CN102109263A - Cooling system - Google Patents
Cooling system Download PDFInfo
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- CN102109263A CN102109263A CN2009102472735A CN200910247273A CN102109263A CN 102109263 A CN102109263 A CN 102109263A CN 2009102472735 A CN2009102472735 A CN 2009102472735A CN 200910247273 A CN200910247273 A CN 200910247273A CN 102109263 A CN102109263 A CN 102109263A
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Abstract
The invention provides a cooling system which comprises a cooling water pump (1), a special filter (2), an original filter (3), a cooling tower (4),a condenser (5), an evaporator (6), a cold load (7), a refrigeration water pump (8), a three-way valve (9) and valves (A), (B), (C), (D), (E), (F), (G) and (H), wherein the cooling water pump (1), the special filter (2), the original filter (3) and the cooling tower (4) are sequentially connected; the condenser (5), the evaporator (6) and the cold load (7) are arranged in parallel to the cooling water pump (1), the special filter (2), the original filter (3) and the cooling tower (4) respectively; the left and right ends of the condenser (8) are connected with the valves (A) and (B) respectively; the left and right ends of the evaporator (6) are connected with the valves (C) and (D) respectively; one end of the cold load (7) is connected with the three-way valve (9) and connected with the cooling water pump (1) through the valve (G); the other end of the cold load (7) is connected to the cooling tower (4) through the valve (H); and the left and right ends of the refrigeration water pump (8) are connected with the valves (E) and (F) respectively. The cooling system provided by the invention has relatively high practical value.
Description
Technical field
The present invention relates to refrigeration plant, be specifically related to a kind of cooling system.
Background technology
In production or people's life, refrigeration plant has become indispensable equipment.There are some defectives in existing refrigeration plant, and is big as energy consumption, greenhouse gas emission etc.Along with environmental protection and energy-conservation etc. needs, how to improve existing cooling system, it is an important difficult problem that faces, for example, with the cold supply system in the cooling tower, utilize the nature refrigerant to substitute the refrigeration machine cooling, can solve the cooling needs of winter and some air-conditioning system of transition season, reduce the refrigerator operation time, cause to obtain remarkable energy saving effect.In addition, the supply water temperature in the cooling tower also has considerable influence to refrigeration.Therefore both environmental protection of research and design, energy-conservation again cooling system are problems anxious to be solved.
Summary of the invention
Technical problem to be solved by this invention is to overcome above-mentioned weak point, and research and design is environmental protection both, and energy-conservation again cooling system especially utilizes the nature refrigerant to substitute the cooling system of refrigeration machine cooling.
The invention provides a kind of cooling system.
Cooling system of the present invention comprises cooling water pump, private filter, former filter, cooling tower, condenser, evaporimeter, refrigeration duty, chilled water pump, triple valve and A, B, C, D, E, F, G, a H8 valve.Cooling water pump, private filter, former filter are connected successively with cooling tower; Parallel with it condenser, evaporimeter, refrigeration duty are set respectively; The two ends, the left and right sides of condenser connect A, B valve respectively; The two ends, the left and right sides of evaporimeter connect C, D valve respectively; One end of refrigeration duty connects triple valve, is connected with cooling water pump by the G valve again, and the other end of refrigeration duty returns the cooling tower circulation by the H valve, and the two ends, the left and right sides of chilled water pump connect E, F valve respectively, close E, F valve when utilizing the cooling tower cooling.
The inventor analyzes the control of the selection of the form of cooling tower cooling, supply water temperature, cold water temperature and cooling water pump etc. and selects:
1, the selection of cooling form
Generally, the cooling tower cooling roughly has three kinds of forms, 1) open cooling tower adds filter, 2) open cooling tower heat exchanger, 3) sealed cooling tower.The form that the inventor has selected first kind of open cooling tower to add the direct cooling water of filter is improved.In summer, the work of this system is consistent with the operation of conventional air-conditioning, and has arrived transition season, when environment temperature is enough low, will directly enters chilled water system from the next cooling water of cooling tower and circulate.Comprise in the terminal adjusting device that enters air-conditioning system, as fan coil, surface cooler etc.Above-mentioned three kinds of cooling towers relatively, and are best with the effect of this form energy conservation, but because open direct cold supply system is connected with chilled water system, make dirtier cooling water can pollute chilled water system, very easily stop up the terminal aircondition in the chilled water system.For reducing cooling water to line clogging and corrosion, the present invention installs impurity all in the private filter system again in former filter back will fundamentally eliminate valve and heat exchanger possibility of jamming through filter.Described private filter is exactly to add one deck 50 order stainless (steel) wires on the filter screen of the straight-through basket filter of YG07.
