CN201110605Y - Water chilling unit with natural cooling technology - Google Patents
Water chilling unit with natural cooling technology Download PDFInfo
- Publication number
- CN201110605Y CN201110605Y CNU2007201735335U CN200720173533U CN201110605Y CN 201110605 Y CN201110605 Y CN 201110605Y CN U2007201735335 U CNU2007201735335 U CN U2007201735335U CN 200720173533 U CN200720173533 U CN 200720173533U CN 201110605 Y CN201110605 Y CN 201110605Y
- Authority
- CN
- China
- Prior art keywords
- cooling
- water chilling
- natural cooling
- heat exchanger
- chilling unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Abstract
A water chilling unit using the natural cooling technology relates to the technical field of refrigeration. For increasing the operational efficiency and saving operational costs of an existing unit which utilizes a scheme of dry cooling device, the utility model provides a water chilling unit which uses the natural cooling technology, adds a heat exchange loop, connects a heat exchanger to the indoor portion of a cooling loop of the dry cooling device, the heat exchanger is used for heat exchange between cooling media and secondary refrigerants, the heat exchange loop is controlled by a triple automatic regulating valve, when the temperature of the cooling media is lower than that of the secondary refrigerants, the valve is opened, and the cooling media are directly used to cool the secondary refrigerants. The lower the outdoor temperature is, the bigger the natural cooling amount is, and if the outdoor temperature is low enough, the temperature of the secondary refrigerant is enough to bear all the refrigeration requirements. The water chilling unit using the natural cooling technology has the advantages of high operational reliability, simple installment and convenient maintenance. In areas with low outdoor temperature, the composite efficiency and cost of the water chilling unit using the natural cooling technology are even better than those of air-cooled direct evaporation units.
Description
Technical field
The utility model relates to refrigeration technology field, is specifically related to the middle-size and small-size handpiece Water Chilling Units of a kind of main frame in indoor installation.
Background technology
For the middle-size and small-size handpiece Water Chilling Units that requires main frame in indoor installation, adopt the direct vaporation-type unit of cold-producing medium of air-cooled condenser most effective beyond doubt, the easiest a kind of mode is installed, so the cost of this scheme is also minimum; When outdoor unit and indoor units distance is excessive, because cold-producing medium length is apart from problems such as discharge pressure loss and refrigeration oil backflows, just be not suitable for adopting such scheme, often adopt the scheme of dry and cold device this moment, indoor units adopts the direct sweat cooling machine of water-cooled, and cooling water then water is pumped into off-premises station (dry and cold device) and outdoor air heat exchange cooling.But, also there is such problem in the scheme of dry and cold device: though it has solved the excessive problem of indoor and outdoor unit distance, on the efficient and cost of unit, because many heat exchangers and increased the water pump power consumption, the efficient of unit is relatively low, and cost is higher relatively.
The utility model content
For giving full play to the function of dry and cold device system, improve unit efficiency, the utility model provides a kind of application technology of cooling naturally, it has increased a heat exchange loop, indoor section at dry and cold device cooling circuit seals in a heat exchanger, and this heat exchanger is used for the heat exchange of cooling medium and refrigerating medium; This heat exchange loop is controlled with a threeway automatic regulating valve, opens valve when coolant temperature is lower than refrigerant temperature, utilizes cooling medium directly to cool off refrigerating medium (cooling does not need to start compressor naturally).Outdoor temperature is low more, and natural amount of cooling water is big more; When if outdoor temperature is enough low, coolant temperature is also just enough born whole refrigeration demand.
Concrete technical scheme of the present utility model is: it is made up of indoor units 2 and outdoor unit 1; Indoor units 2 comprises condenser 21, compressor 22, evaporimeter 23, expansion valve 24 and coolant pump 25, wherein, condenser 21, compressor 22, evaporimeter 23 and expansion valve 24 form a sealing system by pipeline, outdoor unit 1 forms a cooling water circulation with condenser 21 by pipeline, and coolant pump 25 is arranged on the water return pipeline of this cooling water circulation; It also comprises three-way control valve 26 and heat exchanger 27, three-way control valve 26 is arranged on the water return pipeline between coolant pump 25 and the condenser 21, the cooling medium import and export of heat exchanger 27 is communicated with the outlet of three-way control valve 26 and the cooling medium inlet of condenser 21 respectively, and the refrigerating medium import and export of heat exchanger 27 is communicated with the refrigerating medium entry and exit of evaporimeter 23 respectively.
Wherein, described outdoor unit 1 is dry type cooling unit; Described three-way control valve 26 is the threeway automatic regulating valve.
