CN214249930U - A subregion formula energy station for regional cooling - Google Patents
A subregion formula energy station for regional cooling Download PDFInfo
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- CN214249930U CN214249930U CN202120165651.1U CN202120165651U CN214249930U CN 214249930 U CN214249930 U CN 214249930U CN 202120165651 U CN202120165651 U CN 202120165651U CN 214249930 U CN214249930 U CN 214249930U
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Abstract
The utility model provides a pair of a subregion formula energy source station for regional cooling, the regional cooling of mainly used building crowd, each building in building crowd is with the energy unit all set up the utility model discloses a subregion formula energy station, can satisfy building crowd's the regional cooling demand in summer, certain or a plurality of subregion formula energy station in the building crowd can provide the refrigerated water to all the other certain or a plurality of subregion formula energy stations through concentrating the cooling pipeline, also can acquire the refrigerated water from all the other certain or a plurality of subregion formula energy stations through concentrating the cooling pipeline, and then realize building crowd's regional cooling with a plurality of subregion formula energy stations, and not construct large-scale concentrated energy source station, reduced building crowd cooling water set and its supporting facility's initial investment, improve equipment utilization and efficiency.
Description
Technical Field
The utility model belongs to the energy supply system, concretely relates to a subregion formula energy station for regional cooling.
Background
Conventional building air conditioning system sets up the refrigeration station to an energy unit for building, prepares air conditioner refrigerated water, and rethread circulating water pipe system provides the refrigerated water to the terminal system of air conditioner of this energy unit for building, to a building crowd, needs each energy unit for building self configuration refrigeration station promptly to satisfy the air conditioner demand of each energy unit for building. And regional cooling is to set up concentrated energy source station to a large area scope's building crowd, prepares air conditioner refrigerated water, and rethread circulating water pipe system provides the refrigerated water to each building energy consumption unit air conditioner end system. Wherein, contained a plurality of monomer buildings in the building crowd, a monomer building probably is a building energy unit, also probably because the function is different, divides into a plurality of building energy units, and when several monomer buildings's function is the same and adjacent, also probably is a building energy unit, in a word, has contained a plurality of building energy units in certain regional building crowd.
According to technical measures of civil architectural engineering design across the country-heating ventilation air conditioning power (2009), (1) regarding cold source equipment selection of conventional air conditioning systems, clause 6.1.5: when the installed capacity of the water chilling unit is determined, the probability that the peak load of air conditioners in rooms with different orientations and different purposes simultaneously appears and the difference of the working conditions of the air conditioners of various buildings are fully considered, and the air conditioner load is multiplied by a correction coefficient smaller than 1, wherein the correction coefficient can be 0.70-0.90 generally; the lower limit is preferably taken when the building is large in scale, and the upper limit is preferably taken when the building is small in scale; (2) with respect to zone cooling, item 6.3.4: when the capacity is calculated, the simultaneous use coefficient and the non-guarantee rate are determined according to the function and the cold use characteristic of each subarea. In general, the coefficient of co-usage is preferably 0.5 to 0.8.
It can be known that the cold source equipment model selection correction coefficient of the conventional air conditioning system can be generally 0.70-0.90, the cold source equipment model selection correction coefficient (the use coefficient) of the regional cold supply can be 0.5-0.8, and in general, the installed capacity of the cold source for the regional cold supply is smaller than the total installed capacity of energy consumption units of each building when cold sources are dispersedly arranged, so that the initial investment of a water chilling unit and supporting facilities thereof is reduced, the water chilling unit can be kept to work under a high load rate, and high energy efficiency is kept.
