CN101344291A - High-efficiency energy-saving air conditioning system used for area cold supplying and its implementing method - Google Patents
High-efficiency energy-saving air conditioning system used for area cold supplying and its implementing method Download PDFInfo
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- CN101344291A CN101344291A CNA2008100302472A CN200810030247A CN101344291A CN 101344291 A CN101344291 A CN 101344291A CN A2008100302472 A CNA2008100302472 A CN A2008100302472A CN 200810030247 A CN200810030247 A CN 200810030247A CN 101344291 A CN101344291 A CN 101344291A
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Abstract
The invention provides a high-efficient and energy-saving air-conditioning system used for district cooling, which comprises a refrigeration host, a chilled water primary pump, a chilled water secondary pump, a plate heat exchanger, a new air processing device, a return air processing device, a new air pre-processing device, a user chilled water circulating pump and a total heat exchanger. The invention further provides a realization method of the air-conditioning system. The high-efficient and energy-saving air-conditioning system and the realization method of the invention are based on the second law of thermodynamics and the economic optimized scientific energy utilization principle, and realizes the purposes of increasing the temperature difference between the supply water and the return water of a chilled water secondary pipeline and reducing the flow rate thereof by the method of connecting two levels of refrigeration with the refrigeration host in series and the innovative cold energy gradual utilization of a tail-end device. Therefore, the energy consumption of the chilled water secondary pump and the initial investment of the secondary pipeline network are reduced, the economic benefits and the energy utilization ratio are improved, and the advantages of the district cooling system are further played.
Description
Technical field
The present invention relates to the high-efficiency energy-saving technology of air conditioning system for building, specifically be meant high-efficiency energy-saving air conditioning system and its implementation that a kind of cold that is suitable for district cooling utilizes step by step.
Background technology
At present, China's rapid economic development, the energy demand sharp increase, the imbalance between supply and demand of the energy is becoming increasingly acute.And reality on the other hand is that China's efficiency of energy utilization is far below developed country.Therefore, the effective way that solves the energy predicament of current China is to improve efficiency of energy utilization.China's building energy consumption accounts for 30% of national total energy consumption, and specific energy consumption is far above developed country; The heating ventilation air-conditioning system energy consumption accounts for 65% in the building use energy consumption, the energy-conservation key of being not only building energy conservation of heating ventilation air-conditioning system, and be the key that China realizes conservation-minded society.
Regional cold supply system is meant in order to satisfy the refrigeration duty demand of a plurality of buildings in a certain specific region, makes chilled water by special air conditioner refrigerating station centralized system, carry with cold building to each by the chilled water transmission and distribution network, thus the system that provides refrigeration to serve.Wherein, special air conditioner refrigerating station is called the district cooling station, the district cooling station is called the chilled water secondary pipe network to the chilled water transmission and distribution network between the user, for the chilled water pump of refrigeration host computer service is called pump of chilled water, chilled water is called the chilled water secondary pump by the district cooling station by the chilled water pump that secondary pipe network is delivered to each user in the district cooling station.Regional cold supply system has energy-saving and environmental protection, economic dispatch characteristics, and is since coming out from the sixties in 20th century, very extensive in all over the world application.In recent years, the district cooling technology of China also presents good development circumstances.
In the regional cold supply system, the initial cost of chilled water secondary pipe network and secondary pump, the energy consumption of secondary pump are the keys that can its advantage be given full play to.When carrying identical cold, the chilled water supply backwater temperature difference is big more, and chilled-water flow is more little; And the energy consumption of the initial cost of chilled water secondary pipe network and secondary pump, secondary pump all reduces with the minimizing of chilled-water flow.Therefore pass through to increase the supply backwater temperature difference of chilled water secondary pipe network, can be so that regional cold supply system has more advantage.
Except that the refrigeration host computer of particular design, at present, the chilled water supply and return water temperature of the refrigeration host computer on the market under declared working condition is 7/12 ℃, 5 ℃ of the temperature difference.Therefore, existing air-conditioning system adopts 5 ℃ of supply backwater temperature differences as its chilled water usually.When chilled water is 5 ℃ of temperature difference, adopt summer the dehumidification by condensation mode that air is lowered the temperature and dehumidifying, remove the sensible heat and the latent heat load of air-conditioning and construction simultaneously.And, be to new wind, return air, or the wind that mixes of new wind and return air all is to adopt about 7 ℃ chilled water to handle.In fact, for removing indoor sensible heat load, chilled water temperature is 16～19 ℃ and just can meets the demands, and just needs the chilled water of lower temperature when having only dehumidifying.Like this, just caused the waste on the high-grade cryogenic energy utilization.