The beneficial effects of the utility model are as described below:
1, described refrigerating medium cools off naturally to exchange by an indoor heat exchanger and cooling medium and realizes, so refrigerating medium only flows indoor, does not need to consider antifreeze, needn't add anti-icing fluid;
2, this scheme operational reliability height has characteristics easy to maintenance is installed simply;
3, the utility model is a kind of energy-efficient scheme, and the overall efficiency of described scheme and integrated cost are better than air-cooled direct vaporation-type unit.
Description of drawings
Fig. 1 is the systematic schematic diagram of the handpiece Water Chilling Units of applying natural cooling technology described in the utility model.
The specific embodiment
Specify the specific embodiment below in conjunction with Figure of description.
As shown in Figure 1, present embodiment is that handpiece Water Chilling Units is used in a kind of technology cooling, requires handpiece Water Chilling Units to run without interruption in 24 hours; Leaving water temperature maintains 20 ℃ throughout the year; Specified refrigerating capacity is 10kW; The cooling load demand is 5 to 9kW; Minimum-15 ℃ of local outdoor temperature; The highest 37 ℃.It is made up of indoor units 2 and outdoor unit 1; Indoor units 2 comprises condenser 21, compressor 22, evaporimeter 23, expansion valve 24 and coolant pump 25, wherein, condenser 21, compressor 22, evaporimeter 23 and expansion valve 24 form a sealing system by pipeline, outdoor unit 1 forms a cooling water circulation with condenser 21 by pipeline, coolant pump 25 is arranged on the water return pipeline of this cooling water circulation, it also comprises three-way control valve 26 and heat exchanger 27, three-way control valve 26 is arranged on the water return pipeline between coolant pump 25 and the condenser 21, the cooling medium of heat exchanger 27 advances, outlet is communicated with the outlet of three-way control valve 26 and the cooling medium inlet of condenser 21 respectively, and the refrigerating medium of heat exchanger 27 advances, outlet goes out with the refrigerating medium of evaporimeter 23 respectively, inlet is communicated with; Described outdoor unit 1 is dry type cooling unit; Described three-way control valve 26 is the threeway automatic regulating valve.
The basic fundamental specification of unit is as follows:
Compressor specification: the high temperature compressed machine of idle call, 4HP;
Coolant pump specification: 0.37kW, flow 2.2t/h, lift: 200kPa;
Chilled water pump specification: 0.37kW, flow 1.7t/h, lift: 230kPa;
Dry cooler specification: copper tube and fin formula, 4 rows, 0.72 square metre of front face area;
Dry and cold device blower fan: air quantity 6500m3/h. power: 0.55kW;
Evaporimeter: plate type heat exchanger, 12 ℃ of design evaporating temperatures;
Water-cooled condenser: plate type heat exchanger, 55 ℃ of design condensation temperatures; (during 37 ℃ of environment temperatures)
The nature cooling heat exchanger: when plate type heat exchanger, 3 ℃ of mean temperature differences, heat exchange amount 10kW;
Threeway automatic regulating valve: DN25, KV=6.
Based on above-mentioned design, can realize:
Unit is when environment is the highest, and total power input is 3.8kW; Unit is when environment temperature 10 degree are following, and total power input is: 1.3kW. (energy-conservation 65%).
After employing new technology owing to increased natural cooling function, temperature below 13 ℃ naturally cooling begin to enable, the compressor cooling part only needs the part startup, compressor below 10 ℃ substantially all needn't start.Therefore, the whole year operation expense of unit is reduced significantly.
Below be initial cost and the operating cost contrast of adopting different schemes:
| Scheme | Investment of equipment (unit) | Installation fee (unit) | Estimate annual operating cost (unit) | Integrated cost (by 10 year running life, discount rate 5%) (unit) |
| Conventional air-cooled direct vaporation-type handpiece Water Chilling Units | 17200 | 3000 | 13000 | 121000 |
| The conventional handpiece Water Chilling Units that adopts dry and cold device | 22000 | 1500 | 15000 | 139000 |
| The handpiece Water Chilling Units that dry and cold device band cools off naturally | 26000 | 1500 | 9000 | 97000 |
As can be seen from the above table, adopt technical scheme described in the utility model,, also can save 4000 yuan of operating costs every year even compare with the air-cooled direct vaporation-type handpiece Water Chilling Units of routine; If consider the integrated operation cost in 10 years, new scheme can be saved 24000 yuan, saves 20%.From the investment payback time, new departure increase investment part investment payback time is: (26000+1500-17200-3000)/and 4000=1.9.
