CN105202810A - Two-stage throttling complete cooling carbon dioxide refrigeration/ heat pump comprehensive experimental bench - Google Patents
Two-stage throttling complete cooling carbon dioxide refrigeration/ heat pump comprehensive experimental bench Download PDFInfo
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- CN105202810A CN105202810A CN201510701400.XA CN201510701400A CN105202810A CN 105202810 A CN105202810 A CN 105202810A CN 201510701400 A CN201510701400 A CN 201510701400A CN 105202810 A CN105202810 A CN 105202810A
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Abstract
The invention discloses a two-stage throttling complete cooling carbon dioxide refrigeration/ heat pump comprehensive experimental bench. The experimental bench is constituted by a water system and a refrigerant system and comprises a carbon dioxide low pressure compressor, a first carbon dioxide oil separator, a first carbon dioxide gas-liquid separator, a second carbon dioxide gas-liquid separator, a carbon dioxide high pressure compressor, a second carbon dioxide oil separator, a refrigerant stop valve group, a first carbon dioxide shell-and-tube heat exchanger, a second carbon dioxide shell-and-tube heat exchanger, a first carbon dioxide finned tube heat exchanger, a second carbon dioxide finned tube heat exchanger, a first electric heater, a second electric heater, a first single type air conditioner, a second single type air conditioner, a first water pump, a second water pump, a first thermal insulation water tank, a second thermal insulation water tank, a flowmeter group, a drying and filtering device and the like. According to the comprehensive experimental bench, by operating on-off states of corresponding refrigerant stop valves, a two-stage trans-critical carbon dioxide air-cooling refrigeration system, an air source heat pump, a water-cooling refrigeration system, an air source condensation heat recovery system, an air-cooling water chilling unit system, a water source heat pump, a water-cooling water chilling unit system and a water source condensation heat recovery system of two stage throttling and completely cooled in the middle can be simulated.
Description
Technical field
The present invention relates to a kind of heat pump, particularly relate to a kind of two-stage throttling complete cooled carbon dioxide refrigerating/heat pump comprehensive experiment table.
Background technology
At present, the twin-stage critical-cross carbon dioxide experimental system that colleges and universities use is all simple heat pump mostly, and its function ratio is more single, and the utilization rate of equipment is lower, is virtually just causing the huge wasting of resources; Testing stand that simultaneously disperse, function singleness can take larger laboratory area; Each colleges and universities are badly in need of the heat pump of function singleness to integrate, and to reduce floor space, improve the utilization rate of equipment, reduce the waste of school in experiment, promote the comprehensive utilization ratio of school experiment equipment.
Summary of the invention
For above-mentioned prior art, the invention provides a kind of two-stage throttling complete cooled carbon dioxide refrigerating/heat pump comprehensive experiment table, cooling condition and heating condition can be simulated, have in the middle of two-stage throttling and cool the functions such as the air-cooled refrigeration system of twin-stage critical-cross carbon dioxide, air source heat pump, water cooled refrigeration system, air-source reclaiming system for condensation heat, air-cooled liquid chillers system, water resource heat pump, water-cooled cold water machine set system and water source reclaiming system for condensation heat completely.
In order to solve the problems of the technologies described above, the technical scheme that two-stage throttling of the present invention complete cooled carbon dioxide refrigerating/heat pump comprehensive experiment table is achieved is:
Comprise carbon dioxide low pressure compressor, carbon dioxide oil eliminator one, refrigerant stop valve group, carbon dioxide gas-liquid separator one, CO 2 high pressure compressor, carbon dioxide oil eliminator two, carbon dioxide shell-and-tube heat exchanger one, carbon dioxide shell-and-tube heat exchanger two, carbon dioxide finned tube exchanger one, carbon dioxide finned tube exchanger two, electric heater one, electric heater two, single entry air conditioner one, single entry air conditioner two, water pump one, water pump two, first attemperater, second attemperater, carbon dioxide gas-liquid separator two, flowmeter group, device for drying and filtering, choke valve one and choke valve two,
Described refrigerant stop valve group comprises 4 refrigerant stop valves, i.e. refrigerant stop valve 1, refrigerant stop valve 29, refrigerant stop valve 3 26 and refrigerant stop valve 4 27, and the installation site of described refrigerant stop valve is all in the refrigerant import department of heat exchanger;
Described refrigerant stop valve group comprises: refrigerant stop valve 1, refrigerant stop valve 29, refrigerant stop valve 3 26 and refrigerant stop valve 4 27;