Low-temperature receiver is meant the equipment that cold is provided for air-conditioning system.When not adopting the cold-storage technology, regional cold supply system provides whole institutes chilling requirement by refrigeration host computer.Refrigeration host computer is produced cold energy by consumed power or heat energy, wherein with electric power as electric refrigeration host computer of being called of drive energy, be called the absorption refrigeration main frame with heat energy as drive energy.When chilled water secondary pipe network in the regional cold supply system adopted 5 ℃ supply backwater temperature difference, the supply backwater temperature difference of refrigeration host computer also was 5 ℃ in the district cooling station; Refrigeration host computer platform number surpasses at 1 o'clock, and refrigeration host computer adopts and is arranged in parallel mode, and the supply and return water temperature of all refrigeration host computers is all identical.The minimum outlet temperature of common electric refrigeration host computer chilled water is 4 ℃, and the minimum outlet temperature of absorption refrigeration main frame is 5 ℃.When not adopting the ice cold-storage, for the situation of 7/12 ℃ of chilled water supply and return water temperature (Δ t=5 ℃), by supply water temperature is reduced by 2～3 ℃, return water temperature improves 3～7 ℃, can make chilled water secondary pipe network supply backwater temperature difference be enlarged to 14～15 ℃.Increase at chilled water secondary pipe network supply backwater temperature difference, and be under the more situation of return water temperature rising, the cold that this adopts the air-conditioning system of what form to utilize chilled water to carry, how to produce the chilled water of the big temperature difference, be the insurmountable problem of existing air-conditioning system, must develop new air-conditioning system and just might realize.
Summary of the invention
The objective of the invention is to overcome the shortcoming and defect of above-mentioned prior art, a kind of high-efficiency energy-saving air conditioning system that is used for district cooling is provided, this air-conditioning system can increase chilled water secondary pipe network supply backwater temperature difference, reduce the investment of secondary pipeline and the energy consumption of secondary pump, the cold that can scientifically utilize the chilled water of the big temperature difference to carry.
Another object of the present invention is to provide the above-mentioned implementation method that is used for the high-efficiency energy-saving air conditioning system of district cooling.
Purpose of the present invention is achieved through the following technical solutions: a kind of high-efficiency energy-saving air conditioning system that is used for district cooling comprises refrigeration host computer, pump of chilled water, chilled water secondary pump, plate type heat exchanger, new wind treatment facility, return air treatment facility, new wind pre-processing device, user's chilled water circulating pump, total-heat exchanger; Described refrigeration host computer, pump of chilled water, chilled water secondary pump, plate type heat exchanger cold side seal connection successively by chilled water pipe, constitute to reach the chilled water loop of district cooling station to the user in the district cooling station; Described new wind treatment facility, return air treatment facility, new wind pre-processing device, the hot side of plate type heat exchanger, user's chilled water circulating pump also seal connection successively by chilled water pipe, constitute the chilled water loop of user inside.
The series connection of employing refrigeration host computer, the method for two-stage refrigeration is come the bigger chilled water of the production temperature difference.Exactly 2 refrigeration host computers are connected in series specifically, every refrigeration host computer is realized a part of chilled water temperature difference, and the confession of chilled water, backwater temperature difference can reach 14～15 ℃.When the platform number of refrigeration host computer in the regional cold supply system surpasses 2, can adopt earlier per 2 refrigeration host computers are connected, the arrangement of the refrigeration host computer parallel connection after then will connecting again obtains the chilled water of the big temperature difference.Refrigeration host computer platform number in the regional cold supply system is necessary for even number.
