CN111380101A - Air source heating system suitable for high-humidity area and operation method thereof - Google Patents
Air source heating system suitable for high-humidity area and operation method thereof Download PDFInfo
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- CN111380101A CN111380101A CN202010291259.1A CN202010291259A CN111380101A CN 111380101 A CN111380101 A CN 111380101A CN 202010291259 A CN202010291259 A CN 202010291259A CN 111380101 A CN111380101 A CN 111380101A
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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
- F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
- F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
- F24D11/0228—Central heating systems using heat accumulated in storage masses using heat pumps water heating system combined with conventional heater
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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
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1039—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump
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- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses an air source heating system suitable for a high-humidity area and an operation method thereof, belonging to the technical field of air source heating in the high-humidity area, wherein a modularized power unit comprises an auxiliary heating and balancing heat loss unit and a transmission and distribution unit, wherein a closed pressure-bearing water tank is arranged in the auxiliary heating and balancing heat loss unit, the modularized power unit has the functions of increasing the water capacity of a system and reducing the fluctuation of water supply temperature during air source defrosting; the system is matched with a whole set of operation strategy, so that the power consumption of the air source heat pump in the high-humidity area during defrosting can be reduced, and the operation cost is saved.
Description
Technical Field
The invention relates to the technical field of air source heat supply in high-humidity areas, in particular to an air source heat supply system suitable for high-humidity areas and an operation method thereof.
Background
The air source heat pump has the advantages of cooling and heating, small occupied space, energy conservation, environmental protection, convenience and the like, and is more and more favored.
However, the frosting problem is a main factor influencing the normal heating of the heat pump unit in winter, particularly in cold northern areas and south areas with high humidity and cold, the heat pump unit can not run normally in winter, and the development of the air source heat pump is severely restricted. Therefore, the improvement of the defrosting technology is a necessary condition for promoting the development of the air source heat pump and is a foundation stone for developing the market of the air source heat pump. A great deal of research has been done at home and abroad on defrosting of an air source heat pump, and two common defrosting methods are reverse cycle defrosting and hot gas bypass defrosting.
Although the defrosting effect of the four-way valve reverse defrosting is good, when the technology is used for defrosting, the compressor of the air source heat pump stops supplying heat, and the air source heat pump starts to operate by reversely refrigerating, so that the heat supply amount of the system is obviously influenced. Through relevant tests, the heat loss caused by defrosting by adopting the technology accounts for about 10.2 percent of the total energy loss of the air source heat pump. Meanwhile, the defrosting technology is easy to cause liquid impact and is very unfavorable for the normal use of the compressor.
Meanwhile, the defrosting technology is easy to cause liquid impact and is very unfavorable for the normal use of the compressor. The hot gas bypass defrosting mode does not need to absorb indoor heat, can provide a small amount of heat at the same time, avoids the phenomenon of cold air blowing during defrosting, reduces the water supply temperature slowly, but reduces the indoor temperature by 10 ℃ due to overlong defrosting time, and therefore the air source heating system suitable for the high-humidity area and the operation method thereof are provided.
Disclosure of Invention
The invention aims to provide an air source heating system suitable for a high-humidity area and an operation method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an air source heating system suitable for high humid area, includes air-cooled hot and cold water unit and modularization power unit, modularization power unit includes auxiliary heating and balanced heat loss unit, transmission and distribution unit and automatic control unit, dispose closed pressure-bearing water tank in auxiliary heating and balanced heat loss unit, the effect in the system is increasing system water capacity, reduces the fluctuation of water supply temperature when the air source defrosts, closed pressure-bearing water tank and electric heater electric connection.
The transmission and distribution unit comprises a cold and hot water conveying system, an automatic dosing device and a reserved water softening device, wherein the cold and hot water conveying system conveys cold and hot water generated by an air-cooled cold and hot water unit to a tail end circulating pump of a tail end user, the automatic dosing device is connected with a water supplementing system through a pipeline, the automatic dosing device is started when water is added for the first time or water is supplemented to start at the initial operation stage of an air-conditioning heating season, and a tap water pipe is externally connected to the pipeline of the automatic dosing.
The modularized power unit is respectively connected with the air source heat pump unit and the end user through the transmission and distribution unit to realize water path circulation, and the modularized power unit realizes intelligent operation and stable heat supply temperature through the auxiliary heating and heat loss balancing unit and the automatic control unit.
An operation method of an air source heating system suitable for a high-humidity area comprises the following specific steps,
(1) during heating in winter, by means of automatic control, switching of valves, distribution of flow, real-time tracking of outdoor climate condition changes and analysis and processing of data collected by various sensors of the system, when external environmental conditions are favorable, a part of air-cooled cold and hot water units raise the temperature of a heat transfer medium (generally water) based on the working principle of a heat pump, directly supply output high-temperature heating hot water to a user load, and simultaneously transmit high-temperature water generated by a redundant host to a closed pressure-bearing water tank to realize heat storage;
(2) when the external environment is low temperature and high humidity, the heat stored in the closed pressure-bearing water tank can be supplemented to the tail end or high-temperature secondary temperature lifting equipment, the number and time of running air source units are reduced, and the running power consumption of the system is saved.
