CN109030041A - Natural draft counter-flow wet cooling tower efficiency measurement method - Google Patents
Natural draft counter-flow wet cooling tower efficiency measurement method Download PDFInfo
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- CN109030041A CN109030041A CN201810577108.5A CN201810577108A CN109030041A CN 109030041 A CN109030041 A CN 109030041A CN 201810577108 A CN201810577108 A CN 201810577108A CN 109030041 A CN109030041 A CN 109030041A
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- 238000001816 cooling Methods 0.000 title claims abstract description 125
- 238000000691 measurement method Methods 0.000 title claims description 22
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- 238000011156 evaluation Methods 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 35
- 238000009423 ventilation Methods 0.000 claims abstract description 32
- 239000000498 cooling water Substances 0.000 claims description 26
- 230000001133 acceleration Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 230000013011 mating Effects 0.000 description 6
- 239000000945 filler Substances 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
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- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
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- 239000002803 fossil fuel Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
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- G—PHYSICS
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Abstract
公开了一种自然通风逆流湿式冷却塔能效测量方法，方法包括：获取自然通风逆流湿式冷却塔的结构参数；测量自然通风逆流湿式冷却塔运行过程中的运行参数，测量自然通风逆流湿式冷却塔运行过程中的循环水泵运行参数，所述循环水泵运行参数包括循环水泵工作电压U及工作电流I，基于所述自然通风逆流湿式冷却塔配套循环水泵消耗泵功获得自然通风逆流湿式冷却塔配套循环水泵消耗泵功W泵功；计算自然通风逆流湿式冷却塔的能效评价指标η，当能效评价指标η＜a时，确定自然通风逆流湿式冷却塔能效评价为低能效，当能效评价指标a≤η＜b时，确定自然通风逆流湿式冷却塔能效评价为中能效，当能效评价指标η≥b，确定自然通风逆流湿式冷却塔能效评价为高能效。
A method for measuring energy efficiency of a natural draft counterflow wet cooling tower is disclosed, the method comprising: obtaining structural parameters of the natural draft counterflow wet cooling tower; measuring operating parameters during the operation of the natural draft counterflow wet cooling tower; The operating parameters of the circulating water pump in the process, the operating parameters of the circulating water pump include the operating voltage U and the operating current I of the circulating water pump. Consumption of pump work W pump work ; calculate the energy efficiency evaluation index η of the natural ventilation counterflow wet cooling tower, when the energy efficiency evaluation index η<a, determine the energy efficiency evaluation of the natural ventilation counterflow wet cooling tower as low energy efficiency, when the energy efficiency evaluation index a≤η< When b, the energy efficiency evaluation of the natural ventilation counterflow wet cooling tower is determined to be medium energy efficiency, and when the energy efficiency evaluation index η≥b, the energy efficiency evaluation of the natural ventilation counterflow wet cooling tower is determined to be high energy efficiency.
Description
Technical field
The invention belongs to cooling tower technical fields, measure more particularly to a kind of natural draft counter-flow wet cooling tower efficiency
Method.
Background technique
The energy is the basic motive of economic growth and social progress, is the indispensable existence basis of the mankind, importance
It is self-evident.And in the energy that mankind nowadays are consumed, the fossil fuels such as coal still occupy leading position.In recent years, energy
Source crisis constantly aggravates, and energy prices are constantly soaring, and environment and ecological problem are increasingly prominent.Thermoelectricity is in China's generated energy accounting height
Up to 75.2%, therefore, under current energy-saving big target, improves power plants generating electricity efficiency and be of great significance.
In thermal power generation, fuel burns in the boiler releases heat, and water level pressure heat absorption in boiler and superheater became
Hot steam, the steam of high temperature and pressure enter adiabatic expansion in steam turbine and do work, and the steam exhaust after acting is discharged in condenser isobaric
Condensation, to recirculated cooling water heat release, the cooling water for carrying waste heat passes through cooling tower again and heat is transmitted to surrounding air.Due to power plant
The low-temperature condition of middle condenser is to be guaranteed by recirculating cooling water system, therefore the cooling of recirculated water is extremely closed in power generation
It is important.Power plant mostly uses the circulating water supply system with cooling tower.