A kind of implementation method that is used for the high-efficiency energy-saving air conditioning system of district cooling, comprise the steps: that low-temperature receiver part produces the chilled water of the big temperature difference by the refrigeration host computer two-stage refrigeration of series connection, then the chilled water of the big temperature difference is delivered to and is arranged on the plate type heat exchanger of user in building, cool off by the chilled water backwater of plate type heat exchanger to user's interior of building; End portion is separated new wind and is handled with indoor return air, new wind is different with the chilled water temperature of return air treatment facility; Wherein new wind changes cold for three grades: outdoor new wind changes cold by total-heat exchanger and indoor air draft earlier; Secondly, the new wind that comes out from total-heat exchanger enters new wind pre-processing device, changes cold with the chilled water backwater of the outflow of return air treatment facility; The 3rd, enter new wind treatment facility through the new cooled new wind of wind pre-processing device, utilize the lower chilled water of temperature that new wind is carried out dehumidifying and cooling, the new wind of handling well is at last sent into air-conditioned room; Indoor return air is handled by the return air treatment facility, and the chilled water inlet temperature of return air treatment facility is the chilled water outlet temperature of new wind treatment facility.
The temperature range of the chilled water of the described big temperature difference is 14～15 ℃.
Theoretical foundation of the present invention be based on the second law of thermodynamics and
The science that economics is optimized energy principle, its cold of mainly realizing air-conditioning system utilizes step by step, in same indoor heat, humidity load, and keep under the prerequisite of identical comfortableness, this air-conditioning system is connected by refrigeration host computer, and terminal cold utilizes step by step, has realized that the chilled water return water temperature raises, confession, backwater temperature difference strengthen, and chilled-water flow reduces.
The present invention compared with prior art, have following advantage and beneficial effect: the present invention is from the angle of science with energy, by refrigeration host computer series connection two-stage refrigeration, end-equipment innovation with cooling method strengthen chilled water secondary pipeline supply backwater temperature difference, reduce its flow, thereby reduce the energy consumption of secondary pump and the initial cost of secondary pipe network; Because return water temperature raises more near environment temperature, make that chilled water dwindles with the difference of environment temperature in the secondary pipeline, thereby the reduction of cold damage; Return water temperature is higher, can improve in the cascade refrigeration main frame, handles the COP of the upstream refrigeration unit of the higher temperature difference.Like this, adopt this air-conditioning system after, more can bring into play the advantage of regional cold supply system, further increase economic efficiency and efficiency of energy utilization, effects of energy conservation and environmental protection is obvious.
Description of drawings
Fig. 1 is a kind of structural representation that is used for the high-efficiency energy-saving air conditioning system of district cooling of the present invention.
Fig. 2 is a kind of schematic diagram that is used for another structure of high-efficiency energy-saving air conditioning system of district cooling of the present invention.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment 1
Fig. 1 shows concrete structure of the present invention, as seen from Figure 1, the high-efficiency energy-saving air conditioning system that originally is used for district cooling comprises refrigeration host computer, pump of chilled water, chilled water secondary pump, plate type heat exchanger, new wind treatment facility, return air treatment facility, new wind pre-processing device, user's chilled water circulating pump, total-heat exchanger; Described refrigeration host computer, pump of chilled water, chilled water secondary pump, plate type heat exchanger cold side seal connection successively by chilled water pipe, constitute to reach the chilled water loop (low-temperature receiver part) of district cooling station to the user in the district cooling station; Described new wind treatment facility, return air treatment facility, new wind pre-processing device, the hot side of plate type heat exchanger, user's chilled water circulating pump also seal connection successively by the chilled water return pipe, constitute the chilled water loop (end portion) of user inside; The quantity of described refrigeration host computer is 2, and 2 refrigeration host computers are connected in series, and carries out the two-stage refrigeration, and every refrigeration host computer is born a part of chilled water temperature difference, thereby can produce the bigger chilled water of the temperature difference, and its temperature difference can reach 14～15 ℃.
