CN103673396A - Heat exchange system - Google Patents
Heat exchange system Download PDFInfo
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- CN103673396A CN103673396A CN201310710441.6A CN201310710441A CN103673396A CN 103673396 A CN103673396 A CN 103673396A CN 201310710441 A CN201310710441 A CN 201310710441A CN 103673396 A CN103673396 A CN 103673396A
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Abstract
Disclosed is a heat exchange system. The heat exchange system is composed of a closed subsystem and an open subsystem. A first heat exchanger of the closed subsystem and a second heat exchanger of the closed subsystem are connected in parallel through a pipeline. A phase change device of the open subsystem is divided into a condensation chamber and a vaporizing chamber through a partition plate and a steam shutter. A liquid outlet of the vaporizing chamber is connected with a pump and a nozzle of an ejector in sequence, and a negative pressure cavity of the ejector is connected with a steam outlet of the condensation chamber. A fluid steam nozzle is installed above the vaporizing chamber, an inlet of the fluid steam nozzle is connected with an outlet of a heating device, and a liquid inlet of the heating device is connected with a heat exchange tower; a liquid steam outlet of the ejector is connected with a non-seal type ejecting box, and a liquid outlet of the ejecting box is connected with a liquid nozzle installed in the heat exchange tower. The first heat exchanger is installed in the condensation chamber, and the second heat exchanger is installed below the liquid nozzle in the heat exchange tower. A liquid level sensor is installed in the vaporizing chamber and controls the working state of the heating device.
Description
Technical field
The present invention relates to a kind of heat-exchange system that can make full use of liquid vapour latent heat and sensible heat.
Background technology
Along with the continuous growth of the size of population and economic developing rapidly, aggravated consumption and the exhaustion of fossil energy, also brought compared with severe contamination and destruction to environment simultaneously.For this reason, people are just to make great efforts greatly to find the outlet of the energy: the one, save the energy, and the 2nd, tap a new source of energy.Up to the present, power-saving technology be take the first law of thermodynamics on the one hand as basis, from amount aspect, sets about, and reduces various losses and waste; From the second law of thermodynamics, from the aspect of matter, set about research on the other hand, utilize low-phase energy (air, soil, water, solar energy, industrial waste heat etc.) to replace a part of high-order energy (coal, oil, electric energy), to save the high-order energy.Therefore, utilize the heat pump techniques of low-phase energy to attract people's attention.
The Energy Efficiency Ratio of heat pump and environment temperature are directly to have relation, if the water of heating uniform temp, be directly proportional to environment temperature, environment temperature more high efficiency is also higher, environment temperature is more inefficient also lower, simultaneously the charging amount of cold-producing medium number, air-breathing, delivery temperature is all the main cause that directly affects efficiency.Utilize a small amount of high-grade electric energy as drive energy, from low-temperature heat source efficient absorption low grade heat energy and be transferred to high temperature heat source, reached the object of " pump heat ".Heat pump techniques is also a kind of technology that improves energy grade, and it is not the process of power conversion, is not subject to the restriction of the energy conversion efficiency limit 100%, but is subject to the restriction of contrary Carnot's cycle efficiency.Its efficiency COP refers to quantity of heat production and input electric energy relatively.Its theoretical efficiency is (operating temperature+273)/temperature rise △ T.When 25 ℃ of operating temperatures, when △ T is 20 ℃, theoretical heating efficiency just can reach COP=15.But in the middle of reality, motor efficiency=0.95, compressor efficiency=0.8, heat exchanger efficiency=0.9, system effectiveness=0.8, gross efficiency is 0.95 * 0.8 * 0.9 * 0.8=0.55.COP reality=15 * 0.55=8.25.Drop in other words the electric energy of 1KW and carry heat energy, when 25 ℃ of operating temperatures, when △ T is 20 ℃, the highest heat that can carry 8.25KW.
Yet different from the situation of air source heat pump manufacturing enterprise fast development, air source heat pump is unsatisfactory in the application feature of China.For a long time, the southern areas such as the Guangdong of air source heat pump Zhi China, Fujian, Zhejiang, Hunan, Jiangxi, Yunnan have obtained some application, and its situation of promoting at northern area is not fully up to expectations.To this, insider points out, under cold climate, is easy to occur the phenomenon of frosting on the unit coil pipe of air source heat pump, and this normal heat supply to whole net for air-source heat pump units is extremely unfavorable.Want to promote air source heat pump in the application of northern area, must solve in time net for air-source heat pump units coil pipe easy this problem of frosting under low temperature environment.But the defrost effect of several defrost technology that adopt in China's net for air-source heat pump units is at present not ideal greatly.