Natural draft counter-flow wet cooling tower generally comprises tower, water collection device, water distribution system, filler, rain belt and catchments
Several elements such as pond.When operation, water distribution system is entered by vertical shaft by the recirculated water that condenser comes out.Water distribution system
It is in the plane mesh arrangement, then three kinds of groove-splitting water distribution, tubular type water distribution or barrel combination water distribution modes are set by splash
It is standby, water is sprayed on filler and forms moisture film, raindrop is formed after filler and falls into collecting-tank, water after cooling is sent into solidifying by water pump
Vapour device is reused.A bottom air inlet is taken, with herringbone column or intersects elastic supports.Air enters tower body from air inlet, passes through filler
Under rain belt and hot water flow into opposite direction and flow through filler, after the water droplet in air is recycled by water collection device, then go out from tower
Mouth discharge.
Efficiency is the abbreviation of efficiency of energy utilization.Efficiency evaluation (Energy Efficiency Evaluation, referred to as
It EEE) is to be detected, counted to the energy consumption etc. of the efficiency of energy utilization or energy consumption equipment of energy consumption equipment within a certain period of time
It calculates, provides locating level.The correlative study of efficiency evaluation can be summarized as the method based on the first law of thermodynamics and be based on heating power
The method for learning second law.Index based on the first law of thermodynamics has (Tw1-Tw2)/(Tw1-Twb1)(Tw1For cooling water inlet temperature
Degree, Tw2For cooling water outlet temperature, Twb1For air intake wet-bulb temperature)；(Q is heat exchange amount to Q/ Δ p, and Δ p flows over for air
Resistance in journey) etc..These evaluation index clear physics conceptions, have obtained more application in cooling tower performance comparison.It is based on
The second law of thermodynamics has entropy evaluation method,Evaluation method etc., the thermodynamics for reflecting the cooling tower course of work improve journey
Degree.
Above-mentioned all kinds of evaluation indexes or method, are only used for the performance pair of natural draft counter-flow wet cooling tower
Than, and consider that type is single, only cooling tower performance is evaluated from energy point of view, does not fully consider that cooling tower was run
The factors such as water, electrical loss in journey can not carry out Comprehensive Evaluation to cooling tower performance, and carry out efficiency grade classification to it.
Disclosed above- mentioned information are used only for enhancing the understanding to background of the present invention in the background section, it is thus possible to
Information comprising not constituting the prior art known to a person of ordinary skill in the art in home.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention provides a kind of natural draft counter-flow wet cooling tower efficiency measurement
Method has comprehensively considered heat exchange efficiency, consumption rate and water consumption rate factor in cooling tower operational process, and can use power
Repeated factor carries out dynamic regulation to its influence factor for the attention degree to water, electric resources of different regions, can be true
Reflection cooling tower operating condition efficiency it is horizontal.
The purpose of the present invention is be achieved by the following technical programs:
A kind of natural draft counter-flow wet cooling tower efficiency measurement method, includes the following steps:
First step: obtaining the structural parameters of natural draft counter-flow wet cooling tower, and the structural parameters include sparge pipe
Interior bottom absolute altitude h；
Second step: the operating parameter in measurement natural draft counter-flow wet cooling tower operational process, the operating parameter
Including air intake wet-bulb temperature Twb1, cooling water inlet temperature Tw1, cooling water outlet temperature Tw2, circulating water flow mwAnd circulation
Amount of makeup water mΔ, gravity-flow ventilation Counter-current wet is obtained based on the operating parameter in natural draft counter-flow wet cooling tower operational process
Practical heat exchange amount Q in the operational process of cooling towerIt is practical, limit heat exchange amount QThe limit；
Third step measures the water circulating pump operating parameter in natural draft counter-flow wet cooling tower operational process, described
Water circulating pump operating parameter includes water circulating pump operating voltage U and operating current I, cooling based on the gravity-flow ventilation Counter-current wet