This air-conditioning system is performed such cold and utilizes, improves chilled water secondary pipe network supply backwater temperature difference step by step: the temperature that the refrigeration host computer of low-temperature receiver part is produced is t
Su1Chilled water supply water, the plate type heat exchanger in the chilled water secondary pump is transported to each user's building carries out heat exchange with the chilled water of user inside, temperature is increased to t
Re1After get back to refrigeration unit.In user inside, temperature is t
Su2Chilled water supply water at first enter new wind treatment facility with through the new cooled new air heat-exchange of wind pre-processing device, temperature is increased to t
M2, entering return air treatment facility and return air heat exchange then, temperature further is increased to t
M3, the new air heat-exchange after then entering new wind pre-processing device again and handling through total-heat exchanger, the temperature of chilled water is increased to t the most at last
Re2After return plate type heat exchanger and carry out heat exchange from the chilled water at district cooling station, with chilled water by t
Re2Be reduced to supply water temperature t
Su2This air-conditioning system is separated new wind and is handled with indoor return air, new wind is different with the chilled water temperature of return air treatment facility.Wherein new wind changes cold treatment by three grades and sends into the room to required state: at first, outdoor new wind changes cold by total-heat exchanger and indoor air draft; Secondly, the new wind that comes out from total-heat exchanger changes cold with chilled water from the outflow of return air treatment facility in new wind pre-processing device; The 3rd, the chilled water that temperature is lower carries out dehumidifying and cooling to the new cooled new wind of wind pre-processing device of warp in new wind treatment facility.Indoor return air carries out cooling and dehumidifying by the return air treatment facility, and the chilled water inlet temperature of return air treatment facility is the chilled water outlet temperature of new wind treatment facility.
The specific design parameter and the computational process of this air-conditioning system are as follows:
The design refrigeration duty of regional cold supply system is 12700kW, and the total cooling decimal of cooling system in season is 3200h, amounts to oepration at full load hourage 1940h, chilled water fed distance 800m.User's indoor design parameter: 25 ℃ of dry-bulb temperatures, relative humidity 60%.The outdoor air design parameter is: 34.2 ℃ of dry-bulb temperatures, 27.8 ℃ of wet-bulb temperature.Total resh air requirement in user's building is 827529m
3/ h, the air draft total amount is 80% of a new wind total amount.
1, the chilled water secondary pipe network adopts each parameter of regional cold supply system of 5 ℃ of temperature difference:
Low-temperature receiver partly adopts the refrigeration host computer parallel connection of 2 specified refrigerating capacity 7032kW, and the chilled water of every refrigeration host computer is imported and exported water temperature and is 11/6 ℃, 5 ℃ of the temperature difference, and the actual refrigerating capacity of refrigeration host computer is 6350kW, and COP is 5.73.2 of pumps of chilled water, every flow 1092m
3/ h, lift 18m, power 76kW.When refrigeration duty changes, a pump constant flow operation of chilled water.
The supply water temperature of chilled water secondary pipe network is t
Su1, a=6 ℃, return water temperature is t
Re1, a=11 ℃, supply and return water temperature difference Δ t
1, a=5 ℃, the internal diameter 600mm of chilled water secondary pipe network, the flow velocity 2.15m/s of water; 2 of secondary pumps, every flow 1092m
3/ h, lift 28m, power 118kW.When refrigeration duty changes, the operation of chilled water secondary pump variable flow.
User's chilled water system supply water temperature is t
Su2, a=7 ℃, return water temperature is t
Re2, a=12 ℃, supply and return water temperature difference Δ t
2, a=5 ℃; 2 of user's chilled water circulating pumps, every flow 1092m
3/ h, lift 24m, power 100kW; The terminal primary air fan-coil system that adopts routine of user, fan coil is 7/12 ℃ with the chilled water Inlet and outlet water temperature of new blower fan group.It is cold to adopt full heat recovery equipment that new wind and air draft are changed.Total effectively heat transfer area of the new blower fan group that the user is inner all is 2476.0m
2, total effectively heat transfer area of handling the fan coil of return air is 1066.5m
2, total effectively heat transfer area sum of terminal new blower fan group of user and fan coil is 13136.4m
2
2, each parameter of air-conditioning system of the present invention is as follows:
Low-temperature receiver partly adopts the refrigeration host computer series connection of 2 specified refrigerating capacity 7032kW, and the refrigeration host computer chilled water import and export water temperature that is in the upstream after optimizing is 19/11.83 ℃, and actual refrigerating capacity is 6510kW, and COP is 6.70; The refrigeration host computer chilled water import and export water temperature that is in the downstream is 11.83/5 ℃, and actual refrigerating capacity is 6190kW, and COP is 5.65.
The supply water temperature of chilled water secondary pipe network is t
Su1=5 ℃, return water temperature is t
Re1=19 ℃, supply and return water temperature difference Δ t
1=14 ℃.