In addition, the characteristics that should combine with cooling water system at chilled water, carry out water treatment, the burn into fouling of system and the breeding of bacterium algae are consequently produced the factor of foundry loam and blocking pipe or setting to reduce because of the direct cooling water of open cooling tower causes.
2, the selection of supply water temperature
The selection of supply water temperature is specifically related to switching temperature.Switching temperature is meant the atmospheric moisture bulb temperature when the mechanical refrigeration of routine switches to the cooling tower cooling.Switching temperature and supply water temperature are in close relations: supply water temperature is high more, and its corresponding switching temperature is also high more, can utilize the time of cooling tower cooling just long more.Therefore, supply water temperature has determined switching temperature.Also having a factor in addition is the cold width of cloth, just the difference of cooling tower supply water temperature and atmospheric moisture bulb temperature.Switching temperature is that the difference according to the supply water temperature and the cold width of cloth obtains.General, the cold width of cloth of cooling tower is 3～5 ℃.For example, determine that as calculated this moment, the air conditioning terminal water temperature that need supply water was 13 ℃, consider the cold amplitude of cooling tower, heat loss such as pipeline and heat exchanger, make water temperature rise 4.5 ℃, in the time of then can obtaining outdoor wet-bulb temperature and be equal to or less than 8.5 ℃, can switch to cooling tower cooling pattern.Actual arrival along with winter and transition season, outside air temperature descends gradually, relative humidity reduces, and outdoor wet-bulb temperature is also descending, thus cooling tower outlet water temperature also decreases.And this moment, indoor humidity load and refrigeration duty are also in continuous decline, and air conditioning terminal can need moisture removal to reduce, and suitably improves freezing temperature, reduces the requirement that its dehumidifying effect can satisfy air-conditioning system fully.Show that as the AHU of the BA system data of air-conditioning system temperature control in the winter time and transition season, when freezing temperature reached 15 ℃, indoor humidity, temperature can both meet the requirement of production.Therefore, selecting the cooling coolant-temperature gage is 10 ℃-20 ℃, preferred 12 ℃-18 ℃.And be 4.5 ℃ of calculating according to the above cold width of cloth, then can get when outdoor wet-bulb temperature is equal to or less than 10.5 ℃ and can switch to cooling tower cooling pattern.Is if outdoor relative humidity is 65%, checking and answering surface drying ball humidity approximately about 13 ℃, according to Shanghai City, China temperature on average statistics http://www.chinastartour.com/CnNewsDetail.asp in recent years? id=171﹠amp; Classid=11 (as shown in table 1).From table, November to December can be found out, the pattern of cooling tower cooling can both be utilized January to March.So just prolonged the time of free cold supply greatly.(8.5 ℃ of wet-bulb temperature, relative humidity 65%, about 10.2 ℃ of dry-bulb temperatures)
| Month | January | February | March | April | May | June | July | August | September | October | November | December | Annual |
| Temperature on average | 3.6 | 4.7 | 8.4 | 14.1 | 19.0 | 23.4 | 27.8 | 27.7 | 23.6 | 18.2 | 12.4 | 6.2 | 15.8 |
| Average maximum air temperature | 7.7 | 8.7 | 12.6 | 18.6 | 23.4 | 27.3 | 31.8 | 31.5 | 27.3 | 22.4 | 16.8 | 10.7 | 19.9 |
| Mean minimum temperature | 0.5 | 1.6 | 5.1 | 10.5 | 15.5 | 20.3 | 24.8 | 24.7 | 20.5 | 14.5 | 8.7 | 2.5 | 12.4 |
Table 1. Shanghai each monthly mean temperature statistical form over the years (unit: ℃)
Improving supply water temperature is a kind of method that prolongs the cooling time, and another kind of method makes full use of the cold width of cloth exactly, when the cooling tower cooling, will be used as standby cooling tower when summer.The cooling tower that the present invention uses is two 600T square counterflow cooling towers that good opportunity cooling tower company produces, and only use one summer, and another is standby, when needs cooling tower cooling, uses simultaneously.This has also increased the time of free cold supply.