For the scheme selection of building group cooling, theoretically, compared with the method that water chilling units are dispersedly arranged in each building energy consumption unit, the regional cooling mode has obvious investment and operation advantages, but still has more problems in practice, and mainly comprises the following steps: (1) the energy-saving system has the advantages that the energy-saving system is characterized in that the energy-saving energy station is used for conveying air-conditioning chilled water to each energy-consuming building unit, and a water supply and return pipe for conveying and distributing the air-conditioning chilled water needs to be newly built, so that the system investment is increased; (2) the building groups with large area range are often not built and put into use at the same time, and the corresponding scale can be realized after years of development generally, but the corresponding construction scale and equipment investment need to be planned at the initial stage of the regional cooling mode, so that the operation economy at the initial stage of regional construction is poor, and the investment recovery is not facilitated.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a subregion formula energy source station for regional cooling, the regional cooling of mainly used building crowd, each building in building crowd is with the energy unit all set up the utility model discloses a subregion formula energy source station can utilize building crowd's concentrated cooling pipeline to realize the refrigerated water UNICOM of each subregion formula energy source station each other, and then realizes building crowd's regional cooling, reduces building crowd cooling water set and its supporting facility's initial investment, improves the flexibility of energy station construction under the regional cooling mode, improve equipment utilization and efficiency.
In order to achieve the above purpose, the utility model adopts the technical proposal that:
a zoned energy station for district cooling, comprising: the system comprises an air conditioner tail end system water return pipe interface, a first stop valve, a second stop valve, a water collector, a water distributor, a first circulating water pump, a water chilling unit, a concentrated cold supply water return pipe interface, a concentrated cold supply water supply pipe interface, an air conditioner tail end system water supply pipe interface, a third stop valve, a fourth stop valve, a second circulating water pump and a fifth stop valve;
the chilled water outlet of the water chilling unit is connected with a first circulating water pump, the first circulating water pump is connected with the water inlet of a water distributor, the water outlet of the water distributor is connected with a third stop valve, the third stop valve is connected with a water supply pipe interface of an air conditioner tail end system, the water distributor is also connected with a fifth stop valve, the fifth stop valve is connected with a fourth stop valve and the water inlet of a second circulating water pump, the water outlet of the second circulating water pump is connected with the water inlet of a check valve, and the water outlets of the fourth stop valve and the check valve are connected with a centralized cooling water supply pipe interface;
the interface of a water return pipe of the air conditioner tail end system is connected with a second stop valve, the second stop valve is connected with a water inlet of a water collector, a water outlet of the water collector is connected with a chilled water return port of a water chilling unit, the water collector is also connected with a first stop valve, and the first stop valve is connected with an interface of a concentrated cooling and water supply return pipe;
the system comprises a water supply pipe connector, an air conditioner tail end system water return pipe connector, an air conditioner water supply pipe connector and a water supply pipe connector, wherein the water supply pipe connector is connected with the air conditioner tail end system;
the interface of the concentrated cooling water return pipe and the interface of the concentrated cooling water supply pipe are respectively used for connecting the concentrated cooling water return pipe and the concentrated cooling water supply pipe.
The port of the first stop valve, which is connected with the water collector, can be a water inlet or a water outlet, and is converted according to the use requirement; the port of the fifth stop valve, which is connected with the water separator, can be a water inlet or a water outlet, and is converted according to the use requirement;
when the port of the first stop valve connected with the water collector is a water inlet, the port of the fifth stop valve connected with the water distributor is a water outlet; when the port of the first stop valve connected with the water collector is a water outlet, the port of the fifth stop valve connected with the water distributor is a water inlet;
the flow rate of the chilled water passing through the first stop valve is the same as that of the chilled water passing through the fifth stop valve, and the flow rate of the chilled water passing through the return water pipe joint of the air-conditioning tail end system is the same as that of the chilled water passing through the feed water pipe joint of the air-conditioning tail end system.
The water chilling unit can be a screw water chilling unit, a centrifugal water chilling unit or an absorption water chilling unit, and the number of the water chilling units can be single or multiple.
