Literature survey and a universal evaporation correlation for plate type heat exchangers

Ayub, Zahid H.; Khan, Tariq S.; Salam, Saqib; Nawaz, Kashif; Ayub, Adnan H.; Khan, M. Adam

doi:10.1016/j.ijrefrig.2018.09.008

Cited by 29 publications

(10 citation statements)

References 37 publications

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“…At the same time, two of the considered correlations, Kandlikar [16] and Ayub [12], gave results close to the ±30% error band, with MAE values of 43.89% and 37.29%, respectively.…”

Section: Discussionmentioning

confidence: 58%

“…A theoretical and experimental study was developed under the following operating conditions: ammonia mass flow rate within the range 0.0227-0.0387 kg/s; condensing temperature of 25 • C; evaporating temperature between −10 and −1.5 • C; and cooling brine temperature between 4.1 and 6.4 • C. The best predictions in terms of ammonia boiling heat transfer coefficient experimental value were made by applying Shah and Jokar correlations having an MAE of 14.23% and 17.7%, respectively. The other ten correlations analyzed, namely Khan [2], Sterner and Sunden [3], Arima [4], Almalfi [5], Huang [11], Ayub [12], Kandlikar [16], Koyama [26], Danilova [27], and Sterner and Taborek [28], lead to unacceptably large deviations compared to the experimental values, under the specified conditions related to the system operating conditions. The novelty of our study focused on the following main ideas: − To date, ammonia boiling in PHE has been less approached in Romania.…”

Section: Discussionmentioning

confidence: 99%

“…Recently, in 2018, Ayub Z. et al [12] made a literature review on evaporation correlations for plate type heat exchangers. Even though the literature provides an important database for correlations related to two-phase flow of ammonia in PHE, most of the studies are valid and applicable to a limited range of values.…”

Section: Review Of Significant Research In the Fieldmentioning

confidence: 99%

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Investigation on the Ammonia Boiling Heat Transfer Coefficient in Plate Heat Exchangers

et al. 2022

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This investigation aims to compare the experimental and theoretical ammonia boiling heat transfer coefficient in a plate heat exchanger (PHE). Measured data were gathered during functioning of a single stage vapor mechanical compression refrigeration system placed in the Thermal Systems Research Center of the Technical University of Civil Buildings Bucharest (TUCEB). Experimental values fall within the range of 1377 ÷ 3050 W/m2K. Theoretical values were obtained from 12 correlations confirmed by the literature to date, developed for similar working conditions. The experimental values are close to the theoretical ones for Shah and Jokar correlations applied for a vapor quality of 0.5. The theoretical values are in the range of 1440 ÷ 2076 W/m2K and 1558 ÷ 2318 W/m2K, respectively. Shah correlation predicted 82.35% of all data within the ±30% error band at an MAE value of 14.23%, and Jokar et al. predicted 76.47% of all data within the ±30% error band with an MAE value of 17.7%.

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“…At the same time, two of the considered correlations, Kandlikar [16] and Ayub [12], gave results close to the ±30% error band, with MAE values of 43.89% and 37.29%, respectively.…”

Section: Discussionmentioning

confidence: 58%

Section: Discussionmentioning

confidence: 99%

Section: Review Of Significant Research In the Fieldmentioning

confidence: 99%

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Investigation on the Ammonia Boiling Heat Transfer Coefficient in Plate Heat Exchangers

et al. 2022

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“…Such isolation does not allow to fully assess the efficiency of heat utilization of urban facilities, since [19] this assessment should take into account the heating scheme as a whole, including all three levels: the source (a CHPP), transportation (heat networks) and consumers (non-energy facilities). Hence, the final calculation, which makes it possible to fully assess the efficiency of using the waste heat of urban facilities with the help of the HP unit for heating purposes, is a return calculation [20,21]. As noted above, the calculations carried out do not take into account changes in the initial parameters of the calculation of the heating network and the CHPP.…”

Section: Fig 8 Return Calculation Schemementioning

confidence: 99%

Efficiency of use of waste heat energy on the example of Chelyabinsk

Tseyzer¹,

Ptashkina-Girina²,

Guseva³

2019

E3S Web Conf.

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We consider the possibility of improving the existing heat-suppling system in Chelyabinsk through the introduction of heat pump technology for the disposal of waste low-grade heat. Sources of information concerning the ways of utilization of waste thermal energy, the principles of work of heat pumps, classification of city sources of waste heat are analyzed. The technique directed to assess the effectiveness of applying heat pumps for each category of city sources of waste thermal energy is designed. The calculated assessment showed that the utilization of waste heat in the conditions of Chelyabinsk will reduce the annual energy of fuel consumption by 2.2 million tons of conventional fuel (24.9%). At the same time, thermal pollution will decrease by 1.5 million tons of equivalent fuel. This effect is possible with the use of heat pumps with a total heat output of 1,145 MW.

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“…Plate heat exchangers (PHEs)which have an advantage in acquiring larger heat transfer per volume are highly applicable in industrial applications such as refrigeration, heating, cooling, chemical processing, etc [1]- [4]. Additionally, PHEs have benefits in reducing refrigerant charge and lighter structural supports [5], [6]. The structural construction of the PHEs basically consist of a series of thin, rectangular, pressed steel plates which are stacked and pressed together such that several channels are formed between the plates [7], [8].…”

Section: Introductionmentioning

confidence: 99%

Consideration on Local Heat Transfer Measurement of Plate Heat Exchanger with the Aid of Simulation

Tun

Kariya

Miyara

2020

EPI-IJE

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Abstract In this study, the local heat transfer coefficient of boiling and condensation were obtained by an experimental set up using vertical stainless-steel type brazed plate heat exchanger. A series of 8 vertical brazed plates are used as the major components of the test section of experimental set up and are fabricated into layers so that flow channels are formed between the plates through which water and refrigerants are flowing through. The experiments are carried out at the mass flux of 10, 20 and 50 kg/(m2s). In order to measure the local heat transfer coefficient, flat stainless-steel plates of 10 mm in thickness are installed attached to the vertical plates onto which the thermocouples are positioned to measure the temperature distributions at the surface of the plates. By performing the experiment, the direction of the heat flux across the plate tends to deviate downward especially at the lower part of the plate due to the non-uniform temperature distributions across the plate. The results are analyzed and validated at the mass flux of 10 kg/(m2s) by the aid of the simulation tool by using ANSYS FLUENT 19.1 to estimate the local heat transfer coefficient and the heat flux across the plate. The analysis result shows that the simulation model can assist to track the deviation of the direction of the heat flow from the horizontal direction across the plate and the experimental results of the local heat transfer coefficient have similar trends with that of the simulation results.

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Literature survey and a universal evaporation correlation for plate type heat exchangers

Cited by 29 publications

References 37 publications

Investigation on the Ammonia Boiling Heat Transfer Coefficient in Plate Heat Exchangers

Investigation on the Ammonia Boiling Heat Transfer Coefficient in Plate Heat Exchangers

Efficiency of use of waste heat energy on the example of Chelyabinsk

Consideration on Local Heat Transfer Measurement of Plate Heat Exchanger with the Aid of Simulation

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