Utilizing of KNO3, KCl, and NaCl as phase change materials within the refrigerator for energy saving
Sami Samir, Mahmoud Salem, A. S. A. Mohamed, Ahmed Askalany
TL;DR
This study tested KNO3, KCl, and NaCl as phase change materials in a refrigerator to reduce energy use and improve performance in hot weather.
Contribution
The study introduces a practical application of KNO3, KCl, and NaCl mixtures as effective phase change materials in refrigeration systems.
Findings
A 1 L KNO3 mixture improved COP by 12.1% and reduced electricity use by 8.6%.
PCM materials reduced compressor operating periods by up to 7.1%.
KNO3 outperformed KCl and NaCl, with H2O being the least effective.
Abstract
Practical experiments were conducted on a home refrigerator with a capacity of 289 L, under hot weather conditions, to improve energy consumption and coefficient of Performance (COP) using several phase change materials (PCMs). A comparison was made between different materials (KNO3, KCl, and NaCl) at a mixture ratio of 10% with 90% H2O, and using H2O. A stainless-steel container with volumes of 1 L and 1.5 L was placed under the evaporator, without sacrificing any space for freezing or cooling. PCM materials have demonstrated their effectiveness in minimizing temperature variations within a refrigeration environment. The results indicate that using a 1 L KNO3 mixture achieved the most significant improvement, increasing COP by 12.1% and reducing electricity consumption by 8.6%. The KCl mixture came in second place, followed by NaCl, while the least effective was H2O. All results showed…
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Taxonomy
TopicsPhase Change Materials Research · Refrigeration and Air Conditioning Technologies · Adsorption and Cooling Systems