The partitioned energy station is suitable for supplying cold to a building group in an area, the building group comprises a plurality of building energy using units, each building energy using unit is provided with one partitioned energy station, and the partitioned energy stations are connected with a concentrated cold supply water return pipe and a concentrated cold supply water feed pipe together to realize chilled water interconnection;
TZZ-TZWwhen the number of the cooling days is less than or equal to 120, the time for putting each partitioned energy station into use is relatively uniform, and the total installed capacity V of the water chilling unit of the partitioned energy station of the nth building energy unitn＝Qmn×K；
K＝Q/(Qm1+Qm2……+Qm(n-1)+Qmn) Or K is taken as a value between 0.5 and 0.8 according to the dispersion degree of the building modes served by all the building energy units in the building group;
TZZ-TZWwhen the number of the cooling days is more than 120, the time for putting each partitioned energy station into use is considered to be relatively dispersed, and the total installed capacity V of the water chilling unit of the partitioned energy station of the nth building energy unitn＝Qmn×Kn；
Kn＝Qn/QmnOr according to the degree of dispersion of the building states serviced by the building energy units, KnBetween 0.7 and 0.9;
TZZthe building energy units in the building group are put into use for the earliest time;
TZWthe latest input service time of the building energy units in the building group is obtained;
n is the number of building energy units in the building group;
q is the cooling capacity consumed by the air-conditioning end systems of all the building energy utilization units in the building group in the unit time during the cooling peak time of the building group;
Qnthe cold energy consumed by the air-conditioning tail end system of the nth building energy consumption unit in the unit time during the cold supply peak time of the building energy consumption unit;
Vnis the nth building energyThe total installed capacity of the chiller of the zoned energy station of the unit;
Qmnthe maximum cooling load of the nth building energy unit;
k is a simultaneous use coefficient of the building group;
Knthe coefficient is used for the nth building energy unit at the same time.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a subregion formula energy station for regional cooling, the regional cooling of mainly used building crowd. When each building energy consumption unit in the building group is provided with the partitioned energy source station, chilled water of each partitioned energy source station can be communicated with each other by utilizing a concentrated cooling pipeline of the building group, namely, one or more partitioned energy source stations in the building group can provide redundant chilled water for one or more other partitioned energy source stations through the concentrated cooling pipeline; roles between each partitioned energy station can change, both can carry the unnecessary refrigerated water of self on concentrated cooling pipeline, can acquire the refrigerated water from concentrated cooling pipeline again when self refrigerated water is not enough, and then connect in parallel through a plurality of partitioned energy stations and realize the regional cooling of building crowd.
Furthermore, the conventional regional cooling adopts a mode of a centralized energy source station, the centralized energy source station is configured with the capacity of a total water chiller assembling machine of a building group and corollary equipment thereof, the occupied area scale is large, the investment of the water chiller and the corollary equipment thereof is high once, but in actual life, the building group of a certain region is gradually formed, all building energy consumption units in the building group have different construction time sequences, namely the time sequences for putting into operation and needing air conditioning cooling are not consistent, the partitioned energy source station can realize synchronous construction with all building energy consumption units according to the construction time sequences of all building energy consumption units in the building group, and large-scale construction according to the total installed capacity of the water chiller of the building group is not needed at the initial development stage of the building group.
Furthermore, each building energy consumption unit in the building group adopts the partitioned energy source station of the utility model, when the water chilling unit of a certain partitioned energy source station in the building group has operation failure, other partitioned energy source stations can share the chilled water requirement of the partitioned energy source station, and the influence on the whole operation is small; and conventional air conditioning system mode, though each energy consumption unit for building has all set up subregion formula energy station, satisfy self cooling demand, but each subregion formula energy station in the building crowd does not carry out the interconnection, consequently, in case the cooling water set breaks down in certain subregion formula energy station in the building crowd, this energy consumption unit for building's air conditioner end system will not carry out the cooling, and the cooling water set at other subregion formula energy stations often all is in partial load and works down, still has the refrigeration surplus and can export.
Further, when air conditioning system carries out the cooling water set lectotype, cooling water machine kludge capacity equals cold load and multiplies coefficient of utilization simultaneously, when the energy unit is the monomer building for the building, its coefficient of utilization simultaneously generally can 0.70 ~ 0.90, and the utility model discloses a partitioned energy station not only is the energy unit service for the building, is that a plurality of partitioned energy stations are through concentrating the cooling pipeline interconnection, belongs to regional cooling on the whole, and coefficient of utilization when regional cooling generally can 0.5 ~ 0.8, can know, coefficient of utilization when regional cooling system generally is less than the coefficient of utilization when the energy unit for the building. Therefore, when building groups in the area are uniformly constructed and allocated with the partitioned energy stations, the water chilling unit selection of each partitioned energy station can adopt the utilization coefficient of the area for cooling at the same time, and the installed capacity of the water chilling unit is reduced.