The mating water circulating pump consumption pump work of tower obtains the mating water circulating pump of natural draft counter-flow wet cooling tower and consumes pump work WPump work；
Four steps: calculating the efficiency evaluation index η of natural draft counter-flow wet cooling tower,Wherein, α, β-weight factor, alpha+beta=1；QIt is practical、QThe limitGravity-flow ventilation Counter-current wet is cooling
Practical heat exchange amount, limit heat exchange amount in tower operational process, Tw1Cooling water inlet temperature, DEG C；Tw2-
Cooling water outlet temperature, DEG C；Twb1Air intake wet-bulb temperature, DEG C；Bottom in h- Water Distribution of Natural Draft Counter-flow Wet Cooling Towers pipe
Absolute altitude, m；G- acceleration of gravity, m/s2；mwCirculating water flow in natural draft counter-flow wet cooling tower operational process, kg/s；
mΔAmount of makeup water, kg/s are recycled in natural draft counter-flow wet cooling tower operational process；cwThe specific heat of water, kJ/ (kg DEG C)；
WPump workThe mating water circulating pump of natural draft counter-flow wet cooling tower consumes pump work, kW, WPump work=UI；
In 5th step, as efficiency evaluation index η < a, determine that natural draft counter-flow wet cooling tower efficiency evaluation is
Low-energy-efficiency determines that natural draft counter-flow wet cooling tower efficiency evaluation is middle efficiency as efficiency evaluation index a≤η < b, when
Efficiency evaluation index η >=b determines that natural draft counter-flow wet cooling tower efficiency evaluation is high energy efficiency.
In a kind of natural draft counter-flow wet cooling tower efficiency measurement method, the structural parameters include that tower is total
Bottom absolute altitude h in height and sparge pipe.
In a kind of natural draft counter-flow wet cooling tower efficiency measurement method, the operating parameter includes atmosphere
Pressure P, air intake wet-bulb temperature Twb1, inlet air dry-bulb temperature Tdb1, air exit temp T2, cooling water inlet temperature
Tw1, cooling water outlet temperature Tw2, circulating water flow mwAnd circulation amount of makeup water mΔ。
In a kind of natural draft counter-flow wet cooling tower efficiency measurement method, gravity-flow ventilation Counter-current wet is obtained
Water circulating pump parameter in cooling tower cyclic process, the water circulating pump parameter include flow, lift, revolving speed and power.
In a kind of natural draft counter-flow wet cooling tower efficiency measurement method, gravity-flow ventilation Counter-current wet is cooling
Tower heat exchange efficiency isReflect the departure degree of cooling tower practical heat exchange amount and limit heat exchange amount, value is bigger, then deviates journey
It spends smaller.With the product of consumption rate, reflect the heat exchange and power consumption of cooling tower operation.
In a kind of natural draft counter-flow wet cooling tower efficiency measurement method, gravity-flow ventilation Counter-current wet is cooling
The consumption rate of tower is mwgh/WPump work, reflect on-way resistance proportion size in cooling water transport process, value is bigger, then resistance
It is smaller.
In a kind of natural draft counter-flow wet cooling tower efficiency measurement method, gravity-flow ventilation Counter-current wet is cooling
The damage percentage of water loss of tower isReflecting in cooling tower operational process, loss water accounts for the ratio of global cycle water, and value is bigger,
It is smaller then to damage percentage of water loss.
If can suitably tune up α value in the deficient area of electric resources, improve consumption rate proportion in energy efficiency indexes；If
Water resources shortage area, can suitably tune up β value, improve water consumption rate proportion in energy efficiency indexes.
Compared with prior art, the invention has the following beneficial technical effects:
The present invention is right by measuring and calculating the heat exchange efficiency in cooling tower operational process, consumption rate and water consumption rate factor
Free convection reverse flow wet type cooling tower carries out Energy Efficiency Analysis, and utilizes weight factor, for different regions to water, electric resources
Attention degree, dynamic regulation is carried out to its influence factor, can more accurately reflect that the efficiency of cooling tower operating condition is horizontal.
The above description is only an overview of the technical scheme of the present invention, in order to make technological means of the invention clearer
Understand, reach the degree that those skilled in the art can be implemented in accordance with the contents of the specification, and in order to allow the present invention
Above and other objects, features and advantages can be more clearly understood, illustrated below with a specific embodiment of the invention
Explanation.