Described carbon dioxide low pressure compressor 1 have 1 export 3., No. 1 import 1. with No. 2 imports 2.;
Described carbon dioxide oil eliminator 1 have 1 import 3., No. 1 outlet 1. with No. 2 outlet 2.;
Described carbon dioxide gas-liquid separator 4 have No. 1 import 1., No. 2 imports 3., No. 1 outlet 2. with No. 2 outlets 4.;
Described CO 2 high pressure compressor 6 have 1 export 3., No. 1 import 1. with No. 2 imports 2.;
Described carbon dioxide oil eliminator 27 have 1 import 3., No. 1 outlet 1. with No. 2 outlet 2.;
3. 3. the outlet of described carbon dioxide low pressure compressor 1 connect the air inlet of carbon dioxide oil eliminator 1, and 1. No. 1 import connects the exhaust outlet of carbon dioxide gas-liquid separator 2 31; No. 2 imports 2. by the oil return opening of valve 2 and carbon dioxide oil eliminator 3 that is No. 2 export and be 2. connected,
3. 3. the air inlet of described carbon dioxide oil eliminator 1 connect the exhaust outlet of carbon dioxide low pressure compressor 1; 1. 1. No. 1 outlet be connected with No. 1 import of carbon dioxide gas-liquid separator one; 2. 2. No. 2 outlets be connected with oil return opening i.e. No. 2 imports of carbon dioxide low pressure compressor 1 by valve 1;
1. 2. No. 1 outlet of described carbon dioxide gas-liquid separator 1 connect No. 1 import of CO 2 high pressure compressor 5; 3. No. 2 outlets connect the import of choke valve 2 21; 1. 1. its No. 1 import connect No. 1 outlet of carbon dioxide oil eliminator 1; 3. No. 2 imports connect the outlet of choke valve 1;
2. 1. No. 1 import of described CO 2 high pressure compressor 5 connect No. 1 outlet of carbon dioxide gas-liquid separator 4; 2. No. 2 imports are exported by valve 26 and carbon dioxide oil eliminator 27 No. 2 and are 2. connected; 3. 3. outlet be connected with the import of carbon dioxide oil eliminator 27;
3. 3. the air inlet of described carbon dioxide oil eliminator 27 connect the exhaust outlet of CO 2 high pressure compressor 6; 1. No. 1 outlet is connected with carbon dioxide shell-and-tube heat exchanger 1 with carbon dioxide finned tube exchanger 1 with refrigerant stop valve 29 respectively by refrigerant stop valve 1; 2. 2. No. 2 outlets be connected with oil return opening i.e. No. 2 imports of CO 2 high pressure compressor 6 by valve 8;
The outlet of described refrigerant stop valve 1 connects the import of carbon dioxide finned tube exchanger 1; The outlet of described carbon dioxide finned tube exchanger 1 connects the import of flowmeter 2 17; The outlet of described flowmeter 2 17 connects the import of device for drying and filtering 18; The outlet of described device for drying and filtering 18 connects the import of magnetic valve 19; The outlet of described magnetic valve 19 connects the import of choke valve 1; 3. the outlet of described choke valve 1 connects the import of carbon dioxide gas-liquid separator 1; 4. the outlet of described carbon dioxide gas-liquid separator 1 connects the import of choke valve 2 21; The outlet of described choke valve 2 21 connects the import of refrigerant stop valve 4 27; The outlet of described refrigerant stop valve 4 27 connects the import of carbon dioxide finned tube exchanger 2 28; The outlet of described carbon dioxide finned tube exchanger 2 28 connects the import of carbon dioxide gas-liquid separator 31; 1. the outlet of described carbon dioxide gas-liquid separator 31 connects the import of carbon dioxide low pressure compressor 1;
1. the refrigerant import of described carbon dioxide shell-and-tube heat exchanger 1 is exported by refrigerant stop valve 29 and carbon dioxide oil eliminator 27 No. 1 and is 1. connected; 2. refrigerant exit connects the import of flowmeter 2 17; 3. cooling water inlet is connected with the first attemperater 16 by water pump 1; 4. the outlet of cooling water connects the import of flowmeter 1;
The delivery port of described first attemperater 16 is connected with the import of water pump 1; 3. the discharge outlet of described water pump 1 connects the water inlet of carbon dioxide shell-and-tube heat exchanger 1 shell-side; 4. the delivery port of described carbon dioxide shell-and-tube heat exchanger 1 shell-side connects the water inlet of flowmeter 1; The delivery port of described flowmeter 1 is connected with the water inlet of the first attemperater 16;
1. the refrigerant import of described carbon dioxide shell-and-tube heat exchanger 2 25 is connected with choke valve 2 21 by refrigerant stop valve 3 26; 2. refrigerant exit connects the import of carbon dioxide gas-liquid separator 31; 3. water inlet is connected with the second attemperater 22 by water pump 2 23; 4. delivery port connects the import of flowmeter 3 24; The delivery port of described second attemperater 22 is connected with the import of water pump 2 23; 3. the discharge outlet of described water pump 2 13 connects the water inlet of carbon dioxide shell-and-tube heat exchanger 2 25 shell-side; 4. the delivery port of described carbon dioxide shell-and-tube heat exchanger 2 25 shell-side connects the water inlet of flowmeter 2 24; The delivery port of described flowmeter 2 24 is connected with the water inlet of the second attemperater 22.
Wherein single entry air conditioner 1, electric heater 1 and carbon dioxide finned tube exchanger 1 are installed in same keeping warmth space; Single entry air conditioner 2 30, electric heater 2 29 and carbon dioxide finned tube exchanger 2 28 are installed in another keeping warmth space.
The switching between different experiments state is carried out by the on off state controlling refrigerant stop valve in refrigerant stop valve group, institute's simulated reservoir temperature is made to keep constant by controlling single entry air conditioner 1, single entry air conditioner 2 30, electric heater 1 and electric heater 2 29, according to the difference of system experimentation object, simulate cooling condition and heating condition by controlling single entry air conditioner 1, single entry air conditioner 2 30, electric heater 1, electric heater 2 29, first attemperater 16 and the second attemperater 22, described carbon dioxide finned tube exchanger 1, carbon dioxide finned tube exchanger 2 28, carbon dioxide shell-and-tube heat exchanger 1 and carbon dioxide shell-and-tube heat exchanger 2 25 are for realizing the carbon dioxide air cooling refrigeration system simulating the twin-stage Trans-critical cycle form cooled completely in the middle of two-stage throttling, water cooled refrigeration system, air-cooled liquid chillers system, water-cooled cold water machine set system, air source heat pump system, air-source reclaiming system for condensation heat, water source heat pump system and water source reclaiming system for condensation heat.
On the other hand, a kind of two-stage throttling complete cooled carbon dioxide refrigerating/heat pump comprehensive experiment table of the present invention and test method thereof utilize above-mentioned Novel multifunctional heat pump, Teat pump boiler and refrigeration unit experimental bench to switch between following system, in order to simulate cooling condition and heating condition.
1) twin-stage critical-cross carbon dioxide air cooling refrigeration (air source heat pump) system cooled completely in the middle of two-stage throttling: close refrigerant stop valve 29 and refrigerant stop valve 3 26, opens refrigerant stop valve 1 and refrigerant stop valve 4 27;
2) twin-stage critical-cross carbon dioxide water cooled refrigeration (air-source condensing units) system cooled completely in the middle of two-stage throttling: close refrigerant stop valve 1 and refrigerant stop valve 3 26, opens refrigerant stop valve 29 and refrigerant stop valve 4 27;
3) twin-stage critical-cross carbon dioxide air-cooled liquid chillers (water resource heat pump) system cooled completely in the middle of two-stage throttling: close refrigerant stop valve 29 and refrigerant stop valve 4 27, opens refrigerant stop valve 1 and refrigerant stop valve 3 26;
4) twin-stage critical-cross carbon dioxide water-cooled cold water unit (water source condensing units) system cooled completely in the middle of two-stage throttling: close refrigerant stop valve 1 and refrigerant stop valve 4 27, opens refrigerant stop valve 29 and refrigerant stop valve 3 26.
The switching of described refrigeration, heating condition mainly through controlling single entry air-conditioner set and electric heater group regulates simulated reservoir temperature, thus realizes it and mutually switches.
In described different system, the difference of the basis for selecting experiment purpose of valve 1 and valve 26 is carried out differentiated and is chosen, the unlatching of valve 1 and valve 26 or close respectively according to carbon dioxide low pressure compressor 1 and CO 2 high pressure compressor 5 lubricating oil number operate.Choke valve 1 and choke valve 2 21 are all in the state of unlatching in different systems, and the cycle performance of its size viewing system opened adjusts.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention overcomes above-mentioned shortcoming, and the present invention has 2 independently water systems, can realize multi-form heat pump, water heater and refrigeration unit system.Can realize simulating different system such as carbon dioxide air cooling refrigeration, water cooled refrigeration, air-cooled liquid chillers, water-cooled cold water unit, air source heat pump, air-source reclaiming system for condensation heat, water resource heat pump and the water source condensing units etc. that cool twin-stage Trans-critical cycle in the middle of two-stage throttling completely by the switching of corresponding refrigerant stop valve.
Accompanying drawing explanation
Fig. 1 is two-stage throttling of the present invention complete cooled carbon dioxide refrigerating/heat pump comprehensive experiment table schematic diagram;
Fig. 2 is twin-stage critical-cross carbon dioxide air cooling refrigeration (air source heat pump) systematic schematic diagram cooled completely in the middle of two-stage throttling;
Fig. 3 is twin-stage critical-cross carbon dioxide water cooled refrigeration (air-source condensing units) system diagram cooled completely in the middle of two-stage throttling;
Fig. 4 is twin-stage critical-cross carbon dioxide air-cooled liquid chillers (water resource heat pump) system diagram cooled completely in the middle of two-stage throttling;
Fig. 5 is twin-stage critical-cross carbon dioxide water-cooled cold water unit (water source condensing units) system diagram cooled completely in the middle of two-stage throttling.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is described in further detail.
As shown in Figure 1, the present invention includes carbon dioxide low pressure compressor 1, valve 1, carbon dioxide oil eliminator 1, carbon dioxide gas-liquid separator 1, CO 2 high pressure compressor 5, valve 26, carbon dioxide oil eliminator 27, refrigerant stop valve group, single entry air conditioner 1, electric heater 1, carbon dioxide finned tube exchanger 1, carbon dioxide shell-and-tube heat exchanger 1, water pump 1, flowmeter 1, first attemperater 16, flowmeter 2 17, device for drying and filtering 18, magnetic valve 19, choke valve 1, choke valve 2 21, second attemperater 22, water pump 2 23, flowmeter 3 24, carbon dioxide shell-and-tube heat exchanger 2 25, carbon dioxide finned tube exchanger 2 28, electric heater 2 29, single entry air conditioner 2 30, carbon dioxide gas-liquid separator 2 31, described carbon dioxide low pressure compressor 1 have 1 export 3., No. 1 import 1. with No. 2 imports 2., described carbon dioxide oil eliminator 1 have 1 import 3., No. 1 outlet 1. with No. 2 outlet 2., described carbon dioxide gas-liquid separator 4 have No. 1 import 1., No. 2 imports 3., No. 1 outlet 2. with No. 2 outlets 4., described CO 2 high pressure compressor 6 have 1 export 3., No. 1 import 1. with No. 2 imports 2., described carbon dioxide oil eliminator 27 have 1 import 3., No. 1 outlet 1. with No. 2 outlet 2., described carbon dioxide shell-and-tube heat exchanger 1 and carbon dioxide shell-and-tube heat exchanger 2 25 have respectively 1 refrigerant import 1., 1 refrigerant exit 2., 1 water inlet 3. with 1 water out 4.,
Described refrigerant stop valve group comprises refrigerant stop valve 1, refrigerant stop valve 29, refrigerant stop valve 3 26 and refrigerant stop valve 4 27; Wherein: the outlet that described refrigerant stop valve 1 is connected to carbon dioxide oil eliminator 27 is 1. and between the import of air-cooled carbon dioxide finned tube exchanger 1; The outlet that described refrigerant stop valve 29 is connected to carbon dioxide oil eliminator 7 is 1. and between the import 1. of carbon dioxide shell-and-tube heat exchanger 1 refrigerant; Described refrigerant stop valve 3 26 is connected to choke valve 2 21 and exports between the import 1. of carbon dioxide shell-and-tube heat exchanger 2 25 refrigerant; Described refrigerant stop valve 4 27 is connected to choke valve 2 21 and exports between the import of carbon dioxide finned tube exchanger 2 28 refrigerant.
According to the difference of experiment purpose, by controlling the on off state of refrigerant stop valve in refrigerant stop valve group and regulating single entry air conditioner 1, single entry air conditioner 2 30, electric heater 1 and electric heater 2 29 to simulate cooling condition and heating condition; Described carbon dioxide finned tube exchanger 1, carbon dioxide finned tube exchanger 2 28, carbon dioxide shell-and-tube heat exchanger 1 and carbon dioxide shell-and-tube heat exchanger 2 25 are for realizing simulating different system such as carbon dioxide air cooling refrigeration, water cooled refrigeration, air-cooled liquid chillers, water-cooled cold water unit, air source heat pump, air-source reclaiming system for condensation heat, water resource heat pump and the water source condensing units etc. that cool twin-stage Trans-critical cycle in the middle of two-stage throttling completely.
Describe in detail below in conjunction with accompanying drawing and utilize above-mentioned two-stage throttling complete cooled carbon dioxide refrigerating/heat pump comprehensive experiment table, realize switching between following system, in order to simulate kinds of experiments.
One, twin-stage critical-cross carbon dioxide air cooling refrigeration (air source heat pump) system cooled completely in the middle of two-stage throttling: as shown in Figure 2, close refrigerant stop valve 29 and refrigerant stop valve 3 26, open refrigerant stop valve 1 and refrigerant stop valve 4 27.
3. 3. the exhaust outlet of described carbon dioxide low pressure compressor 1 be connected with the import of carbon dioxide oil eliminator 1, and 2. the oil return opening of carbon dioxide low pressure compressor 1 i.e. No. 2 imports are exported by valve 2 and carbon dioxide oil eliminator 1 No. 2 and be 2. connected; 1. 1. No. 1 outlet of described carbon dioxide oil eliminator 1 connect No. 1 import of carbon dioxide gas-liquid separator 1; 1. 2. No. 1 outlet of described carbon dioxide gas-liquid separator 1 connect No. 1 import of CO 2 high pressure compressor 5; 3. 3. the outlet of described CO 2 high pressure compressor 5 connect the import of carbon dioxide oil eliminator 27; 2. 2. No. 2 outlets of described carbon dioxide oil eliminator 27 be connected with No. 2 imports of CO 2 high pressure compressor 5 by valve 26, and 1. No. 1 outlet connects the import of refrigerant stop valve 1; The outlet of described refrigerant stop valve 1 connects the import of carbon dioxide finned tube exchanger 1; The outlet of described carbon dioxide finned tube exchanger 1 connects the import of flowmeter 2 17; The outlet of described flowmeter 2 17 connects the import of device for drying and filtering 18; The outlet of described device for drying and filtering 18 connects the import of magnetic valve 19; The outlet of described magnetic valve 19 connects the import of choke valve 1; 3. the outlet of described choke valve 1 connects the import of carbon dioxide gas-liquid separator 1; 4. the outlet of described carbon dioxide gas-liquid separator 1 connects the import of choke valve 2 21; The outlet of described choke valve 2 21 connects the import of refrigerant stop valve 4 27; The outlet of described refrigerant stop valve 4 27 connects the import of carbon dioxide finned tube exchanger 2 28; The outlet of described carbon dioxide finned tube exchanger 2 28 connects the import of carbon dioxide gas-liquid separator 31; 1. the outlet of described carbon dioxide gas-liquid separator 31 connects the import of carbon dioxide low pressure compressor 1;
Described valve 1 and valve 26 choose and keying is determined on a case-by-case basis;
Described choke valve 1 and choke valve 2 21 are in the state often opened in the process of system cloud gray model, and the cycle performance when size of its aperture answers viewing system to run just regulates;
Described circulation can experimentally object difference and respectively as the air-cooled refrigeration system and the air source heat pump system that cool twin-stage critical-cross carbon dioxide form in the middle of two-stage throttling completely.
Two, twin-stage critical-cross carbon dioxide water cooled refrigeration (air-source condensing units) system cooled completely in the middle of one-level throttling: as shown in Figure 3, close refrigerant stop valve 1 and refrigerant stop valve 3 26, open refrigerant stop valve 29 and refrigerant stop valve 4 27.
Coolant system: 3. 3. the exhaust outlet of described carbon dioxide low pressure compressor 1 be connected with the import of carbon dioxide oil eliminator 1,2. the oil return opening of carbon dioxide low pressure compressor 1 i.e. No. 2 imports are exported by valve 2 and carbon dioxide oil eliminator 1 No. 2 and are 2. connected; 1. 1. No. 1 outlet of described carbon dioxide oil eliminator 1 connect No. 1 import of carbon dioxide gas-liquid separator 1; 1. 2. No. 1 outlet of described carbon dioxide gas-liquid separator 1 connect No. 1 import of CO 2 high pressure compressor 5; 3. 3. the outlet of described CO 2 high pressure compressor 5 connect the import of carbon dioxide oil eliminator 27; 2. 2. No. 2 outlets of described carbon dioxide oil eliminator 27 be connected with No. 2 imports of CO 2 high pressure compressor 5 by valve 26, and 1. No. 1 outlet connects the import of refrigerant stop valve 29; 1. the outlet of described refrigerant stop valve 29 connects the import of carbon dioxide shell-and-tube heat exchanger 1; 2. the outlet of described carbon dioxide shell-and-tube heat exchanger 1 connects the import of flowmeter 2 17; The outlet of described flowmeter 2 17 connects the import of device for drying and filtering 18; The outlet of described device for drying and filtering 18 connects the import of magnetic valve 19; The outlet of described magnetic valve 19 connects the import of choke valve 1; 3. the outlet of described choke valve 1 connects No. 2 imports of carbon dioxide gas-liquid separator 1; 4. No. 2 outlets of described carbon dioxide gas-liquid separator 1 connect the import of refrigerant stop valve 4 27; The outlet of described refrigerant stop valve 4 27 connects the import of carbon dioxide finned tube exchanger 2 28; The outlet of described carbon dioxide finned tube exchanger 2 28 connects the import of carbon dioxide gas-liquid separator 31; 1. the outlet of described carbon dioxide gas-liquid separator 31 connects the import of carbon dioxide low pressure compressor 1;
Water system: the delivery port of described first attemperater 16 is connected with the import of water pump 1; 3. the discharge outlet of described water pump 1 connects the water inlet of carbon dioxide shell-and-tube heat exchanger 1 shell-side; 4. the delivery port of described carbon dioxide shell-and-tube heat exchanger 1 shell-side connects the water inlet of flowmeter 1; The delivery port of described flowmeter 1 is connected with the water inlet of the first attemperater 16;
Described valve 1 and valve 26 choose and keying is determined on a case-by-case basis;
Described choke valve 1 and choke valve 2 21 are in the state often opened in the process of system cloud gray model, and the cycle performance when size of its aperture answers viewing system to run just regulates;
Described circulation can experimentally object difference and respectively as the water cooled refrigeration system of the twin-stage critical-cross carbon dioxide form cooled completely in the middle of two-stage throttling and air-source reclaiming system for condensation heat.
Three, twin-stage critical-cross carbon dioxide air-cooled liquid chillers (water resource heat pump) system cooled completely in the middle of one-level throttling: as shown in Figure 4, close refrigerant stop valve 29 and refrigerant stop valve 4 27, open refrigerant stop valve 1 and refrigerant stop valve 3 26.
Coolant system: 3. 3. the exhaust outlet of described carbon dioxide low pressure compressor 1 be connected with the import of carbon dioxide oil eliminator 1,2. the oil return opening of carbon dioxide low pressure compressor 1 i.e. No. 2 imports are exported by valve 2 and carbon dioxide oil eliminator 1 No. 2 and are 2. connected; 1. 1. No. 1 outlet of described carbon dioxide oil eliminator 1 connect No. 1 import of carbon dioxide gas-liquid separator 1; 1. 2. No. 1 outlet of described carbon dioxide gas-liquid separator 1 connect No. 1 import of CO 2 high pressure compressor 5; 3. 3. the outlet of described CO 2 high pressure compressor 5 connect the import of carbon dioxide oil eliminator 27; 2. 2. No. 2 outlets of described carbon dioxide oil eliminator 27 be connected with No. 2 imports of CO 2 high pressure compressor 5 by valve 26, and 1. No. 1 outlet connects the import of refrigerant stop valve 1; The outlet of described refrigerant stop valve 1 connects the import of carbon dioxide finned tube exchanger 1; The outlet of described carbon dioxide finned tube exchanger 1 connects the import of flowmeter 2 17; The outlet of described flowmeter 2 17 connects the import of device for drying and filtering 18; The outlet of described device for drying and filtering 18 connects the import of magnetic valve 19; The outlet of described magnetic valve 19 connects the import of choke valve 1; 3. the outlet of described choke valve 1 connects No. 2 imports of carbon dioxide gas-liquid separator 1; 4. No. 2 outlets of described carbon dioxide gas-liquid separator 1 connect the import of refrigerant stop valve 3 26; 1. the outlet of described refrigerant stop valve 3 26 connects the import of carbon dioxide shell-and-tube heat exchanger 2 25; 2. the outlet of described carbon dioxide shell-and-tube heat exchanger 2 25 connects the import of carbon dioxide gas-liquid separator 31; 1. the outlet of described carbon dioxide gas-liquid separator 31 connects the import of carbon dioxide low pressure compressor 1;
Water system: the delivery port of described second attemperater 22 is connected with the import of water pump 2 23; 3. the discharge outlet of described water pump 2 13 connects the water inlet of carbon dioxide shell-and-tube heat exchanger 2 25 shell-side; 4. the delivery port of described carbon dioxide shell-and-tube heat exchanger 2 25 shell-side connects the water inlet of flowmeter 2 24; The delivery port of described flowmeter 2 24 is connected with the water inlet of the second attemperater 22;
Described valve 1 and valve 26 choose and keying is determined on a case-by-case basis;
Described choke valve 1 and choke valve 2 21 are in the state often opened in the process of system cloud gray model, and the cycle performance when size of its aperture answers viewing system to run just regulates;
Described circulation can experimentally object difference and respectively as the air-cooled liquid chillers system and the water source heat pump system that cool twin-stage critical-cross carbon dioxide form in the middle of two-stage throttling completely.
Four, twin-stage critical-cross carbon dioxide water-cooled cold water unit (water source condensing units) system cooled completely in the middle of one-level throttling: as shown in Figure 5, close refrigerant stop valve 1 and refrigerant stop valve 4 27, open refrigerant stop valve 2 10 and refrigerant stop valve 3 26.
Coolant system: 3. 3. the exhaust outlet of described carbon dioxide low pressure compressor 1 be connected with the import of carbon dioxide oil eliminator 1,2. the oil return opening of carbon dioxide low pressure compressor 1 i.e. No. 2 imports are exported by valve 2 and carbon dioxide oil eliminator 1 No. 2 and are 2. connected; 1. 1. No. 1 outlet of described carbon dioxide oil eliminator 1 connect No. 1 import of carbon dioxide gas-liquid separator 1; 1. 2. No. 1 outlet of described carbon dioxide gas-liquid separator 1 connect No. 1 import of CO 2 high pressure compressor 5; 3. 3. the outlet of described CO 2 high pressure compressor 5 connect the import of carbon dioxide oil eliminator 27; 2. 2. No. 2 outlets of described carbon dioxide oil eliminator 27 be connected with No. 2 imports of CO 2 high pressure compressor 5 by valve 26, and 1. No. 1 outlet connects the import of refrigerant stop valve 29; 1. the outlet of described refrigerant stop valve 29 connects the import of carbon dioxide shell-and-tube heat exchanger 1; 2. the outlet of described carbon dioxide shell-and-tube heat exchanger 1 connects the import of flowmeter 2 17; The outlet of described flowmeter 2 17 connects the import of device for drying and filtering 18; The outlet of described device for drying and filtering 18 connects the import of magnetic valve 19; The outlet of described magnetic valve 19 connects the import of choke valve 1; 3. the outlet of described choke valve 1 connects No. 2 imports of carbon dioxide gas-liquid separator 1; 4. No. 2 outlets of described carbon dioxide gas-liquid separator 1 connect the import of refrigerant stop valve 3 26; 1. the outlet of described refrigerant stop valve 3 26 connects the import of carbon dioxide shell-and-tube heat exchanger 2 25; 2. the outlet of described carbon dioxide shell-and-tube heat exchanger 2 25 connects the import of carbon dioxide gas-liquid separator 31; 1. the outlet of described carbon dioxide gas-liquid separator 31 connects the import of carbon dioxide low pressure compressor 1;
Water system: the delivery port of described first attemperater 16 is connected with the import of water pump 1; 3. the discharge outlet of described water pump 1 connects the water inlet of carbon dioxide shell-and-tube heat exchanger 1 shell-side; 4. the delivery port of described carbon dioxide shell-and-tube heat exchanger 1 shell-side connects the water inlet of flowmeter 1; The delivery port of described flowmeter 1 is connected with the water inlet of the first attemperater 16; The delivery port of described second attemperater 22 is connected with the import of water pump 2 23; 3. the discharge outlet of described water pump 2 13 connects the water inlet of carbon dioxide shell-and-tube heat exchanger 2 25 shell-side; 4. the delivery port of described carbon dioxide shell-and-tube heat exchanger 2 25 shell-side connects the water inlet of flowmeter 2 24; The delivery port of described flowmeter 2 24 is connected with the water inlet of the second attemperater 22;
Described valve 1 and valve 26 choose and keying is determined on a case-by-case basis;
Described choke valve 1 and choke valve 2 21 are in the state often opened in the process of system cloud gray model, and the cycle performance when size of its aperture answers viewing system to run just regulates;
Described circulation can experimentally object difference and respectively as the water-cooled cold water unit and the water source reclaiming system for condensation heat that cool twin-stage critical-cross carbon dioxide form in the middle of two-stage throttling completely.
The summary that refrigerant in two-stage throttling complete cooled carbon dioxide refrigerating/heat pump comprehensive experiment table circulates in systems in which:
The pressure produced in carbon dioxide finned tube exchanger 2 28 or carbon dioxide shell-and-tube heat exchanger 2 25 is P
0low-pressure steam, is first sucked by carbon dioxide low pressure compressor 1 and is compressed to intermediate pressure P after carbon dioxide gas-liquid separator 31
m, then enter carbon dioxide gas-liquid separator one (being commonly called as energy-saving appliance) 4, the carbon dioxide produced with one-level throttling mixes, and makes the temperature of mixed gas equal the saturation temperature t of the gas under corresponding pressure
m, mixed gas enters CO 2 high pressure compressor 5 and is compressed to condensing pressure P further
k, then enter in carbon dioxide finned tube exchanger 1 or carbon dioxide shell-and-tube heat exchanger 1 carry out cooling, condensation.Intermediate pressure P is throttled to through choke valve 1 by carbon dioxide finned tube exchanger 1 or carbon dioxide shell-and-tube heat exchanger 1 liquid out
mafter, enter carbon dioxide gas-liquid separator 1 (being commonly called as energy-saving appliance) and carry out gas-liquid separation, the carbon dioxide separated and from carbon dioxide low pressure compressor 1 enter carbon dioxide gas-liquid separator one (being commonly called as energy-saving appliance) 4 carbon dioxide mixing after enter CO 2 high pressure compressor 5; The liquid separated is throttled to evaporating pressure P through the two-step throttle of choke valve 2 21
0after, enter in carbon dioxide finned tube exchanger 2 28 or carbon dioxide shell-and-tube heat exchanger 2 25 and evaporate, produce cold, the low-pressure steam be evaporated is sucked by carbon dioxide low pressure compressor 1.The carrying out that circulation goes round and begins again like this.
Claims (1)
1. a two-stage throttling complete cooled carbon dioxide refrigerating/heat pump comprehensive experiment table, is characterized in that, comprises carbon dioxide low pressure compressor (1), valve one (2), carbon dioxide oil eliminator one (3), carbon dioxide gas-liquid separator one (4), CO 2 high pressure compressor (5), valve two (6), carbon dioxide oil eliminator two (7), refrigerant stop valve group, single entry air conditioner one (10), electric heater one (11), carbon dioxide finned tube exchanger one (12), carbon dioxide shell-and-tube heat exchanger one (13), water pump one (14), flowmeter one (15), first attemperater (16), flowmeter two (17), device for drying and filtering (18), magnetic valve (19), choke valve one (20), choke valve two (21), second attemperater (22), water pump two (23), flowmeter three (24), carbon dioxide shell-and-tube heat exchanger two (25), carbon dioxide finned tube exchanger two (28), electric heater two (29), single entry air conditioner two (30), carbon dioxide gas-liquid separator two (31),
Described carbon dioxide shell-and-tube heat exchanger one (13) and carbon dioxide shell-and-tube heat exchanger two (25) have respectively 1 refrigerant import 1., 1 refrigerant exit 2., 1 water inlet 3. with 1 water out 4.;
The outlet of described carbon dioxide low pressure compressor (1) 3. connects the air inlet of carbon dioxide oil eliminator one (3) 3., and 1. No. 1 import connects the exhaust outlet of carbon dioxide gas-liquid separator two (31); No. 2 imports 2. by the oil return opening of valve 2 and carbon dioxide oil eliminator (3) that is No. 2 export and be 2. connected,
The air inlet of described carbon dioxide oil eliminator one (3) 3. connects the exhaust outlet of carbon dioxide low pressure compressor (1) 3.; 1. 1. No. 1 outlet be connected with No. 1 import of carbon dioxide gas-liquid separator one; 2. 2. No. 2 outlets be connected with oil return opening i.e. No. 2 imports of carbon dioxide low pressure compressor (1) by valve one (2);
No. 1 outlet of described carbon dioxide gas-liquid separator one (4) 2. connects No. 1 import of CO 2 high pressure compressor (5) 1.; 3. No. 2 outlets connect the import of choke valve two (21); 1. its No. 1 import connects No. 1 outlet of carbon dioxide oil eliminator one (3) 1.; 3. No. 2 imports connect the outlet of choke valve one (20);
No. 1 import of described CO 2 high pressure compressor (5) 1. connects No. 1 outlet of carbon dioxide gas-liquid separator (4) 2.; 2. No. 2 imports are exported by valve two (6) and carbon dioxide oil eliminator two (7) No. 2 and are 2. connected; 3. 3. outlet be connected with the import of carbon dioxide oil eliminator two (7);
The air inlet of described carbon dioxide oil eliminator two (7) 3. connects the exhaust outlet of CO 2 high pressure compressor (6) 3.; 1. No. 1 outlet is connected with carbon dioxide shell-and-tube heat exchanger one (13) with carbon dioxide finned tube exchanger one (12) with refrigerant stop valve two (9) respectively by refrigerant stop valve one (8); 2. 2. No. 2 outlets be connected with oil return opening i.e. No. 2 imports of CO 2 high pressure compressor (6) by valve 8;
The outlet of described refrigerant stop valve one (8) connects the import of carbon dioxide finned tube exchanger one (12); The outlet of described carbon dioxide finned tube exchanger one (12) connects the import of flowmeter two (17); The outlet of described flowmeter two (17) connects the import of device for drying and filtering (18); The outlet of described device for drying and filtering (18) connects the import of magnetic valve (19); The outlet of described magnetic valve (19) connects the import of choke valve one (20); The outlet of described choke valve one (20) connects the import of carbon dioxide gas-liquid separator one (4) 3.; The outlet of described carbon dioxide gas-liquid separator one (4) 4. connects the import of choke valve two (21); The outlet of described choke valve two (21) connects the import of refrigerant stop valve four (27); The outlet of described refrigerant stop valve four (27) connects the import of carbon dioxide finned tube exchanger two (28); The outlet of described carbon dioxide finned tube exchanger two (28) connects the import of carbon dioxide gas-liquid separator (31); 1. the outlet of described carbon dioxide gas-liquid separator 31 connects the import of carbon dioxide low pressure compressor 1;
The refrigerant import of described carbon dioxide shell-and-tube heat exchanger one (13) is 1. exported by refrigerant stop valve two (9) and carbon dioxide oil eliminator two (7) No. 1 and is 1. connected; 2. refrigerant exit connects the import of flowmeter two (17); 3. cooling water inlet is connected with the first attemperater (16) by water pump one (14); 4. the outlet of cooling water connects the import of flowmeter one (15);
The delivery port of described first attemperater (16) is connected with the import of water pump one (14); 3. the discharge outlet of described water pump one (14) connects the water inlet of carbon dioxide shell-and-tube heat exchanger one (13) shell-side; 4. the delivery port of described carbon dioxide shell-and-tube heat exchanger one (13) shell-side connects the water inlet of flowmeter one (15); The delivery port of described flowmeter one (15) is connected with the water inlet of the first attemperater (16);
The refrigerant import of described carbon dioxide shell-and-tube heat exchanger two (25) is 1. connected with choke valve two (21) by refrigerant stop valve three (26); 2. refrigerant exit connects the import of carbon dioxide gas-liquid separator (31); 3. water inlet is connected with the second attemperater (22) by water pump two (23); 4. delivery port connects the import of flowmeter three (24);
The delivery port of described second attemperater (22) is connected with the import of water pump two (23); 3. the discharge outlet of described water pump two (13) connects the water inlet of carbon dioxide shell-and-tube heat exchanger two (25) shell-side; 4. the delivery port of described carbon dioxide shell-and-tube heat exchanger two (25) shell-side connects the water inlet of flowmeter two (24); The delivery port of described flowmeter two (24) is connected with the water inlet of the second attemperater (22).
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| CN111247378A (en) * | 2017-10-16 | 2020-06-05 | 株式会社电装 | Heat pump cycle |
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