User's chilled water system supply water temperature is t
Su2=6 ℃, return water temperature is t
Re2=20 ℃, supply and return water temperature difference Δ t
2=14 ℃.
After the chilled water supply backwater temperature difference is increased to 14 ℃ by 5 ℃, total effectively heat transfer area of the power of the power of the caliber of the power consumption of refrigeration host computer, secondary pipeline and investment, pump of chilled water, chilled water secondary pump, the investment of the chilled water pipeline of user inside, user's chilled water circulating pump, terminal each treatment facility of user all will change, and advance analysis and will calculate with regard to these aspects below.
(1) power consumption of refrigeration host computer
Following table adopts the comparison of refrigeration host computer power consumption in the regional cold supply system of 5 ℃ of temperature difference and the air-conditioning system of the present invention for the chilled water secondary pipe network.
The refrigeration host computer power consumption relatively in the regional cold supply system of 5 ℃ of temperature difference of table 1 chilled water secondary pipe network employing and the air-conditioning system of the present invention
| The chilled water secondary pipe network adopts the regional cold supply system of 5 ℃ of temperature difference | Air-conditioning system of the present invention | |
| Refrigeration host computer 1 electrical power (kW) | 1108 | 971.6 |
| Refrigeration host computer 2 electrical power (kW) | 1108 | 1095.6 |
| Refrigeration host computer gross electric capacity (kW) | 2216 | 2067.2 |
| Refrigeration host computer year power consumption (kWh/a) | 4,299,040 | 4,010,368 |
| Refrigeration host computer year power consumption saving | Benchmark | 6.71％ |
(2) pump power of chilled water
After the temperature difference of chilled water was elevated to 14 ℃ by 5 ℃, because the refrigeration host computer arranged in series is only established pump of 1 chilled water, the parameter change of pump was: flow 780m
3/ h, lift 26m, power 78kW.
(3) caliber of chilled water secondary pipeline and investment
20% of on-way resistance is got in the local resistance of chilled water secondary pipeline.When the changes in flow rate of secondary pipeline, it is constant to establish steel pipe equivalent roughness, and keeping the drag overall of pipeline constant by the way of adjusting caliber (is Δ P
1=Δ P
2).The variation relation of caliber and flow can be derived by hydromechanical correlation formula:
If corresponding to Δ t
1, aThe volume flow of the chilled water in the time of=5 ℃ is L
1(m
3/ s), then as Δ t
1In the time of=14 ℃, its volume flow is L
2=0.357L
1(m
3/ s), d
2=0.675d
1=0.675 * 600=405mm.Therefore, after the temperature of chilled water secondary pipeline was elevated to 14 ℃ by 5 ℃, flow reduced 64.3%; It is constant to keep drag overall by the method for adjusting caliber, and caliber reduces 32.5%.
The investment of chilled water secondary pipeline is directly proportional with caliber, so the investment of chilled water secondary pipeline also reduces by 32.5%.
(4) chilled water secondary pump power
After the temperature difference of chilled water is elevated to 14 ℃ by 5 ℃, owing to the drag overall of keeping secondary pipe network by the method for adjusting caliber is constant, so secondary pump lift and efficient can be considered by not changing.The electrical power of secondary pump reduces and reduces with flow: N
Sp2=0.357N
Sp1, i.e. the power reduction 64.3% of secondary pump.
Also adopt 2 secondary pumps after the changes in flow rate, the parameter change of every pump is: flow 390m
3/ h, lift 28m, power 42kW.
(5) investment of the chilled water pipeline of user inside and user's chilled water circulating pump power
In the air-conditioning system of the present invention, the supply backwater temperature difference of the chilled water of user inside is also by Δ t
2, a=5 ℃ are increased to Δ t
2=14 ℃, Changing Pattern is identical with the chilled water secondary pipe network.Therefore, with respect to the regional cold supply system of 5 ℃ of temperature difference of chilled water secondary pipe network employing, the caliber of the chilled water pipeline of user inside reduces 32.5%, and its investment reduces by 32.5%; The power reduction 64.3% of user's chilled water circulating pump.
User's chilled water circulating pump also adopts 2 after the changes in flow rate, and the parameter change of every pump is: flow 390m
3/ h, lift 24m, power 35.7kW.