Detailed description of the invention
By reading the detailed description in hereafter preferred embodiment, various other advantages and benefits of the present invention
It will become apparent to those of ordinary skill in the art.Figure of description only for the purpose of illustrating preferred embodiments,
And it is not to be construed as limiting the invention.It should be evident that drawings discussed below is only some embodiments of the present invention,
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Other attached drawings.
In the accompanying drawings:
The step of Fig. 1 is the natural draft counter-flow wet cooling tower efficiency measurement method of one embodiment of the invention is illustrated
Figure；
Fig. 2 is that the efficiency evaluation of the natural draft counter-flow wet cooling tower efficiency measurement method of one embodiment of the invention refers to
The division schematic diagram of target probability density distribution curve and high, medium and low efficiency level.
Below in conjunction with drawings and examples, the present invention will be further explained.
Specific embodiment
The specific embodiment that the present invention will be described in more detail below with reference to accompanying drawings.Although being shown in attached drawing of the invention
Specific embodiment, it being understood, however, that may be realized in various forms the present invention without that should be limited by embodiments set forth here
System.It is to be able to thoroughly understand the present invention on the contrary, providing these embodiments, and can be complete by the scope of the present invention
Be communicated to those skilled in the art.
It should be noted that having used some vocabulary in the specification and claims to censure specific components.Ability
Field technique personnel it would be appreciated that, technical staff may call the same component with different nouns.This specification and right
It is required that not in such a way that the difference of noun is as component is distinguished, but with the difference of component functionally as differentiation
Criterion."comprising" or " comprising " as mentioned throughout the specification and claims are an open language, therefore should be solved
It is interpreted into " including but not limited to ".Specification subsequent descriptions are to implement better embodiment of the invention, so the description be with
For the purpose of the rule of specification, the range that is not intended to limit the invention.Protection scope of the present invention is when the appended right of view
It is required that subject to institute's defender.
In order to facilitate understanding of embodiments of the present invention, it is done by taking several specific embodiments as an example below in conjunction with attached drawing further
Explanation, and each attached drawing does not constitute the restriction to the embodiment of the present invention.
Natural draft counter-flow wet cooling tower efficiency measurement method according to the present invention as shown in Figure 1, it is a kind of naturally logical
Wind reverse flow wet type cooling tower efficiency measurement method, includes the following steps:
First step S1: obtaining the structural parameters of natural draft counter-flow wet cooling tower, and the structural parameters include water distribution
Bottom absolute altitude h in managing；
Second step S2: the operating parameter in measurement natural draft counter-flow wet cooling tower operational process, the operation ginseng
Number includes air intake wet-bulb temperature Twb1, cooling water inlet temperature Tw1, cooling water outlet temperature Tw2, circulating water flow mwAnd it follows
Ring amount of makeup water mΔ, it is wet that gravity-flow ventilation adverse current is obtained based on the operating parameter in natural draft counter-flow wet cooling tower operational process
Practical heat exchange amount Q in the operational process of formula cooling towerIt is practical, limit heat exchange amount QThe limit；
Third step S3 measures the water circulating pump operating parameter in natural draft counter-flow wet cooling tower operational process, institute
Stating water circulating pump operating parameter includes water circulating pump operating voltage U and operating current I, cold based on the gravity-flow ventilation Counter-current wet
But the mating water circulating pump consumption pump work of tower obtains the mating water circulating pump of natural draft counter-flow wet cooling tower and consumes pump work WPump work；
Four steps S4: calculating the efficiency evaluation index η of natural draft counter-flow wet cooling tower,Wherein, α, β-weight factor, alpha+beta=1；QIt is practical、QThe limitNatural draft counter-flow wet cooling tower
Practical heat exchange amount, limit heat exchange amount in operational process, Tw1Cooling water inlet temperature, DEG C；Tw2It is cold
But water outlet temperature, DEG C；Twb1Air intake wet-bulb temperature, DEG C；Bottom is marked in h- Water Distribution of Natural Draft Counter-flow Wet Cooling Towers pipe
Height, m；G- acceleration of gravity, m/s2；mwCirculating water flow in natural draft counter-flow wet cooling tower operational process, kg/s；mΔ-
Amount of makeup water, kg/s are recycled in natural draft counter-flow wet cooling tower operational process；cwThe specific heat of water, kJ/ (kg DEG C)；
WPump workThe mating water circulating pump of _ natural draft counter-flow wet cooling tower consumes pump work, kW, WPump work=UI；
In 5th step S5, as efficiency evaluation index η < a, natural draft counter-flow wet cooling tower efficiency evaluation is determined
Determine that natural draft counter-flow wet cooling tower efficiency evaluation is middle efficiency as efficiency evaluation index a≤η < b for low-energy-efficiency,
As efficiency evaluation index η >=b, determine that natural draft counter-flow wet cooling tower efficiency evaluation is high energy efficiency.