Data according to the large market of air conditioner refrigerating is understood, and the defrost technology adopting in air source heat pump at present mainly contains three kinds: the reverse defrost of cross valve, hot-gas bypass defrost, electrical heating defrost.With regard to applicable cases, utilize this technology of the reverse defrost of cross valve to carry out the product of defrost relatively many.Although the defrost effect of the reverse defrost of cross valve is better, while utilizing this kind of technology to carry out defrost, the compressor of air source heat pump stops heat supply, oppositely does refrigeration entry into service, therefore system heating load is obviously affected.Through relevant test, the heat loss causing while adopting this technology to carry out defrost accounts for 10.2% of air source heat pump total energy consumption loss.This defrost technology also easily causes " liquid hammer " simultaneously, very unfavorable to the normal use of compressor.
In addition, adopt the enterprise of this technology of hot-gas bypass defrost also many.Although the impact that this technology causes whole air source heat pump system is smaller, security is corresponding higher, and its maximum drawback is that the effect of defrost is thorough not.
For above two kinds of technology, the utility ratio of this technology of electrical heating defrost is lower.Although its actual defrost effect is ideal, adopt electrical heating defrost need to use electric heating tube, this increases the energy consumption of air source heat pump, and then its energy-conservation advantage has not been existed.In addition, the service life of electric heating tube is limited, and has the overheated possibility on fire that causes, and also has hidden danger aspect security.
Except above technology, although also proposed maximum average heating load in some documents, control the technology that this class of defrost has new meaning very much, these technology also rest on theoretical research stage at present mostly, and practical application example is seldom.Just because of net for air-source heat pump units coil pipe easy this problem of frosting under low temperature environment, effectively do not solved so far, so the manufacturer of many air source heat pumps is all secretive for this problem of air source heat pump defrost poor effect yet.Because the air source heat pumps energy-saving that this phenomenon is external publicized with it, environmental protection, safety, image that can round-the-clock use are conflicting.
It is reported, the manufacturing enterprise of some air source heat pumps is making some progress aspect the defrost of air source heat pump at present, improved air source heat pump product can normally be used under the environment of subzero 15 degrees Celsius, can adapt to the weather of most areas.But this is for the northern area of extreme severe cold in winter, also slightly inadequate, need further improvement.In a word, not ideal enough having become of defrost effect restricts the key factor that air source heat pump is promoted in China on a large scale, is also " weakness " that numerous manufacturing enterprise had to overcome.Especially China's part also rests on and utilizes nature fossil energy to do the main resource means of heating, this administers haze weather for China very bad impact, how we look for another way is gone to solve the problem of this heating needle-holding hand, is also to administer the problem that China's haze weather stands in the breach.
In air, itself just contains huge heat energy in fact, especially the latent heat of steam also can not be despised, how we remove to develop air can, scientific worker has also done a large amount of trials, if any a kind of heat source tower, it utilizes air can carry out heating, but the existing drawback of existing heat source tower is also very many, non freezing solution can constantly absorb airborne steam in carrying out energy exchange processes with air, thereby non freezing solution concentration is declined, if do not concentrated, its freezing point will raise, even can cause situation about cannot move, if concentrated, certainly will increase energy input, Energy Efficiency Ratio also can decline.Have in view of that, patent of the present invention has adopted does not affect concentrated effect, do not lose the way of steam latent heat yet, adopted injection injection principle to evaporate in lower temperature situation by non freezing solution, and vaporized steam, in heat exchanger, be condensed into again aqueous water, the latent heat of its condensation has fed back to the non freezing solution of heat exchanger inside again, reached perfect absorption water in air vapour latent heat object, and the steam latent heat getting unlike existing heat source tower handle, in non freezing solution concentration process, abandoned in vain again, and to lose concentrated energy consumption, really lose more than gain.
In air, thermal source is what many, and that is endlessly, is also inexhaustible.Just how we adopt the problem that very economical means drive airborne heat energy to shift to high temperature place, and this is a huge problem, is also the problem that is worth going into seriously.
What existing heat source tower was discharged is steam, and it is to lose after having got it to airborne steam latent heat, do not made full use of, and it also concentrates and will consume a part of heat energy non freezing solution; In the larger place of humidity, energy consumption is more, and value is less.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes deficiency of the prior art, provides a kind of liquid vapour latent heat can fully be utilized, move that parts are few, the heat-exchange system of stable and reliable operation.