3, the control of cold water temperature
During the operation of cooling tower cold supply system, the supply water temperature of employing improves as far as possible, and the Cold water supply system that can satisfy the demand, and increases the cooling time of cooling tower, in order to realize maximum energy-saving effect, just need control the cold water water temperature.
The present invention uses triple valve 9 control cooling coils, and feeds back a position signalling and give control system.Whether control system is made regular check on all valves by a simple control method and is all opened, if all valves are all opened just can the raise adjusting temperature of a unit step-length of the design temperature of cold water.As 0.25 ℃, (concrete time determine) open degree of check valve once more after a period of time by the reaction time of system, if still all do not open, the setting value of the cold water temperature step-length that just raises again so.On the contrary, all open, so design temperature is reduced a step-length if control system detects all valves of system.This control method is often used in refrigeration system, because of can increasing the cooling time of cooling tower, thereby makes energy-saving effect more remarkable, and this just seems particularly important for the cooling tower cooling.
4, the selection of cooling water pump
Because directly cold supply system adopts a cover pump working, generally, because the resistance of evaporation circuit is less than the resistance in condensation loop, and chilled water pump often is used to do the unsteady flow amount and supplies with, control system is also very complicated, the flow that cooling tower can occur is lower than the situation of minimum discharge, therefore, selects cooling water pump rather than the chilled water pump water pump as direct cold supply system.
1) metered flow of cooling water pump is greater than system requirements, but its specified Yang Cheng is lower than system requirements.Cooling water pump will reduce flow and improve Yang Cheng.Only need in this case to check whether flow satisfies the minimum flow requirement of cooling tower.2) metered flow of cooling water pump is less than system requirements, but its specified Yang Cheng is than system requirements height.Cooling water pump will reduce Yang Cheng, augmented flow.When changes in flow rate was big, whether the increase of power of motor was within allowed band in the time of must checking big flow, otherwise water pump will transship and burn, and will determine also simultaneously whether cooling tower can bear the flow that is increased.
The water pump that the present invention uses is the 200S-12A double suction centrifugal pump that east pump industry factory produces.The metered flow of chilled water pump is 270m
2/ h, lift are 36m, and power is 37kw.The cooling water pump metered flow is 280m
3/ h, lift are 42m, and power is 45kw.The rated head of cooling water pump, flow, power is all greater than the rated capacity of chilled water pump, selects for use the direct cooling of cooling water pump can reach the requirement of system fully, also solved because of installing the deficiency of the resistance institute loss lift that a private filter brings additional.
In addition, former filter, cooling tower, condenser, evaporimeter, refrigeration duty, chilled water pump and the triple valve of the present invention's use; And A, B, C, D, E, F, a G and H8 valve is the cooling system conventional equipment, obtains the private filter self-control from commercially available.
The present invention has following effect:
1, effect is good, and cost is low, and is scientific and reasonable.
2, farthest utilize the circulation low-temperature receiver.
3, the reasonable control of cooling tower cold water temperature can increase the cooling time of system.
Description of drawings
The schematic diagram of a kind of cooling system of Fig. 1 the present invention
The specific embodiment
Embodiment 1:
As shown in Figure 1, cooling system of the present invention comprises cooling water pump 1, private filter 2, former filter 3, cooling tower 4, condenser 5, evaporimeter 6, refrigeration duty 7, chilled water pump 8, triple valve 9 and A, B, C, D, E, F, a G and H8 valve.Cooling water pump 1, private filter 2, former filter 3 and cooling tower 4 are connected successively; Parallel with it condenser 5, evaporimeter 6, refrigeration duty 7 are set respectively; The two ends, the left and right sides of condenser 5 connect A, B valve respectively; The two ends, the left and right sides of evaporimeter 6 connect C, D valve respectively; One end of refrigeration duty 7 connects triple valve 9, is connected with cooling water pump 1 by the G valve again, and the other end of refrigeration duty 7 returns cooling tower 4 circulations by the H valve; The two ends, the left and right sides of chilled water pump 8 connect E, F valve respectively, close E, F valve when utilizing the cooling tower cooling.