(6) terminal each treatment facility of user
As calculated, new wind treatment facility, return air treatment facility, new wind pre-processing device total effectively heat transfer area separately is respectively 3629.6m in the air-conditioning system of the present invention
2, 10246.9m
2, 1050.2m
2Total effectively heat transfer area sum of terminal all treatment facilities of user is 14926.7m
2, adopt the total effectively heat transfer area sum of terminal each treatment facility of user of the regional cold supply system of 5 ℃ of temperature difference to increase by 13.63% than chilled water secondary pipe network.
3, adopt air-conditioning system of the present invention and chilled water secondary pipe network to adopt the Technological Economy of the regional cold supply system of 5 ℃ of temperature difference to compare
Regarding to embodiment 1 down adopts air-conditioning system of the present invention and chilled water secondary pipe network to adopt the regional cold supply system of 5 ℃ of temperature difference to carry out Technological Economy relatively respectively.For the ease of contrast, only more different parts, same section is not listed.If electricity price be 0.9 yuan/(kWh).
(1) investment part
Table 2 chilled water secondary pipe network adopts the regional cold supply system and the air-conditioning system of the present invention investment contrast of 5 ℃ of temperature difference
| The chilled water secondary pipe network adopts the regional cold supply system of 5 ℃ of temperature difference | Air-conditioning system of the present invention | |
| A pump investment of chilled water (ten thousand yuan) | 31 | 16 |
| Chilled water secondary pipe network investment (ten thousand yuan) | 368 | 248.4 |
| Chilled water secondary pump investment (ten thousand yuan) | 52 | 18.6 |
| User's chilled water pipe investment (ten thousand yuan) | 100 | 67.5 |
| User's chilled water circulating pump investment (ten thousand yuan) | 46 | 16.4 |
| The terminal investment of user (ten thousand yuan) | 341.6 | 388.1 |
| Gross investment (ten thousand yuan) | 938.6 | 755 |
| Gross investment is saved | Benchmark | 19.56％ |
(2) operation power consumption and electricity charge part
Table 3 chilled water secondary pipe network adopts regional cold supply system and the air-conditioning system of the present invention operation power consumption and the electricity charge contrast of 5 ℃ of temperature difference
| The chilled water secondary pipe network adopts the regional cold supply system of 5 ℃ of temperature difference | Air-conditioning system of the present invention | |
| Refrigeration host computer year power consumption (kWh/a) | 4299040 | 4010368 |
| A pump year of chilled water power consumption (kWh/a) | 486400 | 249600 |
| Chilled water secondary pump year power consumption (kWh/a) | 457840 | 162960 |
| User's chilled water circulating pump year power consumption (kWh/a) | 388000 | 138516 |
| Total year power consumption (kWh/a) | 5631280 | 4561444 |
| Total year power consumption is saved | Benchmark | 19.00％ |
| The electricity charge of refrigeration host computer year (ten thousand yuan/a) | 386.9 | 376.4 |
| Pump year electricity charge of chilled water (ten thousand yuan/a) | 43.8 | 22.5 |
| The year electricity charge of chilled water secondary pump (ten thousand yuan/a) | 41.2 | 14.7 |
| The year electricity charge of user's chilled water circulating pump (ten thousand yuan/a) | 34.9 | 12.5 |
| Total year electricity charge (ten thousand yuan/a) | 506.8 | 410.5 |
| Total year electricity charge are saved | Benchmark | 19.00％ |
From table 2,3 as can be known, air-conditioning system of the present invention is in investment or is all having more advantage than prior art aspect the operation electricity charge.
Embodiment 2
The concrete structure of present embodiment as shown in Figure 2, except that following characteristics with embodiment 1: the quantity of described refrigeration host computer is 4, earlier per 2 refrigeration host computers is connected, and the arrangement of the refrigeration host computer parallel connection after then will connecting again obtains the chilled water of the big temperature difference.
The foregoing description is a preferred implementation of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under spiritual essence of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (5)
1, a kind of high-efficiency energy-saving air conditioning system that is used for district cooling is characterized in that: comprise refrigeration host computer, pump of chilled water, chilled water secondary pump, plate type heat exchanger, new wind treatment facility, return air treatment facility, new wind pre-processing device, user's chilled water circulating pump, total-heat exchanger; Described refrigeration host computer, pump of chilled water, chilled water secondary pump, plate type heat exchanger cold side seal connection successively by chilled water pipe, constitute to reach the chilled water loop of district cooling station to the user in the district cooling station; Described new wind treatment facility, return air treatment facility, new wind pre-processing device, the hot side of plate type heat exchanger, user's chilled water circulating pump also seal connection successively by chilled water pipe, constitute the chilled water loop of user inside.