The technical scheme that the present invention solves its technical problem employing is: a kind of heat-exchange system, by closed subsystem and open subsystem, formed, a heat exchanger and No. two heat exchangers in described closed subsystem are in parallel by pipeline, and two port A, B of described pipeline are connected with work station; Phase change device in described open subsystem is sealed body structure, adopts dividing plate and steam shutter to be divided into condensation chamber and vaporizer in it, and described dividing plate is positioned at the below of steam shutter; The be linked in sequence nozzle of pump and ejector of the liquid outlet of described vaporizer, the negative pressure cavity of described ejector connects the gas outlet of condensation chamber; Liquid vapour shower nozzle is installed in the top of vaporizer, and the entrance of liquid vapour shower nozzle connects the outlet of heater, and the liquid inlet of heater connects heat exchange tower; The liquid vapor outlet of ejector connects the jet box of non-tight formula, and the liquid outlet of jet box is mounted on the fluid jetting head in heat exchange tower; No. one heat exchanger is arranged in condensation chamber, and No. two heat exchangers are arranged on the below of the fluid jetting head in heat exchange tower; Liquid level sensor is installed in vaporizer, and the liquid level that the liquid level sensor in vaporizer detects vaporizer is during higher than setting value, heater work, otherwise, heater stop work.
Further, place, the parallel entry of a described heat exchanger and No. two heat exchangers is provided with separating liquid valve.
Further, the above and below of described condensation chamber is provided with intake valve and draining valve, and condensed water liquid level sensor is installed in condensation chamber, and the liquid level that condensed water detected when condensed water liquid level sensor is during higher than setting value, intake valve and draining valve are opened simultaneously, air inlet discharge opeing; Otherwise intake valve and draining valve are all in closed condition.
Further, the top of described fluid jetting head is provided with air exhauster, and the sidewall of heat source tower is provided with ventilating opening.
Compared with prior art, the present invention has the following advantages: (l) system flow is simple in structure, and cost of investment is low; (2) operation parts are few, stable and reliable operation; (3) quality is light, volume is little, installation is simple, need not people on duty; (4) both there is no the anxiety of frosting dewfall, can make full use of again the latent heat of water in air vapour, and made it as the important component part of thermal source, and be not subject to condition restriction, in the very large place of humidity, more can show its superiority; (5) Energy Efficiency Ratio is high, more economical more energy-conservation than existing air energy heat pump; (6) liquid vapour latent heat and sensible heat can fully be utilized.
Accompanying drawing explanation
Fig. 1 is the structural representation of one embodiment of the invention.
In figure: 1-separating liquid valve, 2-intake valve, heat exchanger of 3-, 4-phase change device, 5-condensation chamber liquid level sensor, 6-condensation chamber, 7-draining valve, 8-dividing plate, 9-vaporizer, 10-vaporizer liquid level sensor, 11-heater, No. bis-heat exchangers of 12-, 13-heat source tower, 14-air exhauster, 15-fluid jetting head, 16-ventilating opening, 17-jet box, 18-ejector, 19-liquid vapour shower nozzle, 20-pump, 21-steam shutter.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
With reference to accompanying drawing: the present invention consists of closed subsystem and open subsystem; A heat exchanger 3 and No. two heat exchangers 12 in described closed subsystem adopt pipeline in parallel, and two port A, B of pipeline are connected with work station; Phase change device 4 in described open subsystem is sealed body structure, adopts dividing plate 8 and steam shutter 21 to be divided into condensation chamber 6 and vaporizer 9 in it, and dividing plate 8 is positioned at the below of steam shutter 21; The be linked in sequence nozzle of pump 20 and ejector 18 of the liquid outlet of vaporizer 9, the negative pressure cavity of ejector 18 connects the gas outlet of condensation chamber 6; Liquid vapour shower nozzle 19 is installed in the top of vaporizer 9, and the entrance of liquid vapour shower nozzle 19 connects the outlet of heater 11, and the liquid inlet of heater 11 connects heat source tower 13; The liquid vapor outlet of ejector 18 connects jet box 17, and the liquid outlet of jet box 17 is mounted on the fluid jetting head 15 in heat source tower 13; No. one heat exchanger 3 is arranged in condensation chamber 6, and No. two heat exchangers 12 are arranged on the below of the fluid jetting head 15 in heat exchange tower 13; Steam chamber 9 interior installation vaporizer liquid level sensor 10, the liquid level that vaporizer 9 detected when vaporizer liquid level sensor 10 is during higher than setting value, heater 11 work, on the contrary heater 11 quits work.