The high and low humidity standards described herein are defined as high humidity values of > 70% at temperatures around 0 c, which is an industry accepted practice, and the absolute moisture content of air at this operating point.
Compared with the prior art, the invention has the beneficial effects that: aiming at the condition that the existing air source heat pump is poor in heating in a high-humidity area, the heating system is optimized, and the influence of fluctuation of water supply temperature during air source defrosting is effectively reduced by adding the buffer water tank; the system is simple and reliable, and the increased investment is less;
(2) the system is matched with a whole set of operation strategy, so that the power consumption of the air source heat pump in the high-humidity area during defrosting can be reduced, and the operation cost is saved.
Drawings
FIG. 1 is a schematic diagram of a heating system according to the present invention;
FIG. 2 is a schematic diagram of the operation of the present invention.
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides an air source heating system suitable for high humidity areas, which includes an air-cooled cold and hot water unit and a modular power unit, wherein the modular power unit includes an auxiliary heating and heat loss balancing unit, a transmission and distribution unit and an automatic control unit, a closed pressure-bearing water tank is configured in the auxiliary heating and heat loss balancing unit, the closed pressure-bearing water tank is used for increasing the water capacity of the system and reducing the fluctuation of the water supply temperature when the air source is defrosted, and the closed pressure-bearing water tank is electrically connected with an electric heater.
The system consists of a heat (cold) source, a transmission and distribution system, a tail end system and a transmission and distribution pipeline, and can simultaneously meet the requirements of cooling and heating by taking a building as a unit for residential (or suitable office) buildings. The cold and heat source is an air source heat pump unit and is arranged on the roof of a building or the skirt house roof of a building area; the transmission and distribution system adopts a modularized power integration unit and is arranged at the same position with a cold and heat source; the tail end can be in the form of a fan coil, a cooling and heating dual-purpose radiator, floor radiation heating and the like; the transmission and distribution pipeline is divided into a main water supply and return vertical pipe (arranged in a public stairwell), each household distribution pipeline and an indoor water supply and return pipe.
The transmission and distribution unit comprises a cold water and hot water conveying unit, an automatic dosing device and a reserved water softening device are connected with a water supplementing system through pipelines, the cold water and hot water conveying unit conveys cold water and hot water generated by an air-cooled cold water and hot water unit to a tail end circulating pump of a tail end user, the automatic dosing device and the reserved water softening device are started when water is added for the first time or water is supplemented to the air-conditioner heating season in the initial running stage, and meanwhile, a tap.
The modularized power unit is respectively connected with the air source heat pump unit and the end user through the transmission and distribution unit, water path circulation is achieved, and meanwhile intelligent operation and stable heat supply temperature are achieved through the auxiliary heating and heat loss balancing unit and the automatic control unit.
When the air-cooled cold and hot water unit is frosted seriously, the heating capacity of the running unit is reduced by 11%, in addition, under the frosted outdoor temperature, the heating capacity of the unit per se is 84% of the nominal working condition, and the heat supply capacity of the unit at the moment is 0.75% of the nominal working condition.
Under the climatic condition, a refrigerating capacity calculation model is generated when the unit defrosts in a refrigerating state, when the unit operates in a refrigerating mode, the corresponding condensing temperature is 0 ℃ (the outdoor environment temperature), the average value of the exhaust pressure during defrosting is 10.5bar (the condensing temperature is 13 ℃) by referring to the analysis in relevant documents during reverse cycle defrosting, the evaporating temperature is 7 ℃, and the refrigerating capacity of the unit is about 1.4 times of the nominal working condition.
And (4) combining the two calculation models, wherein under the climate condition, the influence of the defrosting process on the heat supply capacity of the unit is about 9%. The heat storage tank with a certain volume is additionally arranged, so that the water capacity of the system is increased, and the influence of the attenuated heating capacity of the unit per hour on the water supply temperature is reduced.
Regional winter weather, represented by xu, is divided into three significant categories: 1. the humidity is high at night in the morning and at night, the frosting is easy, and the humidity is low before and after noon, and the frosting is not easy to occur; 2. the humidity is large all day (rain, snow and fog); 3. the humidity is not large all day at the initial stage or the final stage of heating, and the unit basically runs without frost. Under the climate condition with high humidity, even if the main machine adopts an operation strategy of defrosting in turn, the operation proportion of the defrosting unit is still about 23 percent higher in each hour, and large fluctuation is generated on the water supply temperature.
An operation method of an air source heating system suitable for a high-humidity area comprises the following specific steps,
(1) during heating in winter, by means of automatic control, switching of valves, distribution of flow, real-time tracking of outdoor climate condition changes and analysis and processing of data collected by various sensors of the system, when external environmental conditions are favorable, a part of air-cooled cold and hot water units raise the temperature of a heat transfer medium (generally water) based on the working principle of a heat pump, directly supply output high-temperature heating hot water to a user load, and simultaneously transmit high-temperature water generated by a redundant host to a closed pressure-bearing water tank to realize heat storage;
(2) when the external environment is low temperature and high humidity, the heat stored in the closed pressure-bearing water tank can be supplemented to the tail end or high-temperature secondary temperature lifting equipment, the number and time of running air source units are reduced, and the running power consumption of the system is saved.