2, the high-efficiency energy-saving air conditioning system that is used for district cooling according to claim 1, it is characterized in that: described refrigeration host computer is many, per two refrigeration host computers series connection, the refrigeration host computer after then will connecting again is arranged in parallel.
3, the high-efficiency energy-saving air conditioning system that is used for district cooling according to claim 2 is characterized in that: described refrigeration host computer is 2, and 2 refrigeration host computers are connected in series.
4, the implementation method that is used for the high-efficiency energy-saving air conditioning system of district cooling according to claim 1, it is characterized in that: the low-temperature receiver part is produced the chilled water of the big temperature difference by 2 refrigeration host computer two-stage refrigeration of series connection, then the chilled water of the big temperature difference is delivered to and is arranged on the plate type heat exchanger of user in building, cool off by the chilled water backwater of plate type heat exchanger to user's interior of building; End portion is separated new wind and is handled with indoor return air, new wind is different with the chilled water temperature of return air treatment facility; Wherein new wind changes cold for three grades: at first, outdoor new wind changes cold by total-heat exchanger and indoor air draft; Secondly, the new wind that comes out from total-heat exchanger enters new wind pre-processing device, changes cold with the chilled water backwater of the outflow of return air treatment facility; The 3rd, enter new wind treatment facility through the new cooled new wind of wind pre-processing device, utilize the lower chilled water of temperature that new wind is carried out dehumidifying and cooling, the new wind of handling well is at last sent into air-conditioned room; Indoor return air is handled by the return air treatment facility, and the chilled water inlet temperature of return air treatment facility is the chilled water outlet temperature of new wind treatment facility.
5, the implementation method that is used for the high-efficiency energy-saving air conditioning system of district cooling according to claim 4 is characterized in that: the temperature range of the chilled water of the described big temperature difference is 14～15 ℃.
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| CN104896795A (en) * | 2015-06-01 | 2015-09-09 | 北京京能未来燃气热电有限公司 | Centralized heating and cooling system realizing cold-hot pipe network integration |
| CN106152324A (en) * | 2015-04-14 | 2016-11-23 | 上海春至新能源科技有限公司 | The big temperature difference and part auxiliary air independent humidity control air conditioning system |
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| CN108197791A (en) * | 2017-12-27 | 2018-06-22 | 江苏华复保利环保科技有限公司 | Data center's energy supervision method based on the cooling of refrigeration plant technology |
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| CN110878957A (en) * | 2019-12-23 | 2020-03-13 | 北京市热力集团有限责任公司 | Urban heat energy comprehensive utilization system and method |
| CN111125938A (en) * | 2020-01-15 | 2020-05-08 | 华南理工大学 | Suboptimal algorithm-based optimization design method for large central air-conditioning chilled water pipe network |
| CN112050379A (en) * | 2020-09-04 | 2020-12-08 | 中筑科技股份有限公司 | Energy-saving optimized operation control system of regionalized air conditioning system |
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2008
- 2008-08-19 CN CN2008100302472A patent/CN101344291B/en not_active Expired - Fee Related
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| CN110878957A (en) * | 2019-12-23 | 2020-03-13 | 北京市热力集团有限责任公司 | Urban heat energy comprehensive utilization system and method |
| CN111125938A (en) * | 2020-01-15 | 2020-05-08 | 华南理工大学 | Suboptimal algorithm-based optimization design method for large central air-conditioning chilled water pipe network |
| CN111125938B (en) * | 2020-01-15 | 2021-07-16 | 华南理工大学 | Suboptimal algorithm-based optimization design method for large central air-conditioning chilled water pipe network |
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| CN112797522A (en) * | 2020-12-31 | 2021-05-14 | 珠海横琴能源发展有限公司 | Large-temperature-difference refrigeration system for centralized energy station |
| CN113790488A (en) * | 2021-09-24 | 2021-12-14 | 珠海格力电器股份有限公司 | Area cooling unit, cooling system, cooling method, and readable storage medium |
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