CN206055810U - A kind of United system of air-conditioning - Google Patents

A kind of United system of air-conditioning Download PDF

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Publication number
CN206055810U
CN206055810U CN201621099521.8U CN201621099521U CN206055810U CN 206055810 U CN206055810 U CN 206055810U CN 201621099521 U CN201621099521 U CN 201621099521U CN 206055810 U CN206055810 U CN 206055810U
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cooling
water
chilled
chilling units
heat exchanger
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CN201621099521.8U
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易学庆
马黎军
敖顺荣
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China Tobacco Anhui Industrial Co Ltd
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China Tobacco Anhui Industrial Co Ltd
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Abstract

The utility model discloses a kind of United system of air-conditioning, including handpiece Water Chilling Units, the condenser side of handpiece Water Chilling Units is provided with chilled(cooling) water return (CWR), the vaporizer side of handpiece Water Chilling Units is provided with chilled water circuit, room conditioning heat exchange coil is arranged on chilled water circuit, cooling tower is additionally provided with chilled(cooling) water return (CWR), United system also includes heat exchanger, the condenser side of heat exchanger primary side and handpiece Water Chilling Units be arranged in series and condenser side positioned at handpiece Water Chilling Units upstream, heat exchanger secondary side is arranged in series and positioned at the upstream of the vaporizer side of handpiece Water Chilling Units with the vaporizer side of handpiece Water Chilling Units.This utility model has advantages below compared to existing technology:The capacity usage ratio of cooling tower cooling is higher, for cool time is longer, energy-saving effect is more preferable.

Description

A kind of United system of air-conditioning
Technical field
This utility model is related to a kind of United system of air-conditioning.
Background technology
Cooling tower cold supply system (also known as free cold supply, Free Cooling) is a kind of building central air conditioner system refrigeration Stand energy-saving system form, it is adaptable to which air conditioning system for building still has cooling needs filtering season and winter, again cannot or It is not suitable for the occasion using fresh air low-temperature receiver.
Such as, for the modern office building using primary air fan-coil system, the inner region of building often requires that sky Adjusting system all-year-around cooling, and in transition season or winter, again cannot when outdoor air enthalpy designs enthalpy less than room air Free cold supply is carried out using resh air requirement is increased.Again such as, for annual interior refrigeration duty accounts for leading constant-temperatureconstant-humidity constant-humidity type industry Building (such as cigar mill), as during normal production, process equipment quantity of heat production is larger, winter and transition season workshop still may be used Raw cooling needs can be deposited, using the type of cooling for increasing resh air requirement, the increase of air wetting amount may be caused, and to phase in workshop Humid control precision is had a negative impact.
Therefore, using cooling by cooling tower, outdoor natural cooling source is utilized by water system, replaces refrigeration plant cooling-water machine The artificial cold source of group operation, can play good energy-saving effect.
According to the operation principle of cooling tower, the reason for water temperature can be reduced by cooling tower it is:When the water in tower and air connect When tactile, the direct heat transfer between air and water, i.e. Exchange of apparent heat are on the one hand produced;On the other hand due between water surface and air There is water vapor partial pressure differential, make the hydrone of water surface to air flow, produce Evaporation Phenomenon, take away the latent heat of vaporization, that is, dive Heat exchange.When cooling tower leaving water temperature and air's wet bulb temperature are close, i.e., cold width very little when, cooling drop of the water in cooling tower Temperature is exchanged mainly by latent heat during moisture evaporation, and the Exchange of apparent heat between water and air is negligible.
Cooling tower cold supply system is divided into two big class by whether cooling water is directly entered air conditioning terminal:Cooling tower supplying cold directly System and cooling tower indirect cooling system.Fig. 1 is typical cooling tower supplying cold directly system flow chart, and Fig. 2 is typical cooling Tower indirect cooling system flow chart.