The high and low humidity standards described herein are defined as high humidity values of > 70% at temperatures around 0 c, which is an industry accepted practice, and the absolute moisture content of air at this operating point.
The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts conventional means such as bolts, rivets, welding and the like mature in the prior art, the machines, the parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, so that the detailed description is omitted.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a be applicable to high wet area air source heating system which characterized in that: including air-cooled hot and cold water unit and modularization power unit, modularization power unit includes auxiliary heating and balanced heat loss unit, transmission and distribution unit and automatic control unit, dispose closed bearing water tank in auxiliary heating and balanced heat loss unit, the effect in the system is for increasing system water capacity, and the fluctuation of water supply temperature when reducing air source defrosting, closed bearing water tank and electric heater electric connection.
2. The air source heating system suitable for the high-humidity area according to claim 1, wherein: the transmission and distribution unit comprises a cold and hot water conveying system, an automatic dosing device and a reserved water softening device, wherein the cold and hot water conveying system conveys cold and hot water generated by an air-cooled cold and hot water unit to a tail end circulating pump of a tail end user, the automatic dosing device is connected with a water supplementing system through a pipeline, the automatic dosing device is started when water is added for the first time or water is supplemented to start at the initial operation stage of an air-conditioning heating season, and a tap water pipe is externally connected to the pipeline of the automatic dosing.
3. The air source heating system suitable for the high-humidity area and the operation method thereof according to claim 1 are characterized in that: the modularized power unit is respectively connected with the air source heat pump unit and the end user through the transmission and distribution unit to realize water path circulation, and the modularized power unit realizes intelligent operation and stable heat supply temperature through the auxiliary heating and heat loss balancing unit and the automatic control unit.
4. The operation method of the air source heating system suitable for the high-humidity area according to claim 1, wherein: the specific method is as follows,
(1) during heating in winter, by means of automatic control, switching of valves, distribution of flow, real-time tracking of outdoor climate condition changes and analysis and processing of data collected by various sensors of the system, when external environmental conditions are favorable, a part of air-cooled cold and hot water units raise the temperature of a heat transfer medium (generally water) based on the working principle of a heat pump, directly supply output high-temperature heating hot water to a user load, and simultaneously transmit high-temperature water generated by a redundant host to a closed pressure-bearing water tank to realize heat storage;
(2) when the external environment is low temperature and high humidity, the heat stored in the closed pressure-bearing water tank can be supplemented to the tail end or high-temperature secondary temperature lifting equipment, the number and time of running air source units are reduced, and the running power consumption of the system is saved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010291259.1A CN111380101A (en) | 2020-04-14 | 2020-04-14 | Air source heating system suitable for high-humidity area and operation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010291259.1A CN111380101A (en) | 2020-04-14 | 2020-04-14 | Air source heating system suitable for high-humidity area and operation method thereof |
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| CN111380101A true CN111380101A (en) | 2020-07-07 |
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| CN202010291259.1A Pending CN111380101A (en) | 2020-04-14 | 2020-04-14 | Air source heating system suitable for high-humidity area and operation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112682842A (en) * | 2021-01-21 | 2021-04-20 | 陕西开普尔节能技术有限公司 | Clean energy balance transmission and distribution system |
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| CN105546875A (en) * | 2016-01-30 | 2016-05-04 | 山东创尔沃热泵技术股份有限公司 | Integrated system for air-cooled heat pump units |
| CN207674693U (en) * | 2017-08-18 | 2018-07-31 | 广东高而美制冷设备有限公司 | A kind of boiler of variable-volume suitable for air-conditioning system |
| CA3008508A1 (en) * | 2018-06-15 | 2019-12-15 | Godo A. Stoyke | Method and system for increasing the coefficient of performance of an air source heat pump using energy storage and stochastic control |
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2020
- 2020-04-14 CN CN202010291259.1A patent/CN111380101A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101457949A (en) * | 2007-12-13 | 2009-06-17 | 大连中星科技开发有限公司 | Domestic air source heat pump heating system and apparatus for coldness area |
| CN103851825A (en) * | 2012-12-08 | 2014-06-11 | 大连优力特换热设备制造有限公司 | Heat pump machine unit |
| CN105546875A (en) * | 2016-01-30 | 2016-05-04 | 山东创尔沃热泵技术股份有限公司 | Integrated system for air-cooled heat pump units |
| CN207674693U (en) * | 2017-08-18 | 2018-07-31 | 广东高而美制冷设备有限公司 | A kind of boiler of variable-volume suitable for air-conditioning system |
| CA3008508A1 (en) * | 2018-06-15 | 2019-12-15 | Godo A. Stoyke | Method and system for increasing the coefficient of performance of an air source heat pump using energy storage and stochastic control |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112682842A (en) * | 2021-01-21 | 2021-04-20 | 陕西开普尔节能技术有限公司 | Clean energy balance transmission and distribution system |
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