Drawings
Fig. 1 is a schematic diagram of a zoned energy station for regional cooling according to the present invention;
fig. 2 is a schematic diagram of a regional cooling system based on partitioned energy station interconnection according to the present invention;
fig. 3 is a schematic diagram of the use of a district cooling system based on the interconnection of partitioned energy stations according to the present invention;
the energy-saving water-cooling system comprises an energy-using building unit 1, an air-conditioning end system 2, an air-conditioning end system water return pipe interface 3, a first stop valve 4, a second stop valve 5, a water collector 6, a water distributor 7, a first circulating water pump 8, a water chilling unit 9, a concentrated cooling water return pipe interface 10, a concentrated cooling water supply pipe interface 11, a concentrated cooling water supply pipe interface 12, an air-conditioning end system water supply pipe interface 12, a third stop valve 13, a fourth stop valve 14, a check valve 15, a second circulating water pump 16, a fifth stop valve 17, a concentrated cooling water supply pipe 18, a concentrated cooling water return pipe 19 and a partitioned energy source station 20.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The utility model discloses general idea is: the utility model provides a subregion formula energy source station for regional cooling, the regional cooling of mainly used building crowd, each building in building crowd is with the energy unit all set up the utility model discloses a subregion formula energy source station can utilize building crowd's concentrated cooling pipeline to realize the refrigerated water UNICOM of each subregion formula energy source station each other, and then realizes building crowd's regional cooling, reduces building crowd's cooling water set and its supporting facility's initial investment, improves the flexibility of energy station construction under the regional cooling mode, improve equipment utilization and efficiency.
For the purpose of illustrating the technical content and the construction and purpose of the present invention in detail, reference will now be made in detail to the accompanying drawings.
As shown in fig. 1, a partitioned energy source station for regional cooling is characterized in that: the system comprises an air conditioner tail end system water return pipe connector 3, a first stop valve 4, a second stop valve 5, a water collector 6, a water distributor 7, a first circulating water pump 8, a water chilling unit 9, a concentrated cold supply water return pipe connector 10, a concentrated cold supply water supply pipe connector 11, an air conditioner tail end system water supply pipe connector 12, a third stop valve 13, a fourth stop valve 14, a stop valve 15, a second circulating water pump 16 and a fifth stop valve 17;
the chilled water outlet of the water chilling unit 9 is connected with a first circulating water pump 8, the first circulating water pump 8 is connected with the water inlet of a water separator 7, the water outlet of the water separator 7 is connected with a third stop valve 13, the third stop valve 13 is connected with a water supply pipe interface 12 of an air conditioner tail end system, the water separator 7 is also connected with a fifth stop valve 17, the fifth stop valve 17 is connected with a fourth stop valve 14 and the water inlet of a second circulating water pump 16, the water outlet of the second circulating water pump 16 is connected with the water inlet of a check valve 15, and the water outlets of the fourth stop valve 14 and the check valve 15 are connected with a concentrated cold supply water pipe interface 11;
the air conditioner tail end system water return pipe connector 3 is connected with a second stop valve 5, the second stop valve 5 is connected with a water inlet of a water collector 6, a water outlet of the water collector 6 is connected with a chilled water return port of a water chilling unit 9, the water collector 6 is also connected with a first stop valve 4, and the first stop valve 4 is connected with a concentrated cooling and water supply water return pipe connector 10;
the system is provided with a plurality of air conditioner tail end system water return pipe interfaces 3 and a plurality of air conditioner tail end system water supply pipe interfaces 12, the number of the air conditioner tail end system water return pipe interfaces 3 is consistent with that of the air conditioner tail end system water supply pipe interfaces 12, the air conditioner tail end system water return pipe interfaces 3 and the air conditioner tail end system water supply pipe interfaces 12 are used for being connected with an air conditioner system tail end 2 of a building energy unit 1, and a closed chilled water circulation pipeline can be formed between the air conditioner system tail end 2 and a water chilling unit 9;
the concentrated cooling water return pipe joint 10 and the concentrated cooling water supply pipe joint 11 are respectively used for connecting a concentrated cooling water return pipe 19 and a concentrated cooling water supply pipe 18.