In addition, because compressor operating time shortens, the life-span is also significantly improved; Therefore the unit maintenance expense also reduces greatly.
As shown in the figure, the natural cooling function that increases is made up of a cooling medium/refrigerating medium heat exchanger and threeway automatic regulating valve and Automatic Control Component thereof, wherein, those skilled in the art can realize automatic control section according to prior art, does not repeat them here.
When the coolant temperature of returning from dry and cold device is lower than the refrigerating medium inlet temperature, and the temperature difference is during greater than design temperature (for example the temperature difference is greater than 5 ℃), the controller output order is opened the three-way control valve bypass circulation, cooling medium inflow heat exchanger and refrigerating medium carry out heat exchange, the cooling refrigerating medium is realized the nature cooling.Three-way control valve is automatically regulated utilizing the nature cooling capacity to greatest extent according to heat exchanger out temperature situation, and adjusts the nature amount of cooling water and stablize the refrigerating medium outlet temperature; The compressor cooling part then only just starts to satisfy refrigeration demand when natural cooling can not be satisfied refrigeration demand fully automatically.
Should be noted that, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, all should be encompassed in the middle of the claim scope of the present utility model.
Claims (3)
1, the handpiece Water Chilling Units of applying natural cooling technology is made up of indoor units (2) and outdoor unit (1); Indoor units (2) comprises condenser (21), compressor (22), evaporimeter (23), expansion valve (24) and coolant pump (25), wherein, condenser (21), compressor (22), evaporimeter (23) and expansion valve (24) form a sealing system by pipeline, outdoor unit (1) forms a cooling water circulation with condenser (21) by pipeline, coolant pump (25) is arranged on the water return pipeline of this cooling water circulation, it is characterized in that: it also comprises three-way control valve (26) and heat exchanger (27), three-way control valve (26) is arranged on the water return pipeline between coolant pump (25) and the condenser (21), the cooling medium of heat exchanger (27) advances, outlet is communicated with the outlet of three-way control valve (26) and the cooling medium inlet of condenser (21) respectively, and the refrigerating medium of heat exchanger (27) advances, outlet goes out with the refrigerating medium of evaporimeter (23) respectively, inlet is communicated with.
2, the handpiece Water Chilling Units of applying natural cooling technology according to claim 1 is characterized in that described outdoor unit (1) is dry type cooling unit.
3, the handpiece Water Chilling Units of applying natural cooling technology according to claim 1 and 2 is characterized in that described three-way control valve (26) is the threeway automatic regulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201735335U CN201110605Y (en) | 2007-09-30 | 2007-09-30 | Water chilling unit with natural cooling technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201735335U CN201110605Y (en) | 2007-09-30 | 2007-09-30 | Water chilling unit with natural cooling technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201110605Y true CN201110605Y (en) | 2008-09-03 |
Family
ID=39895138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201735335U Expired - Lifetime CN201110605Y (en) | 2007-09-30 | 2007-09-30 | Water chilling unit with natural cooling technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201110605Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100501254C (en) * | 2007-09-30 | 2009-06-17 | 阿尔西制冷工程技术（北京）有限公司 | Water chilling unit applying natural cooling technology |
| CN102706048A (en) * | 2012-01-05 | 2012-10-03 | 王全龄 | Antifreeze liquid energy-saving, heating and drying device |
| CN103256669A (en) * | 2012-02-20 | 2013-08-21 | 纬创资通股份有限公司 | Cooling device |
| CN103471293A (en) * | 2013-09-27 | 2013-12-25 | 深圳麦克维尔空调有限公司 | Combined heat exchanger |
| WO2014107968A1 (en) * | 2013-01-09 | 2014-07-17 | 艾默生网络能源有限公司 | Air conditioning system |
| CN108151377A (en) * | 2017-12-22 | 2018-06-12 | 台州龙江化工机械科技有限公司 | The refrigeration system that a kind of anti-liquid hammer occurs |
| CN109154461A (en) * | 2016-05-25 | 2019-01-04 | 开利公司 | For freely cooling down air cooling and the water-cooled freezer unit of application |
| EP3325898B1 (en) | 2015-07-22 | 2021-05-19 | Carrier Corporation | Hydronic system for combining free cooling and mechanical cooling |