Cooling tower supplying cold directly system is mainly characterized by:(1) system form is simpler, no intermediate heat transfer process, because This available cold water temperature under the conditions of identical outdoor weather is low compared with cooling tower indirect cooling system;(2) as cooling tower is opened The cooling water of formula system is easily polluted, and can cause system internal corrosion or fouling, so as to shorten be after into chilled water system System service life, affects the stability of system operation, therefore system to need using special water treatment facilities;(3) cooling tower is straight When connecing cold supply system operation, the resistance of whole air-conditioner water system, flow can occur large change, accordingly, it is possible to there is water pump Can be with pipe resistance, the unmatched phenomenon of cooling-tower circulating water amount.
Cooling tower indirect cooling system is mainly characterized by:(1) cooling water loop is exchanged by heat exchange with freezing water loops Device is mutually independent, it is ensured that the sanitary condition of chilled water pipeline;(2) it is because there is a heat transfer process, straight with cooling tower Connect cold supply system to compare, if reaching same cooling effect, it is desirable to which cooling water temperature is more lower, typically differ 1~2 DEG C;(3) Heat transmission equipment and corresponding ducts need to be increased, system form is relative complex;(4), in Air-conditioning Engineering conventional at present, it is guarantee Refrigeration system reliability of operation, more options cooling tower indirect cooling system.
The document that the power-saving technology and design of cooling tower (direct or indirect) cold supply system are numerous at home and abroad is provided Describe in material, be verified in the numerous at home and abroad engineering practice of its energy-saving effect.But, take a broad view of these documents and engineering Using, cooling tower (direct or indirect) cooling operational mode and chiller unit cooling operational mode by as independent of one another Two kinds of operational modes each use.During actual motion, change and air-conditioning end of two kinds of operational modes according to outdoor weather condition The refrigeration duty changes in demand of end system, switches over operation by season.
Such as, for a certain specific building central air conditioner system, when outdoor air wet bulb temperature is less than certain value, Cooling tower (or heat exchanger secondary side) leaving water temperature is less than the chilled water return water temperature demand of air conditioning terminal system, and now system is cut Cooling tower cooling operational mode is changed to, conversely, being switched to chiller unit cooling operational mode.
Additionally, cooling tower cold supply system usually have ignored the radiating of cooling tower when design and Practical Project run at present Impact of the load to leaving water temperature, especially in the refrigeration station system of multiple stage handpiece Water Chilling Units, water pump and cooling tower composition, designer Or the target that operator reduces water pump and cooling tower fan operation energy consumption sometimes for coveting, cooling tower cooling operational mode Often put into operation using the cooling tower and cooling water pump of less number of units, as a result cause cooling tower usually in high radiating load condition Lower operation.
According to thermal property research of the present inventor to cooling tower under cooling operational mode, when cooling tower runs, radiating is negative Lotus is lower, and under the conditions of identical air's wet bulb temperature, its leaving water temperature is lower, and cooling tower can be with the time of cooling in whole year Longer, energy-saving effect is also better.
Fig. 3 is thermal property curve chart of certain cooling tower under metered flow operating mode, when in the case of different cooling ranges. From figure 3, it can be seen that when outdoor wet bulb temperature is 26 DEG C (summer design conditions), requiring according to 5 DEG C of temperature drops, cooling tower Leaving water temperature can reach 28.5 DEG C (cold width is 2.5 DEG C), and inflow temperature is 33.5 DEG C.When outdoor wet bulb temperature reaches 5 DEG C, steam Send out heat transfer to reduce, if flow is constant and still 5 DEG C of coolings on request, cooling tower leaving water temperature up to 15 DEG C (cold width be 10 DEG C), Inflow temperature is 20 DEG C, and there were significant differences with summer cold water supply and return water temperature.Meanwhile, the above-mentioned 5 DEG C of same outdoor wet bulbs of correspondence Temperature, if flow is constant, but cooling tower, when only undertaking 2 DEG C of temperature drops (radiating load reduces 60%), cooling tower leaving water temperature can Up to 10 DEG C (cold width is 5 DEG C), inflow temperature is 12 DEG C.Therefore, when cooling tower runs, the decline of undertaken radiating load, can make cold But tower obtains lower leaving water temperature.