The port of the first stop valve 4 connected with the water collector 6 can be a water inlet or a water outlet, and is converted according to the use requirement; the port of the fifth stop valve 17 connected with the water separator 7 can be a water inlet or a water outlet, and the fifth stop valve is switched according to the use requirement;
when the port of the first stop valve 4 connected with the water collector 6 is a water inlet, the port of the fifth stop valve 17 connected with the water separator 7 is a water outlet; when the port of the first stop valve 4 connected with the water collector 6 is a water outlet, the port of the fifth stop valve 17 connected with the water separator 7 is a water inlet;
the flow rate of the chilled water passing through the first stop valve 4 is the same as that of the chilled water passing through the fifth stop valve 17, and the flow rate of the chilled water passing through the air-conditioning end system return water pipe joint 3 is the same as that of the chilled water passing through the air-conditioning end system feed water pipe joint 12.
The water chilling units 9 can be screw type water chilling units, centrifugal type water chilling units or absorption type water chilling units, and the number of the water chilling units 9 can be single or multiple.
The partitioned energy station 20 is suitable for supplying cold to a building group in an area, the building group comprises a plurality of building energy units 1, each building energy unit 1 is provided with one partitioned energy station 20, and the partitioned energy stations 20 are connected with a concentrated cold supply water return pipe 19 and a concentrated cold supply water supply pipe 18 together to realize chilled water interconnection;
the utility model discloses a use method that is used for regional refrigerated subregion formula energy station as follows:
fig. 2 is adopted the utility model discloses an area cooling system based on interconnection of subregion formula energy station, can know by fig. 2, to the building crowd in an area, there are more than two building energy units 1 such as A, B, C, D, E, F, G, H, the building crowd has been equipped with concentrated cooling feed pipe 18 and concentrated cooling wet return 19, a plurality of subregion formula energy stations 20 have been connected in parallel on concentrated cooling feed pipe 18 and concentrated cooling wet return 19, each subregion formula energy station 20 is connecting corresponding building energy unit 1 again. One or more of the zoned energy stations 20 can form a closed chilled water circulation loop with the remaining one or more of the zoned energy stations 20 through the concentrated cold feed water pipe 18 and the concentrated cold feed water return pipe 19.
In summer cooling, the work flow of each partitioned energy station 20 may be inconsistent, and there are mainly two cooling conditions: firstly, the amount of chilled water which can be provided by the partitioned energy station 20 is greater than the real-time cooling load of the building energy utilization unit 1 in which the partitioned energy station 20 is located, and the surplus chilled water can be conveyed to the centralized cooling water supply pipe 18; secondly, the amount of chilled water that sectional type energy station 20 can provide is less than the real-time cold load of this sectional type energy station 20 building energy consumption unit 1 of place, can follow and acquire the frozen water volume that lacks on concentrating the cold water supply pipe 18, and sectional type energy station 20 under the first kind of cooling operating mode can provide the chilled water to sectional type energy station 20 under the second kind of cooling operating mode promptly.
As shown in fig. 3, the utility model discloses a subregion formula energy station A provides the refrigerated water to subregion formula energy station B, for typical example concrete analysis, all the other subregion formula energy stations 20 only supply cold to the building that corresponds with energy unit 1 this moment, do not participate in the refrigerated water interconnection between the subregion formula energy station 20. In practice, the "zoned energy station A, B provides chilled water to the" zoned energy station C ", the" zoned energy station a provides chilled water to the "zoned energy station B, C", and so on, that is, one or more of the zoned energy stations 20 can provide chilled water to the remaining one or more of the zoned energy stations 20, and the operation process is similar to that of the typical example. Or when the cooling load of each building energy consumption unit 1 is not high, each partitioned energy station 20 only needs to supply cold to the corresponding air conditioner terminal system 2, does not obtain chilled water from the centralized cold supply water supply pipe 18, and does not convey chilled water to the centralized cold supply water supply pipe 18.