In the present invention, α, β can be adjusted, according to locality to the attention degree of electric power and water resource thus scientific
Effective reflection cooling tower efficiency is horizontal, and for a further understanding of the present invention, Fig. 2 is the gravity-flow ventilation of one embodiment of the invention
The probability density distribution curve of the efficiency evaluation index of reverse flow wet type cooling tower efficiency measurement method and high, medium and low efficiency are horizontal
Division schematic diagram.As η < a, natural draft counter-flow wet cooling tower efficiency evaluation is low-energy-efficiency, naturally logical as a≤η < b
Wind reverse flow wet type cooling tower efficiency evaluation is high energy efficiency, during then natural draft counter-flow wet cooling tower efficiency evaluation is between η >=b
Efficiency.
Table 1 is cooling tower efficiency grade classification example, inquires in table 1 and is commented cooling tower locating in all cooling towers
Efficiency is horizontal.If η is in low-energy-efficiency area, it is meant that the cooling tower should not be used as energy-efficient equipment, do not encourage to produce and promote；
If η is in middle efficiency area or high energy efficiency area, it is meant that the cooling tower belongs to energy-efficient equipment, and production and popularization should be encouraged to make
With.
Table 1
| Efficiency subregion | Efficiency evaluation indication range | Shared whole percentage |
| Low-energy-efficiency area | η < a | 20% |
| Middle efficiency area | A≤η < b | 50% |
| High energy efficiency area | η≥b | 30% |
It is described in a kind of preferred embodiment of natural draft counter-flow wet cooling tower efficiency measurement method of the present invention
Structural parameters include absolute altitude h in bottom in tower total height and sparge pipe.
It is described in a kind of preferred embodiment of natural draft counter-flow wet cooling tower efficiency measurement method of the present invention
Operating parameter includes atmospheric pressure P, air intake wet-bulb temperature Twb1, inlet air dry-bulb temperature Tdb1, air exit temp T2、
Cooling water inlet temperature Tw1, cooling water outlet temperature Tw2, circulating water flow mwAnd circulation amount of makeup water mΔ；
In a kind of preferred embodiment of natural draft counter-flow wet cooling tower efficiency measurement method of the present invention, obtain
Water circulating pump parameter in natural draft counter-flow wet cooling tower cyclic process, the water circulating pump parameter include flow, lift,
Revolving speed and power.
It is natural in a kind of preferred embodiment of natural draft counter-flow wet cooling tower efficiency measurement method of the present invention
Ventilation reverse flow wet type cooling tower heat exchange efficiency beReflect the departure degree of cooling tower practical heat exchange amount and limit heat exchange amount,
Its value is bigger, then departure degree is smaller.With the product of consumption rate, reflect cooling tower operation heat exchange with
Power consumption.In a kind of preferred embodiment of natural draft counter-flow wet cooling tower efficiency measurement method of the present invention, from
So the consumption rate of ventilation reverse flow wet type cooling tower is mwgh/WPump work, during reflecting cooling tower actual motion conveying cooling water,
The relative size of transporting resistance on the way, ratio illustrate in the cooling tower design process, in cooling water transmission process closer to 1
Resistance is smaller, can preferably save electric energy.Therefore, this can embody cooling tower to the effective use situation of electric power, if providing in electricity
The deficient area in source, can suitably tune up α value, improve this proportion in energy efficiency indexes；Conversely, then opposite.
