Experimentation on Air Leakage Characteristics and Key Paremeters Analysis of Refrigerated Transport Unit

Journal article


Liu, G, Xie, R, Foster, A, Ruigui, Q and Li, J (2016). Experimentation on Air Leakage Characteristics and Key Paremeters Analysis of Refrigerated Transport Unit. Transactions of the Chinese Society for Agricultural Machinery. 10 (47).
AuthorsLiu, G, Xie, R, Foster, A, Ruigui, Q and Li, J
Abstract

At present,the test index of airleakage is not uniform in different standards in China. Constant pressure difference method and tracer gas concentration decay method were used to test air tightness characteristic of refrigerated transport unit.The variations of airleakage were tested under conditions of different pressures(50Pa,100Pa,150Pa,200Paand250Pa),different velocities (20km/h,40km/h,60km/h,80km/h and 100km/h)and different agings(0,71000km,126000km and175000km).The matching rela-tionship between different parameters
was analyzed.The research gave determined method of airleakage characteristic curve with experimentation and empirical formula. Thetest method was recommended in practical application.It showed that the leakage rate was influenced by airtightness and velocity,and the influence of aging was great.There was a maximum of 20times difference of airleakage index in GB29753,GB/T5600andGB/T7392.Test pressures of50Pa, 100Paand250Pa were corresponded to velocities of 30~40km/h,45~60km/hand70~100km/h. And the airleakage was about 1∶2∶4 under the conditions of above constant pressure difference.After driving 100000kmand200000km,the airleakage of refrigerated transport unit was increased by 40% and 110% under 250Pa pressure difference.Combined with the actual situation,it was suggested that 250Pa as the uniform constant pressure difference condition for air leakage test standard,and a system should be established to regularly check the thermal performance of refrigerated transport unit.In addition,the air leakage of refrigerated transport unit was influenced by internal partition form,goods stacking form,temperature,etc.A comprehensive and thorough analysis was neededin the later research.

Year2016
JournalTransactions of the Chinese Society for Agricultural Machinery
Journal citation10 (47)
PublisherLondon South Bank University
Publication dates
Print31 Oct 2016
Publication process dates
Deposited23 May 2017
Accepted01 Oct 2016
Accepted author manuscript
License
CC BY 4.0
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https://openresearch.lsbu.ac.uk/item/871w1

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