Cooling working conditions of the partitioned energy station A are as follows:
the fourth stop valve 14 is closed, the first stop valve 4, the second stop valve 5, the third stop valve 13 and the fifth stop valve 17 are opened, and then the first circulating water pump 8, the water chilling unit 9 and the second circulating water pump 16 are opened.
Under the drive of the first circulating water pump 8, chilled water prepared by the water chilling unit 9 enters the water separator 7 through the first circulating water pump 8, the chilled water in the water separator 7 is divided into two parts, one part of the chilled water is divided into two parts through the third stop valve 13 and the water supply pipe connector 12 of the air conditioner tail end system to be absorbed in each air conditioner tail end system 2, so that cold is supplied to the building energy using unit 1, and the chilled water after absorbing the heat is collected into the water collector 6 through the water return pipe connector 3 of the air conditioner tail end system and the second stop valve 5; under the drive of the second circulating water pump 16, the other part of chilled water flows into a centralized cooling water supply pipe 18 through a fifth stop valve 17, the second circulating water pump 16, a check valve 15 and a centralized cooling water supply pipe connector 11, and meanwhile, the chilled water with the same flow rate, which absorbs heat and is heated, flows into the partitioned energy station A through a centralized cooling water return pipe 19 and enters the water collector 6 through a centralized cooling water return pipe connector 10 and a first stop valve 4; the chilled water in the water collector 6 flows back to the water chilling unit 9 again to be cooled.
And (3) cooling working conditions of the partitioned energy station B:
and (3) closing the second circulating water pump 16, opening the first stop valve 4, the second stop valve 5, the third stop valve 13, the fourth stop valve 14 and the fifth stop valve 17, and then opening the first circulating water pump 8 and the water chilling unit 9.
Under the drive of the first circulating water pump 8, the chilled water prepared by the water chilling unit 9 enters the water separator 7 through the first circulating water pump 8, meanwhile, the chilled water of the concentrated cooling water supply pipe 18 enters the water separator 7 through the concentrated cooling water supply pipe joint 11, the fourth stop valve 14 and the fifth stop valve 17, the chilled water in the water separator 7 is divided into all air-conditioning end systems 2 through a third stop valve 13 and a water supply pipe interface 12 of the air-conditioning end system to absorb heat, namely, the building energy unit 1 is cooled, the refrigerated water after absorbing heat is collected into the water collector 6 through the return pipe connector 3 of the air-conditioning tail end system and the second stop valve 5, the chilled water in the water collector 6 is divided into two parts, one part of chilled water flows back to the water chilling unit 9 again to be cooled, and the other part of chilled water flows into the concentrated cooling water return pipe 19 through the first stop valve 4 and the concentrated cooling water return pipe joint 10 and returns to the partitioned energy source station A again through the concentrated cooling water return pipe 19.
Wherein the check valve 15 ensures the flowing direction, and when the water flowing in the opposite direction can not pass through the check valve 15.
Wherein, TZZ-TZWWhen the number of the cooling days is less than or equal to 120, the time for putting each partitioned energy station into use is relatively uniform, and the total installed capacity V of the water chilling unit of the partitioned energy station of the nth building energy unitn＝Qmn×K；K＝Q/(Qm1+Qm2……+Qm(n-1)+Qmn) Or K is taken as a value between 0.5 and 0.8 according to the dispersion degree of the building modes served by all the building energy units in the building group;
because the earliest time of use and the latest time of use of the partitioned energy stations 20 in the building group do not exceed 120 cooling days, which means that the time of use of each partitioned energy station 20 in the building group is relatively uniform, an effective regional cooling mode can be formed in a short period, the chiller units 9 of each partitioned energy station 20 can be selected according to the simultaneous use coefficient of the building group, because the time-by-time cooling load change laws of the building energy units 1 in different building states are not consistent, the time of the peak value of the cooling load is also different, the peak value of the cooling load of the building group is smaller than the sum of the peak values of the cooling load of each building energy unit 1, that is, the simultaneous use coefficient of the building group is smaller, when regional cooling is adopted, the cooling loads of all the building energy units 1 in the building group can be considered at the same time, therefore, compared with the method that each building energy unit 1 performs chiller 9 selection according to its own maximum cooling load, the total chiller 9 installed capacity required for district cooling is smaller. At this time, through the collaborative work of each partitioned energy station 20, the cold load demand of each building energy unit 1 can be satisfied by using the chilled water by itself or redistributing the chilled water.