Fig. 4 is that thermal technology of the south China city cooling tower in compression electricity refrigeration system under different radiating loads is special Linearity curve figure.Figure 4, it is seen that either handpiece Water Chilling Units supply cold operation (Chiller On) pattern, or cooling tower to supply Cold operation (Chiller Off) pattern, under same air's wet bulb temperature, what cooling tower half capacity operation operating mode was obtained goes out Coolant-temperature gage is significantly lower than the leaving water temperature under oepration at full load operating mode.If air conditioning terminal system is in conditioning in Transition Season or the cooling in winter Demand temperature is 14 DEG C, and air's wet bulb temperature of the cooling tower needed under oepration at full load operating mode is 5 DEG C, and in half capacity operation Air's wet bulb temperature needed under operating mode is 10 DEG C, all-year-around cooling time phase of the cooling tower under two kinds of operating conditions in the city Differ from 1785 hours (equivalent 74.4 days).
Meanwhile, the present inventor enters for the refrigeration plant total energy consumption under cold operation to the cooling tower (water pump containing correspondence) of different number of units Row relative analyses, find:Ensure that the low leaving water temperature of cooling tower supplies cool time to obtain longer cooling tower, to the total of refrigeration plant Energy-saving effect far superior to reduces the energy-saving effect brought by cooling tower and cooling water pump operation number of units.
In a word, the cooling tower cold supply system for generally adopting in current engineering needs at aspects such as conceptual design, runing adjustments In further being improved.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, there is provided a kind of United system of air-conditioning.
This utility model is achieved through the following technical solutions:
A kind of United system of air-conditioning, including handpiece Water Chilling Units, the condenser side of the handpiece Water Chilling Units are provided with cold But water loop, the vaporizer side of the handpiece Water Chilling Units are provided with chilled water circuit, and room conditioning heat exchange coil is arranged on described On chilled water circuit, cooling tower on the chilled(cooling) water return (CWR), is additionally provided with, the United system also includes heat exchanger, described Heat exchanger primary side is arranged in series and positioned at the condenser side of the handpiece Water Chilling Units with the condenser side of the handpiece Water Chilling Units Upstream, the heat exchanger secondary side is arranged in series and positioned at the handpiece Water Chilling Units with the vaporizer side of the handpiece Water Chilling Units The upstream of vaporizer side;
In the chilled(cooling) water return (CWR), the cooling water inlet pipe road and cooling water outlet pipe road of the heat exchanger primary side pass through The bypass connection of first external bypass for fluid road, the cooling water inlet pipe road of the condenser side of the handpiece Water Chilling Units and cooling water water outlet Pipeline by the second external bypass for fluid road bypass connection, on the cooling water outlet pipe road of the cooling tower, the heat exchanger once On the cooling water inlet pipe road and cooling water outlet pipe road of side, the cooling water inlet pipe road of the condenser side of the handpiece Water Chilling Units Be separately provided on cooling water outlet pipe road detect cooling water temperature cooling-water temperature sensor,
In the chilled water circuit, the chilled water inlet channel and chilled water outlet conduit of the heat exchanger secondary side pass through The bypass connection of 3rd external bypass for fluid road, on the chilled water inlet channel and chilled water outlet conduit of the heat exchanger secondary side, Detection freezing is separately provided on the chilled water inlet channel and chilled water outlet conduit of the room conditioning heat exchange coil The chilled water temperature sensor of coolant-temperature gage.
The first external bypass for fluid road, the second external bypass for fluid road, the 3rd external bypass for fluid road, the heat exchanger are once On the cooling water outlet pipe road of side, on the cooling water inlet pipe road of the condenser side of the handpiece Water Chilling Units, the heat exchanger two Flow control valve is respectively equipped with the chilled water outlet conduit of secondary side.
The chilled(cooling) water return (CWR) is provided with cooling water pump, and the cooling water pump is located at the cooling tower and the heat exchanger one Between secondary side.
The chilled water circuit is provided with chilled water pump, and the chilled water pump is located at the room conditioning heat exchange coil and institute State between heat exchanger secondary side.
The cooling water inlet pipe road of the cooling tower is provided with flow control valve.
