (2), and heat supply backwater in the water collector (6) is controlled to enter the boiler (2).
3. A multi-heat-source complementary heating system according to claim 1, wherein: the boiler (2) is a gas boiler, an electric boiler, a heat storage electric boiler, a straw furnace or an absorption heat pump.
4. A multi-heat-source complementary heating system according to claim 1, wherein: the water source heat pump (8) is a compression type electric drive heat pump.
5. A multi-heat-source complementary heating system according to claim 1, wherein: the water outlet end of the water distributor (4) is connected with the water inlet end of the user side indoor heat dissipation equipment (5), and the water return end of the user side indoor heat dissipation equipment (5) is connected with the water inlet end of the water collector (6).
6. A multi-heat-source complementary heating system according to claim 5, wherein: the indoor heat dissipation equipment (5) of the user end is a radiator (53) or a buried pipe (51) or a fan coil (52).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202122300950.4U CN217209522U (en) | 2021-09-22 | 2021-09-22 | Multi-heat source complementary heating system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122300950.4U CN217209522U (en) | 2021-09-22 | 2021-09-22 | Multi-heat source complementary heating system |
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| CN217209522U true CN217209522U (en) | 2022-08-16 |
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| CN202122300950.4U Active CN217209522U (en) | 2021-09-22 | 2021-09-22 | Multi-heat source complementary heating system |
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