| EP4067760A1 (en) * | 2021-03-29 | 2022-10-05 | LGL France S.A.S. | Combined chiller and free cooling system for operation at low ambient temperature |
| EP4067761A3 (en) * | 2021-03-29 | 2022-11-30 | LGL France S.A.S. | Combined chiller and free cooling system for operation at intermediate ambient temperature |
-
2007
- 2007-09-30 CN CNU2007201735335U patent/CN201110605Y/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100501254C (en) * | 2007-09-30 | 2009-06-17 | 阿尔西制冷工程技术（北京）有限公司 | Water chilling unit applying natural cooling technology |
| CN102706048A (en) * | 2012-01-05 | 2012-10-03 | 王全龄 | Antifreeze liquid energy-saving, heating and drying device |
| CN102706048B (en) * | 2012-01-05 | 2016-07-13 | 王全龄 | A kind of anti-icing fluid energy-saving heating drying unit |
| CN103256669A (en) * | 2012-02-20 | 2013-08-21 | 纬创资通股份有限公司 | Cooling device |
| WO2014107968A1 (en) * | 2013-01-09 | 2014-07-17 | 艾默生网络能源有限公司 | Air conditioning system |
| CN103471293A (en) * | 2013-09-27 | 2013-12-25 | 深圳麦克维尔空调有限公司 | Combined heat exchanger |
| EP3325898B1 (en) | 2015-07-22 | 2021-05-19 | Carrier Corporation | Hydronic system for combining free cooling and mechanical cooling |
| CN109154461A (en) * | 2016-05-25 | 2019-01-04 | 开利公司 | For freely cooling down air cooling and the water-cooled freezer unit of application |
| CN108151377B (en) * | 2017-12-22 | 2021-03-02 | 台州龙江化工机械科技有限公司 | Refrigerating system capable of preventing liquid hammer from occurring |
| CN108151377A (en) * | 2017-12-22 | 2018-06-12 | 台州龙江化工机械科技有限公司 | The refrigeration system that a kind of anti-liquid hammer occurs |
| EP4067760A1 (en) * | 2021-03-29 | 2022-10-05 | LGL France S.A.S. | Combined chiller and free cooling system for operation at low ambient temperature |
| EP4067761A3 (en) * | 2021-03-29 | 2022-11-30 | LGL France S.A.S. | Combined chiller and free cooling system for operation at intermediate ambient temperature |
| US11796233B2 (en) | 2021-03-29 | 2023-10-24 | LGL France S.A.S. | Combined chiller and free cooling system for operation at intermediate ambient temperature |
| US11796236B2 (en) | 2021-03-29 | 2023-10-24 | LGL France S.A.S. | Combined chiller and free cooling system for operation at low ambient temperature |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100501254C (en) | Water chilling unit applying natural cooling technology | |
| CN201110605Y (en) | Water chilling unit with natural cooling technology | |
| CN102538100B (en) | Heat pipe composite air conditioning unit for machine room and control method of heat pipe composite air conditioning unit | |
| CN101520219A (en) | All-year cold supply chiller with natural cooling function | |
| CN101520218B (en) | All-year cold supply chiller with natural cooling and cold-accumulation functions | |
| CN104566641A (en) | Energy-saving air conditioning system in data center and heat dissipation method of energy-saving air conditioning system | |
| CN102889650A (en) | Integral combination type computer room air conditioning unit and control method thereof | |
| CN104791925A (en) | Energy-saving type open cold supply system for cooling tower | |
| CN112082282A (en) | Single-working-medium cascade type brine refrigerating system and cooling system | |
| CN202403438U (en) | Plateau air cooling industrial machine set | |
| CN113923937A (en) | Energy-saving cooling control method and system for data center | |
| CN210861760U (en) | Natural cooling refrigerating system | |
| CN102914087B (en) | Heat exchange system of refrigerating unit | |
| CN107764122A (en) | A kind of big temperature difference cold water combined type gradient utilization system based on UTILIZATION OF VESIDUAL HEAT IN | |
| CN202420064U (en) | Air-cooling and water-cooling combined ice maker | |
| CN216522502U (en) | Cooling system of air conditioner condenser and air conditioner | |
| CN215529686U (en) | Cold water type cold station system | |
| CN115289714A (en) | Evaporation condensation heat pump unit with hydraulic module and control method thereof | |
| CN210042712U (en) | Centralized cooling type heat pipe air conditioner multi-split system | |
| CN202709544U (en) | Multistage condensation comprehensive energy-saving efficient heat exchanger | |
| CN201903211U (en) | Refrigeration system | |
| CN207439229U (en) | A kind of big temperature difference cold water combined type gradient utilization system based on UTILIZATION OF VESIDUAL HEAT IN | |
| CN215725244U (en) | Energy-saving cooling tower system | |
| CN110207519B (en) | Series-parallel loop two-phase thermosiphon | |
| CN205593204U (en) | Annual high -efficient cooling cooling water set |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20070930 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |