CN109458644B - Combined type adjustable water mixing ejector energy-saving device - Google Patents

Combined type adjustable water mixing ejector energy-saving device Download PDF

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CN109458644B
CN109458644B CN201811021423.6A CN201811021423A CN109458644B CN 109458644 B CN109458644 B CN 109458644B CN 201811021423 A CN201811021423 A CN 201811021423A CN 109458644 B CN109458644 B CN 109458644B
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water
interface
adjustable
mixing
ejector
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CN109458644A (en
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李晓萍
周海珠
杨彩霞
李以通
张成昱
吴春玲
付强
魏兴
王沨枫
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CHINA ACADEMY OF BUILDING RESEARCH TIANJIN INSTITUTE
China Academy of Building Research CABR
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CHINA ACADEMY OF BUILDING RESEARCH TIANJIN INSTITUTE
China Academy of Building Research CABR
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
    • F24D3/1058—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system disposition of pipes and pipe connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/02—Fluid distribution means
    • F24D2220/0292—Fluid distribution networks

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Abstract

The invention relates to a combined type adjustable water mixing ejector energy-saving device, which comprises: the adjustable muddy water sprayer of one-level, the adjustable muddy water sprayer of second grade, the governing valve, the tee bend that supplies water, return water tee bend 5, 4 interface flanges and the pipeline that is used for carrying on the internal connection. The invention integrates various circuit signal test functions, can dynamically adjust the heating mode of the residential district, realizes that floor heating users independently adjust the household valve, obtains proper heat, greatly reduces the power consumption of the circulating pump while improving the working stability of the water mixing jet pump, and can meet the user requirements and save energy.

Description

Combined type adjustable water mixing ejector energy-saving device
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of town heat supply, in particular to a combined type adjustable water mixing ejector energy-saving device for a secondary heat supply network of a town heat supply system in a residential area.
[ background of the invention ]
Water pumps are generally adopted as circulating pumps of secondary heat supply networks in urban district heating technologies. During the whole heat supply period, the water pump needs to be driven by uninterrupted power, so that a user can obtain enough circulating water. Therefore, a large amount of consumed electric energy is required to provide the circulating power in the secondary heat supply network. Meanwhile, a relatively complete centralized heating system is generally arranged in northern towns of China to serve as basic facilities for building heating in winter. In recent years, more and more users have been using floor heating. These users, unlike users of conventional radiator radiators, require lower heating water temperatures, e.g. 40-50 c, for floor heating. The floor heating user is difficult to avoid excessive heating by adopting the traditional throttle valve and other technologies; in addition, in the building heating system adopting the mixed floor heating and radiator fin type, the mixed water jet pump has poor working stability and the power consumption of the water pump is very high. Based on the problems, the invention provides the energy-saving device of the combined adjustable water mixing ejector, which can dynamically adjust the heating mode of the residential district, realize that floor heating users independently adjust the household valve, obtain proper heat, improve the working stability of the water mixing ejector pump, greatly reduce the power consumption of a circulating pump, meet the user requirements and realize energy conservation.
[ summary of the invention ]
In order to solve the above problems in the prior art, the present invention provides an energy saving device for a composite adjustable water mixing injector, comprising: the water mixing device comprises a primary adjustable water mixing ejector 1, a secondary adjustable water mixing ejector 2, an adjusting valve 3, a water supply tee joint 4, a water return tee joint 5, 4 interface flanges (6-9) and pipelines for internal connection;
the 4 interface flanges are a first interface flange 6, a second interface flange 7, a third interface flange 8 and a fourth interface flange 9;
a water supply interface of the first-stage adjustable water mixing ejector 1 is connected with a water outlet of the water supply tee joint 4; the water return interface is connected with a water outlet of the water return tee joint 5; the water mixing interface is connected with the inlet of the regulating valve 3;
the water supply interface of the second-stage adjustable water mixing ejector 2 is connected with one water outlet of the water supply tee joint 4; the backwater interface is connected with the outlet of the regulating valve 3; the water mixing interface is connected with a second interface flange 7;
the inlet of the regulating valve 3 is connected with the water mixing port of the first-stage adjustable water mixing ejector 1; the outlet of the regulating valve 3 is connected with the water return port of the second-stage adjustable water mixing ejector 2;
one interface of the water supply tee joint 4 is connected with a first interface flange 6, one interface is connected with a water supply interface of the primary adjustable water mixing ejector 1, and the other interface is connected with a water supply interface of the secondary adjustable water mixing ejector 2;
one interface of the water return tee joint 5 is connected with a third interface flange 8, one interface is connected with a fourth interface flange 9, and the other interface is connected with a water return interface of the secondary adjustable water mixing ejector 2.
Further, the first interface flange 6 is connected to an external network for water supply.
Further, the second interface flange 7 is connected with building water supply.
Further, the third interface flange 8 is connected with building backwater.
Further, the third interface flange 8 is connected with an external network backwater.
Further, the hydraulic characteristics of the primary adjustable ejector 1 satisfy the formula (1),
Figure GDA0001961012040000021
Figure GDA0001961012040000022
Figure GDA0001961012040000023
wherein,
Figure GDA0001961012040000031
and
Figure GDA0001961012040000032
the mass flow rates of a water supply port, a water return port and a mixing port of the first-stage adjustable ejector 1 are respectively in kg/s;
Figure GDA0001961012040000033
and
Figure GDA0001961012040000034
the pressure of the water supply port, the pressure of the water return port and the pressure of the mixing port are respectively Pa;
Figure GDA0001961012040000035
is the cross-sectional area of the nozzle outlet in m2；
Figure GDA0001961012040000036
Is the cross-sectional area of the mixing chamber in m2；
Figure GDA0001961012040000037
Is the velocity coefficient of the nozzle;
Figure GDA0001961012040000038
is the velocity coefficient of the mixing chamber;
Figure GDA0001961012040000039
is the velocity coefficient of the diffuser tube;
Figure GDA00019610120400000310
is the velocity coefficient of the mixing chamber inlet section;
wherein the water mixing ratio u in the formula (3) is defined as,
Figure GDA00019610120400000311
further, the field operator manually or electrically adjusts the nozzle areas of the primary adjustable water mixing injector 1 and the secondary adjustable water mixing injector 2.
Further, the first, second, third and fourth interface flanges are interface flanges with the same structure.
The beneficial effects of the invention include: can carry out the dynamic adjustment to the heating mode of this kind of residential district, realize that floor heating user independently adjusts the valve of registering one's residence, obtain the heat of suitability, the power consumption of reduction circulating pump by a wide margin when improving the job stabilization nature of muddy water jet pump, can satisfy user's demand and can realize energy-conservation again.
[ description of the drawings ]
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, and are not to be considered limiting of the invention, in which:
fig. 1 is a schematic view of the composite adjustable mixer ejector economizer of the present invention.
Fig. 2 is a schematic view of an application scenario of the energy-saving device of the combined adjustable water mixing ejector according to the invention.
[ detailed description ] embodiments
The present invention will now be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions are provided only for the purpose of illustrating the present invention and are not to be construed as limiting the present invention.
The invention provides a composite adjustable water mixing ejector energy-saving device. The invention can be arranged at the building entrance of a building and is used for mixing the water supply and return water of the building according to the proportion of the set requirement;
as shown in fig. 1, the energy-saving device for the composite adjustable water mixing ejector comprises: the water mixing device comprises a primary adjustable water mixing ejector 1, a secondary adjustable water mixing ejector 2, an adjusting valve 3, a water supply tee joint 4, a water return tee joint 5, 4 interface flanges (6-9) and pipelines for internal connection;
the 4 interface flanges are a first interface flange 6, a second interface flange 7, a third interface flange 8 and a fourth interface flange 9;
a water supply interface of the first-stage adjustable water mixing ejector 1 is connected with a water outlet of the water supply tee joint 4; the water return interface is connected with a water outlet of the water return tee joint 5; the water mixing interface is connected with the inlet of the regulating valve 3;
the water supply interface of the second-stage adjustable water mixing ejector 2 is connected with one water outlet of the water supply tee joint 4; the backwater interface is connected with the outlet of the regulating valve 3; the water mixing interface is connected with a second interface flange 7;
the inlet of the regulating valve 3 is connected with the water mixing port of the first-stage adjustable water mixing ejector 1; the outlet of the regulating valve 3 is connected with the water return port of the second-stage adjustable water mixing ejector 2;
one interface of the water supply tee joint 4 is connected with a first interface flange 6, one interface is connected with a water supply interface of the primary adjustable water mixing ejector 1, and the other interface is connected with a water supply interface of the secondary adjustable water mixing ejector 2;
one interface of the water return tee joint 5 is connected with a third interface flange 8, one interface is connected with a fourth interface flange 9, and the other interface is connected with a water return interface of the secondary adjustable water mixing ejector 2;
preferably: the first interface flange 6 is connected to an external network for water supply;
preferably: the second interface flange 7 is connected with building water supply;
preferably: the third interface flange 8 is connected with the building backwater;
preferably: the third interface flange 8 is connected with the external network backwater;
the field operators manually or electrically adjust the nozzle areas of the first-stage adjustable water mixing ejector 1 and the second-stage adjustable water mixing ejector 2, and change the water mixing proportion of the water supply quantity of the external network and the water return quantity of the building, so as to achieve the purpose of setting the water supply quantity and the water temperature of the building;
preferably: the hydraulic characteristics of the primary adjustable ejector 1 satisfy the formula (1),
Figure GDA0001961012040000051
Figure GDA0001961012040000052
Figure GDA0001961012040000053
wherein,
Figure GDA0001961012040000054
and
Figure GDA0001961012040000055
the mass flow rates of a water supply port, a water return port and a mixing port of the first-stage adjustable ejector 1 are respectively in kg/s;
Figure GDA0001961012040000056
and
Figure GDA0001961012040000057
the pressure of the water supply port, the pressure of the water return port and the pressure of the mixing port are respectively Pa;
Figure GDA0001961012040000058
is the cross-sectional area of the nozzle outlet in m2；
Figure GDA0001961012040000059
Is the cross-sectional area of the mixing chamber in m2；
Figure GDA00019610120400000510
Is the velocity coefficient of the nozzle;
Figure GDA00019610120400000511
is the velocity coefficient of the mixing chamber;
Figure GDA00019610120400000512
is the velocity coefficient of the diffuser tube;
Figure GDA00019610120400000513
is the velocity coefficient of the mixing chamber inlet section;
wherein the water mixing ratio u in the formula (3) is defined as,
Figure GDA00019610120400000514
preferably: the hydraulic characteristics of the secondary adjustable ejector 2 need to satisfy the formula (5);
Figure GDA0001961012040000061
Figure GDA0001961012040000062
Figure GDA0001961012040000063
wherein,
Figure GDA0001961012040000064
and
Figure GDA0001961012040000065
the mass flow rates of a water supply port, a water return port and a mixing port of the two-stage adjustable ejector 2 are respectively in kg/s;
Figure GDA0001961012040000066
and
Figure GDA0001961012040000067
the pressure of the water supply port, the pressure of the water return port and the pressure of the mixing port are respectively Pa;
Figure GDA0001961012040000068
is the cross-sectional area of the nozzle outlet, m2；
Figure GDA0001961012040000069
Is the cross-sectional area of the mixing chamber in m2；
Figure GDA00019610120400000610
Is the velocity coefficient of the nozzle;
Figure GDA00019610120400000611
is the velocity coefficient of the mixing chamber;
Figure GDA00019610120400000612
is the velocity coefficient of the diffuser tube;
Figure GDA00019610120400000613
is the velocity coefficient of the mixing chamber inlet section;
wherein the water mixing ratio u in the formula (7)IIThe definition is that,
Figure GDA00019610120400000614
preferably: the operating characteristics of the regulating valve 3 need to satisfy the formula (9):
Figure GDA00019610120400000615
wherein, Δ PvThe pressure difference between the front and the back of the regulating valve 3; k is a radical ofvIs the flow coefficient of the regulating valve 3; rhovThe density of water flowing through the regulating valve 3; v. ofvThe flow rate at the regulating valve 3;
preferably: overall water mixing ratio u of energy-saving device of combined type adjustable water mixing ejectorI+IICalculated by formula (10);
Figure GDA0001961012040000071
as can be seen from the above-mentioned relationship,
Figure GDA0001961012040000072
preferably: by adjusting the cross-sectional area of the nozzle
Figure GDA0001961012040000073
And cross-sectional area of nozzle
Figure GDA0001961012040000074
To change the water mixing ratio uIAnd uII(ii) a Thereby adjusting the overall water mixing ratio uI+II；
The energy-saving device of the combined adjustable water mixing ejector provided by the invention adopts the specific cascade mode of two-stage water mixing ejectors, and has the following 4 remarkable advantages:
(1) global water mixing ratio uI+IIThe stability of (2) is greatly increased. When the variation of the hydraulic resistance in the building is not more than +/-50%, the fluctuation range of the global water mixing ratio is not more than +/-3% of the set value, and the variation range of the water supply flow of the ejector is not more than +/-1% of the set value;
(2) when the combined type water mixing ejector device provided by the invention is adopted, the internal operation of a building adopts a mode of small temperature difference and large flow, and the hydraulic imbalance seen by users in the building can be effectively reduced. And the external heat supply network adopts a mode of large temperature difference and small flow, so that the power consumption of the circulating water pump can be effectively reduced. Compared with the traditional throttle valve mode, the circulating flow of the external network can be reduced by 50% in a typical scene, and the power consumption is saved by 30%;
(3) adjustable nozzle area
Figure GDA0001961012040000075
The adjustable range is larger than the range of adopting the first-stage water mixing ejector; in this way, the global water mixing ratio uI+IIThe settable range of (2) is greatly widened to 0.1-15.5;
(4) the operation mode that partial users adopt floor radiator heating, partial users adopt radiator heating in the district house can adopt different muddy water ratio operation modes to both respectively. A user can adjust a home valve according to the requirement by adopting the floor radiator to obtain the required heat with proper degree, so as to avoid excessive heating;
the application of the invention in district heating power pipe network and its energy-saving effect are described by taking a typical residential district with a heating area of 5 ten thousand square meters as an example. The district has 5 residential buildings, and the heat supply area of each building is 1 ten thousand square meters. Wherein, the 1# floor, the 2# floor and the 3# floor are users of radiator radiators; the 4# building and the 5# building are floor heating users.
The composite adjustable water mixing ejector provided by the invention is arranged at the building opening of each building. The working mode of the ejector is as follows: hot water from a district heat supply pipe network enters the interior of a building after being injected and mixed with backwater through a water mixing ejector.
Under the designed working condition, the water supply pressure of the heat source is 4.9bar, and the water return pressure is 2.0 bar. The water supply flow of the ejector 1, the ejector 2 and the ejector 3 is 150T/h, the water return flow is 150T/h, and the mixing flow is 300T/h. At this time, the water mixing ratio of the jet pump was 1.0. The water supply flow of the ejector 4 and the ejector 5 is 140T/h, the water return flow is 180T/h, and the mixed flow is 330T/h. At this time, the mixing ratio of the jet pump was 1.286.
When the water supply temperature of the heat source is 70 ℃, the water return temperature of the users of the 1# building, the 2# building and the 3# building is designed to be 50 ℃. According to the designed water mixing ratio of 1.0, the inlet temperature of the radiator radiators of the 1# floor, the 2# floor and the 3# floor can be 60 ℃. In a building, the temperature drop of the user radiator is only 10 ℃, but the flow rate can reach 300T/h. The 'small temperature difference and large flow' mode of operation in the building can effectively reduce hydraulic unbalance seen by users in the building. And the external heat supply network from the heat source to the building inlet adopts a large temperature difference and small flow mode, so that the power consumption of the circulating water pump can be effectively reduced.
When the water supply temperature of the heat source is 70 ℃, the water return temperature of the users of the 4# building and the 5# building is designed to be 45 ℃. According to the designed water mixing ratio of 1.2, the inlet temperature of the floor heating radiators of the storied building 4 and the storied building 5 can be 55.9 ℃. Compared with radiator users, the average heating temperature of the floor heating users is lower. In addition, in the 4# building and the 5# building, the temperature of the ground heating radiator is reduced by only 10.9 ℃, but the flow rate can reach 320T/h. Similarly, the 4# building and the 5# building also have a mode of 'small temperature difference and large flow' in-building operation.
When the internal resistance of the 1# floor to the 5# floor changes by +/-50%, the water supply flow of the ejector in which each floor opening is positioned changes within +/-1%, and the fluctuation range of the water mixing ratio of the ejector does not exceed +/-3% of a set value. . Therefore, the composite water mixing ejector device provided by the invention can greatly improve the water supply stability of buildings.
Compared with the traditional throttle valve mode, under the typical scene, the circulation flow of the external network can be reduced by 50%, and the power consumption can be saved by 30%.
Compared with the traditional single-stage water mixing ejector, the combined water mixing ejector device provided by the invention has 2 stages of ejectors for cascade operation. Therefore, the two adjustable ejectors are arranged, the total adjustable sectional area of the nozzle is improved, and the adjustment range of the overall water mixing ratio can be greatly improved. In this example, the nozzle global water mixing ratio uI+IIThe settable range of (2) is greatly widened to 0.1-15.5.
The above description is only a preferred embodiment of the present invention, and all equivalent changes or modifications of the structure, characteristics and principles described in the present invention are included in the scope of the present invention.

Claims (7)

1. The utility model provides an adjustable muddy water ejector economizer of combined type which characterized in that, adjustable muddy water ejector economizer of combined type includes: the water mixing device comprises a primary adjustable water mixing ejector (1), a secondary adjustable water mixing ejector (2), an adjusting valve (3), a water supply tee joint (4), a water return tee joint (5), 4 interface flanges and pipelines for internal connection;
the 4 interface flanges are a first interface flange (6), a second interface flange (7), a third interface flange (8) and a fourth interface flange (9);
a water supply interface of the primary adjustable water mixing ejector (1) is connected with a water outlet of the water supply tee joint (4); the backwater interface is connected with a water outlet of the backwater tee joint (5); the water mixing interface is connected with the inlet of the regulating valve (3);
a water supply interface of the secondary adjustable water mixing ejector (2) is connected with a water outlet of the water supply tee joint (4); the backwater interface is connected with the outlet of the regulating valve (3); the water mixing interface is connected with a second interface flange (7);
the inlet of the regulating valve (3) is connected with the water mixing port of the first-stage adjustable water mixing ejector (1); the outlet of the regulating valve (3) is connected with the water return port of the secondary adjustable water mixing ejector (2);
one interface of the water supply tee joint (4) is connected with the first interface flange (6), one interface is connected with the water supply interface of the primary adjustable water mixing ejector (1), and the other interface is connected with the water supply interface of the secondary adjustable water mixing ejector (2);
one interface of the water return tee joint (5) is connected with a third interface flange (8), one interface is connected with a fourth interface flange (9), and the other interface is connected with a water return interface of the secondary adjustable water mixing ejector (2);
the hydraulic characteristic of the first-stage adjustable ejector (1) meets the formula (1),
Figure FDA0002960215430000011
Figure FDA0002960215430000012
Figure FDA0002960215430000013
wherein,
Figure FDA0002960215430000014
and
Figure FDA0002960215430000015
the mass flow rates of a water supply port, a water return port and a mixing port of the first-stage adjustable ejector (1) are respectively in kg/s;
Figure FDA0002960215430000016
and
Figure FDA0002960215430000017
the pressure of the water supply port, the pressure of the water return port and the pressure of the mixing port are respectively Pa;
Figure FDA0002960215430000018
is the cross-sectional area of the nozzle outlet in m2；
Figure FDA0002960215430000019
Is the cross-sectional area of the mixing chamber in m2；
Figure FDA00029602154300000110
Is the velocity coefficient of the nozzle;
Figure FDA00029602154300000111
is the velocity coefficient of the mixing chamber;
Figure FDA00029602154300000112
is the velocity coefficient of the diffuser tube;
Figure FDA00029602154300000113
is the velocity coefficient of the mixing chamber inlet section;
wherein the water mixing ratio u in the formula (3) is defined as,
Figure FDA00029602154300000114
the hydraulic characteristic of the secondary adjustable ejector (2) needs to satisfy a formula (5);
Figure FDA0002960215430000021
Figure FDA0002960215430000022
Figure FDA0002960215430000023
wherein,
Figure FDA00029602154300000220
and
Figure FDA0002960215430000025
the mass flow rates of a water supply port, a water return port and a mixing port of the two-stage adjustable ejector (2) are respectively in kg/s;
Figure FDA0002960215430000026
and
Figure FDA0002960215430000027
the pressure of the water supply port, the pressure of the water return port and the pressure of the mixing port are respectively Pa;
Figure FDA0002960215430000028
is the cross-sectional area of the nozzle outlet in m2；
Figure FDA0002960215430000029
Is the cross-sectional area of the mixing chamber in m2；
Figure FDA00029602154300000210
Is the velocity coefficient of the nozzle;
Figure FDA00029602154300000211
is the velocity coefficient of the mixing chamber;
Figure FDA00029602154300000212
is the velocity coefficient of the diffuser tube;
Figure FDA00029602154300000213
is the velocity coefficient of the mixing chamber inlet section;
wherein the water mixing ratio u in the formula (7)IIThe definition is that,
Figure FDA00029602154300000214
the working characteristics of the regulating valve (3) need to satisfy the formula (9):
Figure FDA00029602154300000215
wherein, Δ PvThe pressure difference between the front and the back of the regulating valve (3); k is a radical ofvIs the flow coefficient of the regulating valve (3); rhovThe water density flowing through the regulating valve (3); u. ofvThe flow rate at the regulating valve (3);
overall water mixing ratio u of energy-saving device of combined type adjustable water mixing ejectorI+IICalculated by formula (10);
Figure FDA00029602154300000216
as can be seen from the above-mentioned relationship,
Figure FDA00029602154300000217
by adjusting the cross-sectional area of the nozzle
Figure FDA00029602154300000218
And cross-sectional area of nozzle
Figure FDA00029602154300000219
To change the water mixing ratio uIAnd uII(ii) a Thereby adjusting the overall water mixing ratio uI+II。
2. The combined adjustable mixing injector economizer of claim 1 wherein the first interface flange (6) is connected to an external mains water supply.
3. The combined adjustable mixer ejector energy saving device according to claim 2, characterized in that the second interface flange (7) is connected to the building water supply.
4. The combined adjustable water mixing ejector energy saving device according to claim 3, wherein the fourth interface flange (9) is connected with building backwater.
5. The energy-saving device of the combined adjustable water mixing ejector as recited in claim 4, wherein the third interface flange (8) is connected with an external net backwater.
6. The combined adjustable mixing jet energy saving device according to claim 5, characterized in that the field operator manually or electrically adjusts the nozzle area of the primary adjustable mixing jet (1) and the secondary adjustable mixing jet (2).
7. The composite adjustable energy saving device of claim 6, wherein the first, second, third and fourth interface flanges are the same structure.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1451484A1 (en) * 1986-11-26 1989-01-15 Одесский Технологический Институт Холодильной Промышленности Cryogenic installation
CN106812730A (en) * 2015-12-01 2017-06-09 杭州恒勋能源科技有限公司 A kind of adjustable integral formula multi-stage jet heat pump
CN206875538U (en) * 2017-04-25 2018-01-12 太原市热力公司 Thermal power cogeneration central heating system one-level net direct-furnish heat user heating plant

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1451484A1 (en) * 1986-11-26 1989-01-15 Одесский Технологический Институт Холодильной Промышленности Cryogenic installation
CN106812730A (en) * 2015-12-01 2017-06-09 杭州恒勋能源科技有限公司 A kind of adjustable integral formula multi-stage jet heat pump
CN206875538U (en) * 2017-04-25 2018-01-12 太原市热力公司 Thermal power cogeneration central heating system one-level net direct-furnish heat user heating plant

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