A Method of Self-Adaptive Controlling Temperature Fluctuation of Display Cabinet in Dynamic Ice-Storage System

Abstract:

Dynamic ice storage system has advantages of energy-saving by using electricity price difference of the different period. Food in display cabinet requires small temperature fluctuation to prolong preservation time. Considering the questions of energy consumption and unable to adopt the traditional method of halting and running compressor to control center temperature fluctuation in display cabinet, the paper provides dynamic ice storage system to cool display cabinet. When the wind speed keeps in suitable space, according to environment temperature, humidity and wind change, self-adaptive adjusting cooling water pump flow can maintain the center temperature within a certain range, and reduce center temperature fluctuations in display cabinet by controlling inverter frequency using PLC. Experiments prove that when environment temperature change range is 20°C to 32°C, and relative humidity is 40% to 90%, if not adopting PLC control pump flow, the temperature difference is 2.5°C, on the contrary, temperature difference is 1.3°C.

• Periodical: Key Engineering Materials (Volumes 474-476)
• Pages: 96-101
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.474-476.96
• Online since: April 2011
• Authors: Wei Hua Guan, Li Fu Li, Yong Man Lin
• Keywords: Dynamic Ice-Storage System, Refrigerated Display Cabinet, Self Adaptive, Temperature Fluctuation

References

[1] Chandrasekharan Ramesh, Bullard Clark. Design tool for display case evaporators. ASHRAE, 2005, 16(1), pp.1071-82.

[2] Chen Yunguang．Yuan Xiuling．Simulation of acavity insulated by a vertical single-band cold air cur-tain. Energy Conversion＆Management，2005·46(1 1/12): pp.1745-1756.

DOI: 10.1016/j.enconman.2004.09.002

[3] Yu kezhi, Ding guoliang, and Chen tianji. Research Status and Analysis of Display Cases, Refrigeration Air Conditioning & Electric Power Machinery, 2004, 25(1): pp.8-12.

[4] Yu kezhi, Ding guoliang, and Chen tianji. Energy Saving Strategy in a Vertical Display Cabinet with Central Air Supply, ENERGY CONSERVATION TECHNOLOGY, 2010. 28(2) : pp.130-133.

[5] Chen Tianji, Yu Jile, Xie Kun. Study on reducing the energy consumption of display cabinet refrigeration system using electronic expansion valve, cryogenics and Superconductivity，2008. 36 (7) : pp.39-43.

[6] Zhang Wen-hui, Gong Yi, and Lu Yan-li. Effect of Pre-cooler on food Temperature in Display Cabinet. FLUID MACHINERY. 2008. 36(10): pp.67-69.

[7] Zhang Wenhui, Gong Yi, and Lu Yanli. Effect of Ambient Temperature and Huxidity on Performance of Pre-cooler in Display Cabinet, Journal of Refrigeration, 2008 29(6) : pp.57-60.

[8] Xie Kun, Chen Tianji, and Yu Kezhi. Experimental Investigation on Effect of Ambient Temperature and Relative Humidity on Performance of Refrigerated Display Cabinet, Journal of Refrigeration, 2007 28(2): pp.19-22.

[9] Chen Qin-yi. Experiment study of different temperature range and temperature fluctuations during storage on chemical quality [D], Shanghai Ocean University. (2008).

[10] Ma Chunhong, based on dynamic ice cold storage experimental study on a vertical open display cabinet with central refrigeration [D]. Graduate University of Chinese Academy of Sciences. 2009. Project source item: National Natural Science Foundation of China (Grant number: U0634005)；Key areas breakthrough projects of Guangdong-HK(No: 2009A011603005 )；Key Project of Science and Technology Planning of Guangdong Province (No. 2009A080305002).

DOI: 10.5697/oc.55-1.269