When using, at first close A, B, C, E, the F valve is opened G, H valve and triple valve 9 (placing two logical positions) then.Open cooling water pump 1, cooling water returns cooling tower 4 circulations by former filter 3, private filter 2, cooling water pump 1, G valve, triple valve 9 and refrigeration duty 7 through the H valve successively from cooling tower 4, closes A, B, C, E, F valve.Condenser 5, evaporimeter 6 chilled water pumps 8 use when kind of refrigeration cycle, are in closed condition when using the cooling tower cooling.
The metered flow of cooling water pump (1) is 280m
2/ h, lift are 42m, and power is 45kw
Utilize the effect of cooling tower cooling:
In November, the 2008 refrigerator operation work according to the present invention, electric current on average per hour is 230 amperes, and 45 kilowatts of cooling water pumps are added in about 115 kilowatts of worthwhile electricity consumptions, and 37 kilowatts of chilled water pumps amount to per hour about 197 kilowatts.
Utilize cooling tower to replace the refrigeration machine cooling to need only with about 45 kilowatts of cooling water pumps, therefore original power consumption deducts 45 kilowatts for 197 kilowatts, but 152 kilowatts of using electricity wisely per hour, can save 95.76 yuan by now average 0.63 yuan of calculating of electricity rates, calculated by 22 days 8 hours in every month and can save 26752 kilowatts, add up to 16853.76 yuan.
Embodiment 2:
Using method is with embodiment 1
Utilize the effect of cooling tower cooling:
In December, 2008, the refrigerator operation operating current on average per hour was 200 amperes according to the present invention, and 45 kilowatts of cooling water pumps are added in about 100 kilowatts of worthwhile electricity consumptions, and 37 kilowatts of chilled water pumps amount to per hour about 182 kilowatts.
Utilize cooling tower to replace the refrigeration machine cooling to need only with about 45 kilowatts of cooling water pumps, therefore original power consumption deducts 45 kilowatts for 182 kilowatts, but 137 kilowatts of using electricity wisely per hour, can save 86.31 yuan by now average 0.63 yuan of calculating of electricity rates, this month, calculated by 22 days 8 hours and can save 24112 kilowatts, added up to 15190.56 yuan.
Embodiment 3:
Using method is with embodiment 1
Utilize the effect of cooling tower cooling:
In January, 2009, the refrigerator operation operating current on average per hour was 188 amperes according to the present invention, and 45 kilowatts of cooling water pumps are added in about 94 kilowatts of worthwhile electricity consumptions, and 37 kilowatts of chilled water pumps amount to per hour about 176 kilowatts.
Utilize cooling tower to replace the refrigeration machine cooling to need only with about 45 kilowatts of cooling water pumps, therefore original power consumption deducts 45 kilowatts for 176 kilowatts, but 131 kilowatts of using electricity wisely per hour, can save 82.53 yuan by now average 0.63 yuan of calculating of electricity rates, this month, calculated by 15 days 8 hours and can save 15720 kilowatts, added up to 9903.6 yuan.
Embodiment 4:
Using method is with embodiment 1
Utilize the effect of cooling tower cooling:
In February, 2009, the refrigerator operation operating current on average per hour was 188 amperes according to the present invention, and 45 kilowatts of cooling water pumps are added in about 94 kilowatts of worthwhile electricity consumptions, and 37 kilowatts of chilled water pumps amount to per hour about 176 kilowatts.
Utilize cooling tower to replace the refrigeration machine cooling to need only with about 45 kilowatts of cooling water pumps, therefore original power consumption deducts 45 kilowatts for 176 kilowatts, but 131 kilowatts of using electricity wisely per hour, can save 82.53 yuan by now average 0.63 yuan of calculating of electricity rates, this month, calculated by 20 days 8 hours and can save 20960 kilowatts, added up to 13204.8 yuan.