This utility model has advantages below compared to existing technology:
A kind of United system of air-conditioning that this utility model is provided, which arranges plate type heat exchanger and handpiece Water Chilling Units string Connection, the cooling water out Jing after cooling tower cooler, may be selected independent Jing heat exchangers or individually through handpiece Water Chilling Units or according to It is secondary select to sequentially pass through heat exchanger and handpiece Water Chilling Units in transition season through heat exchanger and handpiece Water Chilling Units, with cooling tower out Cooling water Jing heat exchangers first carry out pre-cooling to the chilled water backwater from air-conditioning out, and the chilled water after pre-cooling is again through handpiece Water Chilling Units Freezed, reduce the main frame energy consumption of handpiece Water Chilling Units, obtain the considerable part natural cooling time, only additionally increased water in heat exchange Conveying energy consumption in device, the capacity usage ratio with cooling tower cooling is higher, for cool time is longer, energy-saving effect is preferably excellent Point.
Description of the drawings
Fig. 1 is typical cooling tower supplying cold directly system flow chart in prior art
Fig. 2 is typical cooling tower indirect cooling system flow chart in prior art
Fig. 3 is thermal characteristics curve chart of the cooling tower under different cooling range operating modes under metered flow in prior art
Fig. 4 be in prior art under different load the cooling tower leaving water temperature of compression-type refrigerating system and wet bulb temperature Corresponding relation figure
Structural representations of the Fig. 5 for the United system of the present embodiment.
Label in figure:1 handpiece Water Chilling Units, 2 chilled(cooling) water return (CWR)s, 3 chilled water circuits, 4 cooling towers, 5 heat exchangers, outside 6 first By-pass line, 7 second external bypass for fluid roads, 8 the 3rd external bypass for fluid roads, 9 cooling-water temperature sensors, 10 chilled water temperatures are passed Sensor, 11 flow control valves, 12 cooling water pumps, 13 chilled water pumps.
Specific embodiment
Below embodiment of the present utility model is elaborated, the present embodiment is with technical solutions of the utility model as front Put and implemented, give detailed embodiment and specific operating process, but protection domain of the present utility model is not limited In following embodiments.
Referring to Fig. 5, present embodiment discloses a kind of United system of air-conditioning, including handpiece Water Chilling Units 1, handpiece Water Chilling Units 1 Including condenser, compressor and vaporizer, the condenser side of handpiece Water Chilling Units 1 is provided with chilled(cooling) water return (CWR) 2, handpiece Water Chilling Units 1 Vaporizer side is provided with chilled water circuit 3, and room conditioning heat exchange coil is arranged on chilled water circuit 3, on chilled(cooling) water return (CWR) 2 Cooling tower 4 is additionally provided with, United system also includes the condenser one of heat exchanger 5,5 primary side of heat exchanger and handpiece Water Chilling Units 1 Side be arranged in series and condenser side positioned at handpiece Water Chilling Units 1 upstream, the vaporizer of 5 secondary side of heat exchanger and handpiece Water Chilling Units 1 Side is arranged in series and positioned at the upstream of the vaporizer side of handpiece Water Chilling Units 1;
In chilled(cooling) water return (CWR) 2, the cooling water inlet pipe road and cooling water outlet pipe road of 5 primary side of heat exchanger pass through outside first Radical thread a pipe 6 bypass connection, the cooling water inlet pipe road and cooling water outlet pipe road of the condenser side of handpiece Water Chilling Units 1 pass through The bypass connection of second external bypass for fluid road 7, on the cooling water outlet pipe road of cooling tower 4, the water inlet of the cooling water of 5 primary side of heat exchanger On pipeline and cooling water outlet pipe road, the cooling water inlet pipe road of the condenser side of handpiece Water Chilling Units 1 and cooling water outlet pipe road On be separately provided for detect cooling water temperature cooling-water temperature sensor 9,
In chilled water circuit 3, the chilled water inlet channel and chilled water outlet conduit of 5 secondary side of heat exchanger pass through outside the 3rd Radical is threaded a pipe the connection of 8 bypass, on the chilled water inlet channel and chilled water outlet conduit of 5 secondary side of heat exchanger, room conditioning It is separately provided for detecting the freezing of chilled water temperature on the chilled water inlet channel and chilled water outlet conduit of heat exchange coil Water temperature sensor 10.