TZZ-TZWWhen the number of the cooling days is more than 120, the time for putting each partitioned energy station into use is considered to be relatively dispersed, and the total installed capacity V of the water chilling unit of the partitioned energy station of the nth building energy unitn＝Qmn×Kn；
Kn＝Qn/QmnOr according to the degree of dispersion of the building states serviced by the building energy units, KnBetween 0.7 and 0.9;
because the earliest and latest input and use time of the partitioned energy stations 20 exceeds 120 cooling days, which indicates that the input and use time of each partitioned energy station 20 in the building group is relatively dispersed, an effective regional cooling mode cannot be formed in a short time, and each partitioned energy station 20 must meet the cooling load requirement of the corresponding building energy unit 1 first, the installed capacity of the water chilling unit 9 of each partitioned energy station 20 should be selected according to the simultaneous use coefficient of the building energy unit 1.
TZZThe building energy units in the building group are put into use for the earliest time;
TZWthe latest input service time of the building energy units in the building group is obtained;
n is the number of building energy units in the building group;
q is the cooling capacity consumed by the air-conditioning end systems of all the building energy utilization units in the building group in the unit time during the cooling peak time of the building group;
Qnthe air-conditioning end system of the nth building energy unit is arranged at the building energy unitThe cold energy consumed in unit time at the cold supply peak time;
Vnthe total installed capacity of a water chilling unit of a partitioned energy station of the nth building energy consumption unit;
Qmnthe maximum cooling load of the nth building energy unit;
k is a simultaneous use coefficient of the building group;
Knthe coefficient is used for the nth building energy unit at the same time.
Claims (4)
1. A zoned energy station for district cooling, comprising: the system comprises an air conditioner tail end system water return pipe interface (3), a first stop valve (4), a second stop valve (5), a water collector (6), a water distributor (7), a first circulating water pump (8), a water chilling unit (9), a concentrated cold supply water return pipe interface (10), a concentrated cold supply water supply pipe interface (11), an air conditioner tail end system water supply pipe interface (12), a third stop valve (13), a fourth stop valve (14), a stop valve (15), a second circulating water pump (16) and a fifth stop valve (17);
the chilled water outlet of the water chilling unit (9) is connected with a first circulating water pump (8), the first circulating water pump (8) is connected with the water inlet of a water distributor (7), the water outlet of the water distributor (7) is connected with a third stop valve (13), the third stop valve (13) is connected with a water supply pipe connector (12) of an air-conditioning end system, the water distributor (7) is further connected with a fifth stop valve (17), the fifth stop valve (17) is connected with a fourth stop valve (14) and the water inlet of a second circulating water pump (16), the water outlet of the second circulating water pump (16) is connected with the water inlet of a check valve (15), and the water outlets of the fourth stop valve (14) and the check valve (15) are further connected with a centralized cooling water supply pipe connector (11);
a return water pipe connector (3) of the air conditioner tail end system is connected with a second stop valve (5), the second stop valve (5) is connected with a water inlet of a water collector (6), a water outlet of the water collector (6) is connected with a chilled water return port of a water chilling unit (9), the water collector (6) is also connected with a first stop valve (4), and the first stop valve (4) is connected with a concentrated cold supply return water pipe connector (10);
the system is provided with a plurality of air conditioner tail end system water return pipe interfaces (3) and a plurality of air conditioner tail end system water supply pipe interfaces (12), the number of the air conditioner tail end system water return pipe interfaces (3) is consistent with that of the air conditioner tail end system water supply pipe interfaces (12), the air conditioner tail end system water return pipe interfaces (3) and the air conditioner tail end system water supply pipe interfaces (12) are used for being connected with an air conditioner tail end system (2) of an energy unit (1) for a building, and a closed chilled water circulation pipeline can be formed between the air conditioner tail end system (2) and a water chilling unit (9);
the concentrated cold supply return water pipe joint (10) and the concentrated cold supply water pipe joint (11) are respectively used for connecting a concentrated cold supply return water pipe (19) and a concentrated cold supply water pipe (18).