Embodiment 5:
Using method is with embodiment 1
Utilize the effect of cooling tower cooling:
In March, 2009, the refrigerator operation operating current on average per hour was 240 amperes according to the present invention, and 45 kilowatts of cooling water pumps are added in about 120 kilowatts of worthwhile electricity consumptions, and 37 kilowatts of chilled water pumps amount to per hour about 202 kilowatts.
Utilize cooling tower to replace the refrigeration machine cooling to need only with about 45 kilowatts of cooling water pumps, therefore original power consumption deducts 45 kilowatts for 202 kilowatts, but 157 kilowatts of using electricity wisely per hour, can save 98.91 yuan by now average 0.63 yuan of calculating of electricity rates, this month, calculated by 22 days 8 hours and can save 27632 kilowatts, added up to 17408.2 yuan.
Claims (5)
1. cooling system, it is characterized in that described cooling system comprise cooling water pump (1), private filter (2), former filter (3), cooling tower (4), condenser (5), evaporimeter (6), refrigeration duty (7), chilled water pump (8), triple valve (9) and (A), (B), (C), (D), (E), (F), (G) and (H) 8 valves; Cooling water pump (1), private filter (2), former filter (3) and cooling tower (4) are connected successively, parallel with it condenser (5), evaporimeter (6), refrigeration duty (7) are set respectively; The two ends, the left and right sides of condenser (8) connect (A), (B) valve respectively; The two ends, the left and right sides of evaporimeter (6) connect (C), (D) valve respectively; One end of refrigeration duty (7) connects triple valve (9), is connected with cooling water pump (1) by (G) valve again, and the other end of refrigeration duty (7) returns cooling tower (4) circulation by (H) valve; The two ends, the left and right sides of chilled water pump (8) connect (E), (F) valve respectively, close (E), (F) valve when utilizing the cooling tower cooling.
2. cooling system according to claim 1 is characterized in that described private filter (2) is to add one deck 50 order stainless (steel) wires on the filter screen of the straight-through basket filter of YG07.
3. cooling system according to claim 1, the metered flow that it is characterized in that described chilled water pump (8) is 270m
2/ h, lift are 36m, and power is 37kw; The metered flow of cooling water pump (1) is 280m
2/ h, lift are 42m, and power is 45kw.
4. cooling system according to claim 1 is characterized in that described cooling tower (4) supply water temperature is 10 ℃-20 ℃.
5. cooling system according to claim 4 is characterized in that described cooling tower (4) supply water temperature is 12 ℃-18 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102472735A CN102109263A (en) | 2009-12-28 | 2009-12-28 | Cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102472735A CN102109263A (en) | 2009-12-28 | 2009-12-28 | Cooling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102109263A true CN102109263A (en) | 2011-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102472735A Pending CN102109263A (en) | 2009-12-28 | 2009-12-28 | Cooling system |
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| CN (1) | CN102109263A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106081494A (en) * | 2016-08-12 | 2016-11-09 | 成都三可实业有限公司 | A kind of sugar-tablet coolconveyer |
| CN115183340A (en) * | 2022-06-22 | 2022-10-14 | 珠海格力电器股份有限公司 | Refrigerating system and control method thereof |
| CN116067196B (en) * | 2023-03-24 | 2023-07-14 | 中建西南咨询顾问有限公司 | Cooling tower cooling system and switching temperature calculating method thereof |
-
2009
- 2009-12-28 CN CN2009102472735A patent/CN102109263A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106081494A (en) * | 2016-08-12 | 2016-11-09 | 成都三可实业有限公司 | A kind of sugar-tablet coolconveyer |
| CN115183340A (en) * | 2022-06-22 | 2022-10-14 | 珠海格力电器股份有限公司 | Refrigerating system and control method thereof |
| CN116067196B (en) * | 2023-03-24 | 2023-07-14 | 中建西南咨询顾问有限公司 | Cooling tower cooling system and switching temperature calculating method thereof |
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Application publication date: 20110629 |