Wherein, the first external bypass for fluid road 6, the second external bypass for fluid road 7, the 3rd external bypass for fluid road 8, heat exchanger 5 one On the cooling water outlet pipe road of secondary side, on the cooling water inlet pipe road of the condenser side of handpiece Water Chilling Units 1,5 secondary side of heat exchanger Chilled water outlet conduit on, be respectively equipped with flow control valve 11 on the cooling water inlet pipe road of cooling tower 4, for adjusting each Discharge in pipeline.
Chilled(cooling) water return (CWR) 2 is provided with cooling water pump 12, and cooling water pump 12 is located between 5 primary side of cooling tower 4 and heat exchanger. Chilled water circuit 3 is provided with chilled water pump 13, chilled water pump 13 be located at room conditioning heat exchange coil and 5 secondary side of heat exchanger it Between.
Heat exchanger 5 can be plate type heat exchanger 5, or other kinds of heat exchanger 5, and its heat exchange amount is by empty for cold season End refrigeration duty demand is adjusted to be designed, typical case is refrigeration plant general assembly for the 30% or so of cold.5 primary side of heat exchanger with Condenser, 5 secondary side of heat exchanger and vaporizer should carry out matched design in terms of resistance, flow.
The selectable modes of this United system have:
Pattern one, 1 independent cooling mode of handpiece Water Chilling Units:The cooling water of cooling tower 4 is provided independently to handpiece Water Chilling Units 1, with reality 1 independent cooling mode of existing handpiece Water Chilling Units;
The cooling mode of pattern two, 1 air conditioning of cooling tower 4 and handpiece Water Chilling Units:The cooling water of cooling tower 4 is sequentially passed through and is changed The series connection of hot device 5 and handpiece Water Chilling Units 1, i.e. cooling water is through 5 primary side of heat exchanger and the condenser side of handpiece Water Chilling Units 1, conditioning in Transition Season The cooling water water outlet for saving cooling tower 4 first passes through 5 pre-cooling of heat exchanger chilled water backwater from air-conditioning out, the chilled water after pre-cooling Enter back into handpiece Water Chilling Units 1 to freeze, to reduce the energy consumption of handpiece Water Chilling Units 1, so as to realize 1 air conditioning of cooling tower 4 and handpiece Water Chilling Units Cooling mode;
The independent cooling mode of pattern three, cooling tower 4:The cooling water of cooling tower 4 is provided independently to heat exchanger 5, to realize The independent cooling mode of cooling tower 4.
Above pattern need to only pass through temperature of the control device according to each temperature sensor detection, control each Flow-rate adjustment The size of valve 11 come realize switching.
Preferred embodiment of the present utility model is these are only, it is not to limit this utility model, all in this practicality Any modification, equivalent and improvement for being made within new spirit and principle etc., should be included in guarantor of the present utility model Within the scope of shield.

Claims (5)

1. a kind of United system of air-conditioning, including handpiece Water Chilling Units, the condenser side of the handpiece Water Chilling Units are provided with cooling Water loop, the vaporizer side of the handpiece Water Chilling Units are provided with chilled water circuit, and room conditioning heat exchange coil is arranged on described cold Freeze in water loop, on the chilled(cooling) water return (CWR), be additionally provided with cooling tower, it is characterised in that:The United system also includes changing Hot device, the heat exchanger primary side are arranged in series and positioned at the cold of the handpiece Water Chilling Units with the condenser side of the handpiece Water Chilling Units The upstream of condenser side, the heat exchanger secondary side are arranged in series with the vaporizer side of the handpiece Water Chilling Units and are located at described cold The upstream of the vaporizer side of water dispenser group;
In the chilled(cooling) water return (CWR), the cooling water inlet pipe road and cooling water outlet pipe road of the heat exchanger primary side pass through first The bypass connection of external bypass for fluid road, the cooling water inlet pipe road and cooling water outlet pipe road of the condenser side of the handpiece Water Chilling Units Connected by the second external bypass for fluid road bypass, on the cooling water outlet pipe road of the cooling tower, the heat exchanger primary side On cooling water inlet pipe road and cooling water outlet pipe road, the cooling water inlet pipe road of the condenser side of the handpiece Water Chilling Units and cold But it is separately provided for detecting the cooling-water temperature sensor of cooling water temperature on water outlet conduit,
In the chilled water circuit, the chilled water inlet channel and chilled water outlet conduit of the heat exchanger secondary side pass through the 3rd External bypass for fluid road bypass connection, on the chilled water inlet channel and chilled water outlet conduit of the heat exchanger secondary side, described It is separately provided for detecting freezing temperature on the chilled water inlet channel and chilled water outlet conduit of room conditioning heat exchange coil The chilled water temperature sensor of degree.