Separating liquid valve 1 is installed at the place, parallel entry of a described heat exchanger 3 and No. two heat exchangers 12.
The above and below of described condensation chamber 6 arranges intake valve 2 and draining valve 7, the interior installation condensed water of condensation chamber 6 liquid level sensor 5, the liquid level that condensed water detected when condensed water liquid level sensor 5 is during higher than setting value, and intake valve 2 and draining valve 7 are opened simultaneously, air inlet discharge opeing; Otherwise intake valve 2 and draining valve 7 are all in closed condition.
Described separating liquid valve 1, intake valve 2, solidifying chamber liquid level sensor 5, draining valve 7, vaporizer liquid level sensor 10, air exhauster 14, fluid jetting head 15, ejector 18, liquid vapour shower nozzle 19 and pump 20 adopt commercially available prod.Separating liquid valve 1 function is the flow for a heat exchanger 3 and No. two heat exchanger 12 distribution media.
A described heat exchanger 3, No. two heat exchangers 12 adopt air side heat exchanger finned and that can realize adverse current to carry out supporting.
The work station that described port A, B connect is one or one group of thermal energy converter.
Embodiment 1:
Two subsystems: closed subsystem and open subsystem.
A heat exchanger 3 and No. two heat exchangers 12 in closed subsystem adopt pipeline in parallel, and two port A, B of pipeline are connected with work station.
The liquid level that vaporizer 9 detected when vaporizer liquid level sensor 10 is during higher than setting value, heater 11 work, on the contrary heater 11 quits work.
After port B in closed subsystem, forced circulation pump is installed, is allowed the liquid medium in closed subsystem enter a heat exchanger 3 and No. two heat exchangers 12 from port A shunting, then by port B, gone out.In the present embodiment, the liquid medium flowing through in a heat exchanger 3 and No. two heat exchangers 12 does not have artificial intervention.
Embodiment 2:
On the basis of embodiment 1, at the place, parallel entry of a heat exchanger 3 and No. two heat exchangers 12, separating liquid valve 1 is installed.In the present embodiment, the liquid medium flowing through in a heat exchanger 3 and No. two heat exchangers 12 is by separating liquid valve 1 pro rate.
Respectively on the basis of embodiment 1,2, intake valve 2 and draining valve 7 are set in the above and below of condensation chamber 6, the interior installation condensed water of condensation chamber 6 liquid level sensor 5, the liquid level that condensed water detected when condensed water liquid level sensor 5 is during higher than setting value, intake valve 2 and draining valve 7 are opened simultaneously, air inlet discharge opeing; Otherwise intake valve 2 and draining valve 7 are all in closed condition.
Embodiment 5-8:
On the basis of embodiment 1-4, air exhauster 14 is installed above fluid jetting head 15 respectively, and on the sidewall of heat source tower 3, ventilating opening 16 is set.
System of the present invention is applicable to heating, health hot water processed.
Systems Theory of the present invention basis: by the latent heat of a subsystem or/and the thermal energy transfer of sensible heat to another one subsystem, is accepted the subsystem of heat energy works in sensible heat mode.
Operation principle: during heater 11 work, the hot non freezing solution of its generation is or/and steam enters vaporizer 9 by liquid vapour shower nozzle 19, the hot non freezing solution of part is in the interior vaporization of vaporizer 9, steam in vaporizer 9 enters condensation chamber 6 by steam shutter 21, and high temperature heat is passed to heat exchanger 3 No. one with the form of latent heat; Pump 20 is sent into the non freezing solution of not vaporizing in vaporizer 9 at the nozzle of ejector 18, the steam of condensation chamber 6 is connected to the negative pressure cavity of ejector 18 by pipeline, during the nozzle ejection non freezing solution of ejector 18, the negative pressure of the negative pressure cavity of ejector 18 causes certain vacuum environment by condensation chamber 6, and its object is exactly in order to utilize pressure reduction to make steam that vaporizer produces to condensation chamber 6 diffluences; The liquid vapor outlet of ejector 18 is ejected into liquid vapour in jet box 17, and the liquid outlet of jet box 17 is mounted on the fluid jetting head 15 in heat source tower 13; Outer wall with the non freezing solution spray in jet box 17 to No. two heat exchangers 12, that is: two systems are all with the mode transferring heat energy of sensible heat.
