Optimization of Energy Consumption in Parallel Evaporator Refrigeration Units Using Control Algorithms
Main Article Content
Abstract
Mankind had been consuming since their existence. With the improvement of technology, the needs of mankind had increased. The increase in consumption had resulted in a reduction of energy resources. This reduction has caused energy costs to rise, thus giving energy efficiency a more important role in technology. Companies had started developing projects to improve system efficiency. Analyses on commercial refrigerators has shown that increasing and optimizing component efficiency played a very important role in reducing the system’s energy consumption. This study was conducted on a parallel cooling system with two different cabinets to determine the effects of various working conditions caused by changes in the performance of system components on energy consumption. The effects of different compressor revolution numbers and valve section opening ratios on the cooling system were investigated. The variables of system energy consumption were nondimensionalized using the Buckingham π theorem. A model was developed using the linear least squares regression algorithm to generalize the relationship between the dimensionless variables and the system’s energy consumption.
Article Details

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Licensed under a CC-BY license: https://creativecommons.org/licenses/by-nc-sa/4.0/
How to Cite
References
Ö. Ahmet, Investigation of Two Performance Improvement Options for Household Refrigerators, M.Sc. thesis, Univ. of Maryland, 2006.
E. Buckingham, "On physically similar systems: illustrations of the use of dimensional equations," Physical Review, vol. 4, no. 4, pp. 345–376, 1914.
L. Chao-Jen and S. Chin-Chia, "Characteristics of a series-connected two-evaporator refrigerating system," Applied Thermal Engineering, vol. 25, pp. 519–532, 2005.
B. Eveleyn and D. R. Francis, "Performance of a two-cycle refrigerator/freezer using HFC refrigerants," ASHRAE Transactions, vol. 105, pp. 310–318, 1999.
D. Guoliang and L. Zhili, "Temperature and time-sharing running combination control strategy of two-circuit cycle refrigerator–freezer with parallel evaporators," Applied Thermal Engineering, vol. 26, pp. 1208–1217, 2006.
D. Guoliang, Z. Chunlu, and L. Zhili, "Dynamic simulation of natural convection bypass two-circuit cycle refrigerator–freezer and its application Part I: Component models," Applied Thermal Engineering, vol. 24, pp. 1513–1524, 2004.
D. Guoliang, Z. Chunlu, and L. Zhili, "Dynamic simulation of natural convection bypass two-circuit cycle refrigerator–freezer and its application Part II: System simulation and application," Applied Thermal Engineering, vol. 24, pp. 1525–1533, 2004.
D. Gerlach and T. Newell, Dual Evaporator Household Refrigerator Performance Testing and Simulation, Air Conditioning and Refrigeration Center, CR-40, 2001.
E. S. Kevin, H. Imam, and R. Reinhard, "Independent compartment temperature control of Lorenz–Meutzner and modified Lorenz–Meutzner cycle refrigerators," ASHRAE Transactions, vol. 102, pp. 1085–1096, 1996.
S. A. Kline, Engineering Equation Solver (EES), Commercial version 7.600, 1992.
K. Kwangil, K. Bill, and R. Reinhard, "Application of tandem system to high-efficiency refrigerator/freezer," ASHRAE Transactions, vol. 101, pp. 239–1247, 1995.
V. Lubos, J. M. Lohan, and A. M. Rowley, "Optimization of temperature control during cooling in a multi-zone refrigeration system," presented at the ASHRAE International Summer Meeting, June 22–26, USA, 2002.
SPSS Inc., SigmaPlot 2001 for Windows, Version 7.0, 1983–2001.
W. Sung Ji and H. Chan-Chun, "Method for controlling of refrigerator," Patent No. WO2008120865, LG Electronics Inc., Korea, 2008