2. a kind of United system of air-conditioning as claimed in claim 1, it is characterised in that:First external bypass for fluid On road, the second external bypass for fluid road, the 3rd external bypass for fluid road, the cooling water outlet pipe road of the heat exchanger primary side, it is described On the cooling water inlet pipe road of the condenser side of handpiece Water Chilling Units, on the chilled water outlet conduit of the heat exchanger secondary side respectively It is provided with flow control valve.
3. a kind of United system of air-conditioning as claimed in claim 1, it is characterised in that:The chilled(cooling) water return (CWR) is provided with Cooling water pump, the cooling water pump are located between the cooling tower and the heat exchanger primary side.
4. a kind of United system of air-conditioning as claimed in claim 1, it is characterised in that:The chilled water circuit is provided with Chilled water pump, the chilled water pump are located between the room conditioning heat exchange coil and the heat exchanger secondary side.
5. a kind of United system of air-conditioning as claimed in claim 1, it is characterised in that:The cooling water of the cooling tower enters Waterpipe is provided with flow control valve.
CN201621099521.8U 2016-09-30 2016-09-30 A kind of United system of air-conditioning Active CN206055810U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107166586A (en) * 2017-05-26 2017-09-15 郑州云海信息技术有限公司 A kind of data center's energy-saving air conditioning system and adjusting method
CN107166582A (en) * 2017-05-11 2017-09-15 珠海格力电器股份有限公司 Air conditioning cooling water system, air-conditioning system and air conditioning cooling water system control method
CN107255329A (en) * 2017-07-12 2017-10-17 东南大学 A kind of transition season low power consuming cold supply system based on energy tower
CN107940635A (en) * 2017-10-27 2018-04-20 河南中烟工业有限责任公司 A kind of energy-saving air conditioning system of tobacco workshop
CN110595013A (en) * 2019-10-23 2019-12-20 李立华 Air conditioner refrigeration method and system for data center and data center
CN110940014A (en) * 2019-12-19 2020-03-31 珠海格力电器股份有限公司 Energy-saving air conditioner water system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107166582A (en) * 2017-05-11 2017-09-15 珠海格力电器股份有限公司 Air conditioning cooling water system, air-conditioning system and air conditioning cooling water system control method
CN107166582B (en) * 2017-05-11 2019-05-24 珠海格力电器股份有限公司 Air conditioning cooling water system, air-conditioning system and air conditioning cooling water system control method
CN107166586A (en) * 2017-05-26 2017-09-15 郑州云海信息技术有限公司 A kind of data center's energy-saving air conditioning system and adjusting method
CN107255329A (en) * 2017-07-12 2017-10-17 东南大学 A kind of transition season low power consuming cold supply system based on energy tower
CN107940635A (en) * 2017-10-27 2018-04-20 河南中烟工业有限责任公司 A kind of energy-saving air conditioning system of tobacco workshop
CN110595013A (en) * 2019-10-23 2019-12-20 李立华 Air conditioner refrigeration method and system for data center and data center
CN110940014A (en) * 2019-12-19 2020-03-31 珠海格力电器股份有限公司 Energy-saving air conditioner water system

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