Significantly being different from of the present invention and existing heat source tower: the present invention does not only have the anxiety of frosting dewfall, can also make full use of the latent heat of water in air vapour, make it as the important component part of thermal source, like this, just can obtain cheap air energy thermal source, no matter where air can have, and not be subject to condition restriction everywhere, in the very large place of humidity, the present invention more can show its superiority.
Claims (5)
1. a heat-exchange system, it is characterized in that: by closed subsystem and open subsystem, formed, a heat exchanger (3) in described closed subsystem and No. two heat exchangers (12) are in parallel by pipeline, and two port A, B of described pipeline are connected with work station; Phase change device (4) in described open subsystem is sealed body structure, adopts dividing plate (8) and steam shutter (21) to be divided into condensation chamber (6) and vaporizer (9) in it, and dividing plate (8) is positioned at the below of steam shutter (21); The be linked in sequence nozzle of pump (20) and ejector (18) of the liquid outlet of described vaporizer (9), the negative pressure cavity of ejector (18) connects the gas outlet of condensation chamber (6); The top of vaporizer (9) is provided with liquid vapour shower nozzle (19), and the entrance of described liquid vapour shower nozzle (19) connects the outlet of heater (11), and the liquid inlet of described heater (11) connects heat source tower (13); The liquid vapor outlet of described ejector (18) connects jet box (17), and the liquid outlet of described jet box (17) is mounted on the fluid jetting head (15) in heat exchange tower (13); A described heat exchanger (3) is arranged in condensation chamber (6), and No. two heat exchangers (12) are arranged on the below of the fluid jetting head (15) in heat source tower (13); Vaporizer liquid level sensor (10) is installed in described vaporizer (9), the liquid level that vaporizer (9) detected when vaporizer liquid level sensor (10) is during higher than setting value, described heater (11) work, on the contrary described heater (11) quits work.
2. system according to claim 1, is characterized in that: the place, parallel entry of a described heat exchanger (3) and No. two heat exchangers (12) is provided with separating liquid valve (1).
3. system according to claim 1 and 2, it is characterized in that: the above and below of described condensation chamber (6) arranges respectively intake valve (2) and draining valve (7), condensed water liquid level sensor (5) is installed in described condensation chamber (6), the liquid level that condensed water detected when condensed water liquid level sensor (5) is during higher than setting value, described intake valve (2) and draining valve (7) are opened simultaneously, air inlet discharge opeing; Otherwise described intake valve (2) and draining valve (7) are all in closed condition.
4. system according to claim 1 and 2, is characterized in that: the top of described fluid jetting head (15) is provided with air exhauster (14), and on the sidewall of heat source tower (13), ventilating opening (16) is set.
5. system according to claim 3, is characterized in that: the top of described fluid jetting head (15) is provided with air exhauster (14), and on the sidewall of heat source tower (13), ventilating opening (16) is set.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310710441.6A CN103673396B (en) | 2013-12-20 | 2013-12-20 | Heat-exchange system |
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| CN201310710441.6A CN103673396B (en) | 2013-12-20 | 2013-12-20 | Heat-exchange system |
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| CN103673396A true CN103673396A (en) | 2014-03-26 |
| CN103673396B CN103673396B (en) | 2015-11-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108826750A (en) * | 2018-08-21 | 2018-11-16 | 广东省汕头市质量计量监督检测所 | A kind of heat pump energy consumption detection system and its method |
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| CN203657273U (en) * | 2013-12-20 | 2014-06-18 | 湖南创化低碳环保科技有限公司 | Heat exchange device |
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| WO2008074990A1 (en) * | 2006-12-16 | 2008-06-26 | Star Refrigeration Limited | Air-source heat pump |
| CN201513992U (en) * | 2009-09-11 | 2010-06-23 | 湖南大学 | Water-loop heat pump air-conditioning system based on hot-cold source tower |
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| CN108826750A (en) * | 2018-08-21 | 2018-11-16 | 广东省汕头市质量计量监督检测所 | A kind of heat pump energy consumption detection system and its method |
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Inventor after: Jiang Xiongbiao Inventor after: Peng Weijun Inventor before: Liu Bin Inventor before: Liu Xiaojiang |
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Effective date of registration: 20160331 Address after: 417701 science and Technology Industrial Park, Shuangfeng Economic Development Zone, Loudi, Hunan, Loudi Patentee after: Hunan Jinsong Machinery Co., Ltd. Address before: Quan Lu and Lu Lu 410013 high-tech zones in Hunan province Changsha Pine Road interchange of agricultural extension business building 14 floor No. 1462 Patentee before: Hunan Chuanghua Low-carbon Environmental Protection Technology Co., Ltd. |