It is natural in a kind of preferred embodiment of natural draft counter-flow wet cooling tower efficiency measurement method of the present invention
Ventilation reverse flow wet type cooling tower damage percentage of water loss beIt reflects in cooling tower actual moving process, loss water accounts for circulation
The ratio of water, value illustrate that water consumption is fewer in cooling tower operational process closer to 1, to more save water resource.Therefore,
This can embody cooling tower to the effective use situation of cooling water, if can suitably tune up β value in water resources shortage area, improve
This proportion in energy efficiency indexes；Conversely, then opposite.
Although embodiment of the present invention is described in conjunction with attached drawing above, the invention is not limited to above-mentioned
Specific embodiments and applications field, above-mentioned specific embodiment are only schematical, directiveness, rather than restricted
's.Those skilled in the art are under the enlightenment of this specification and in the range for not departing from the claims in the present invention and being protected
In the case where, a variety of forms can also be made, these belong to the column of protection of the invention.
Claims (4)
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| CN201810577108.5A CN109030041B (en) | 2018-06-06 | 2018-06-06 | Method for measuring energy efficiency of countercurrent wet cooling towers with natural ventilation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082140A (en) * | 2019-05-06 | 2019-08-02 | 西安交通大学 | Natural draft counter-flow wet cooling tower efficiency measurement method |
| CN110346158A (en) * | 2019-05-20 | 2019-10-18 | 西安交通大学 | The quantitative measurement method of shell-and-tube heat exchanger efficiency |
| CN110376239A (en) * | 2019-05-20 | 2019-10-25 | 西安交通大学 | The quantitative measurement method of grease working medium shell-and-tube heat exchanger efficiency |
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| US4507930A (en) * | 1984-03-23 | 1985-04-02 | The Babcock & Wilcox Company | Cooling tower monitor |
| CN205483049U (en) * | 2016-01-18 | 2016-08-17 | 南京电力设备质量性能检验中心 | Natural draft cooling tower parameter measurement device |
| CN107014240A (en) * | 2017-03-03 | 2017-08-04 | 北京太阳宫燃气热电有限公司 | A kind of cooling tower cooling effectiveness monitoring method and system |
| CN107607579A (en) * | 2017-09-13 | 2018-01-19 | 山东大学 | The thermal performance on-line monitoring system and its method of a kind of wet cooling tower |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4507930A (en) * | 1984-03-23 | 1985-04-02 | The Babcock & Wilcox Company | Cooling tower monitor |
| CN205483049U (en) * | 2016-01-18 | 2016-08-17 | 南京电力设备质量性能检验中心 | Natural draft cooling tower parameter measurement device |
| CN107014240A (en) * | 2017-03-03 | 2017-08-04 | 北京太阳宫燃气热电有限公司 | A kind of cooling tower cooling effectiveness monitoring method and system |
| CN107607579A (en) * | 2017-09-13 | 2018-01-19 | 山东大学 | The thermal performance on-line monitoring system and its method of a kind of wet cooling tower |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082140A (en) * | 2019-05-06 | 2019-08-02 | 西安交通大学 | Natural draft counter-flow wet cooling tower efficiency measurement method |
| CN110082140B (en) * | 2019-05-06 | 2020-10-27 | 西安交通大学 | Quantitative measurement method for energy efficiency of natural ventilation counter-flow wet cooling tower |
| CN110346158A (en) * | 2019-05-20 | 2019-10-18 | 西安交通大学 | The quantitative measurement method of shell-and-tube heat exchanger efficiency |
| CN110376239A (en) * | 2019-05-20 | 2019-10-25 | 西安交通大学 | The quantitative measurement method of grease working medium shell-and-tube heat exchanger efficiency |
| CN110376239B (en) * | 2019-05-20 | 2021-01-15 | 西安交通大学 | Method for measuring energy efficiency ration of oil-water working medium shell-and-tube heat exchanger |
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| Publication number | Publication date |
|---|---|
| CN109030041B (en) | 2019-06-11 |
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