2. A zoned energy station for district cooling as claimed in claim 1, wherein: the port of the first stop valve (4) connected with the water collector (6) has the functions of a water inlet and a water outlet, and is converted according to the use requirement; the port of the fifth stop valve (17) connected with the water separator (7) has the functions of a water inlet and a water outlet, and is converted according to the use requirement;
when the port of the first stop valve (4) connected with the water collector (6) is a water inlet, the port of the fifth stop valve (17) connected with the water distributor (7) is a water outlet; when the port of the first stop valve (4) connected with the water collector (6) is a water outlet, the port of the fifth stop valve (17) connected with the water distributor (7) is a water inlet;
the flow of chilled water passing through the first stop valve (4) is the same as that of chilled water passing through the fifth stop valve (17), and the flow of chilled water passing through the return water pipe joint (3) of the air-conditioning tail end system is the same as that of chilled water passing through the feed water pipe joint (12) of the air-conditioning tail end system.
3. A zoned energy station for district cooling as claimed in claim 1, wherein: the water chilling unit (9) is a screw type water chilling unit, a centrifugal type water chilling unit or an absorption type water chilling unit, and the water chilling unit (9) is used singly or in combination.
4. A zoned energy station for district cooling as claimed in claim 1, wherein: the partitioned energy source stations (20) are suitable for supplying cold to a building group in an area, the building group comprises a plurality of building energy units (1), each building energy unit (1) is provided with one partitioned energy source station (20), and the partitioned energy source stations (20) are connected with a concentrated cold supply water return pipe (19) and a concentrated cold supply water supply pipe (18) together to realize chilled water interconnection;
TZZ-TZWwhen the number of cooling days is less than or equal to 120, the time for putting each partitioned energy source station (20) into use is relatively uniform, and the total installed capacity V of the water chilling unit (9) of the partitioned energy source station (20) of the nth building energy unit (1)n＝Qmn×K；
K＝Q/(Qm1+Qm2……+Qm(n-1)+Qmn) Or K is selected from 0.5 to 0.8 according to the dispersion degree of the building modes served by all the building energy units (1) in the building group;
TZZ-TZWwhen the number of the cooling days is more than 120, the time for putting each partitioned energy station (20) into use is considered to be relatively dispersed, and the total installed capacity V of the water chilling unit (9) of the partitioned energy station (20) of the nth building energy unit (1)n＝Qmn×Kn；
Kn＝Qn/QmnOr according to the degree of dispersion of the building state served by the building energy unit (1), KnBetween 0.7 and 0.9;
TZZthe building energy unit (1) in the building group is put into use for the earliest time;
TZWthe latest input service time of the building energy units (1) in the building group is obtained;
n is the number of the building energy units (1) in the building group;
q is the cooling capacity consumed by the air-conditioning end system (2) of all the building energy utilization units (1) in the building group in the unit time during the cooling peak period of the building group;
Qnthe cold energy consumed by the air-conditioning tail end system (2) of the nth building energy unit (1) in unit time during the cold supply peak time of the building energy unit (1);
Vnassembly of a water chilling unit (9) of a partitioned energy station (20) for an nth building energy unit (1)Machine capacity;
Qmnthe maximum cold load of the nth building energy unit (1);
k is a simultaneous use coefficient of the building group;
Knthe coefficient is used for the nth building energy unit (1) at the same time.
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