Thermal and energy evaluation of a novel polymer-ceramic composite as insulation for a household refrigerator (original) (raw)
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2016
The aim of this research was to study experimentally the thermodynamic behavior of a typical household refrigerator, by varying the vacuum insulation panel (VIP) coverage area and positioning around the cabinet. To this end, 16 samples of the same refrigerator model were constructed with distinct VIP arrangements and subjected to exhaustive reverse heat leakage) (RHL) and energy consumption tests. As expected, it was found that the energy consumption is dependent on both the coverage area and the positioning. The data gathered was analyzed statically in order to determine the most promising areas for the installation of the panels. Energy savings of 6% and 11% were observed when the panels were installed on the doors and on the rear wall, respectively. Overall, it was found that a coverage area of 56% reduces the energy consumption by 21%.
IJERT-Comparison of a Conventional Domestic Refrigerator with a PCM Encapsulated Refrigerator
International Journal of Engineering Research and Technology (IJERT), 2015
https://www.ijert.org/comparison-of-a-conventional-domestic-refrigerator-with-a-pcm-encapsulated-refrigerator https://www.ijert.org/research/comparison-of-a-conventional-domestic-refrigerator-with-a-pcm-encapsulated-refrigerator-IJERTV4IS100585.pdf Renewable energy systems have always attracted research scholars especially in past few decades due to over exploitation and large scale depletion of non-renewable energy sources. Conservation of energy resources have paved way for improving energy storage and conversion systems. The use of a latent heat storage system using phase change materials (PCMs) is an effective way of storing energy in the form of thermal energy. PCM materials have large amount of heat energy stored in them in the form of latent heat. The heat energy associated with PCM is green energy and is a natural phenomenon. The latent heat of the PCM can be utilized for various thermal energy storage applications. It possess the advantages of high-energy storage density and the isothermal nature of the storage process. Recent researches are going on about the applications of PCM in heat pumps, air conditioning and refrigeration, green house buildings, solar engineering, and spacecraft thermal control applications. This paper conducts experiment and summarizes the investigation and analysis of the thermal energy storage systems incorporating PCMs for use in refrigeration systems. The Efficiency of Refrigerator was enhanced and improvement in the quality of food is obtained. Results can be improved with different combination PCM materials or different design of PCM encapsulation which ensures more heat transfer.
Journal of Fundamentals of Renewable Energy and Applications, 2018
In this study, we describe the design, construction and the performance of an eco-friendly non-electric refrigerator. The refrigerator is made up of stainless steel (SS) chamber, drawers, four different types of insulation materials, refrigerant materials, gasket, screw, sensor etc. The refrigerant material used herein was the mixture of table salt and ice with an optimum ratio of 1:2. The refrigerant materials were preserved in a stainless steel (SS) chamber of optimal dimension covered by four successive layers of insulation materials. A refrigeration time of about fifty three hours of preliminary designed refrigerator was attained. The microbiological effects of freezing mixture on foods and food stuffs preserved into the refrigerator have also been studied. The performance of the preliminary setup is found to be promising for developing non-electric low cost refrigerator considering the raw materials used, easy fabrication procedure, temperature control mechanism and health issues. However, further studies are needed for realization of an environmental friendly novel green refrigerator powered by chemical energy from very low cost freezing mixture.
TIMBOU international journal of engineering research and technology , 2023
Environmental perception today encourages empiricism worldwide on the learning of plant or natural fiber reinforced polymer composite and cost efficient alternative to synthetic fiber reinforced composites. Replacement of exterior metallic wall of materials with lightweight materials that are low cost, environmental friendly, and high specific ermal properties in building and construction as weight of the metallic insulated panel continues to pose a challenge on external wall of materials and environment is the major focus of this study. As a follow-up to this problem statement, six composite material samples were fabricated as replacement options for metallic exterior sheet for incubator, refrigerator,air condition casing, mobile cart, and so on. The key study of this paper is to investigate the moisture absorption, density, thickness swelling, hardness and the thermal properties tendencies of these composite specimens as these properties determine thesuitability of these materials to build the external wall. Part of the methodology adopted in the manufacturing of these composites was based on banana fiber treatment with 15% NaOH, and fiber loading in the composite panel. The experimental investigation reveals that the water absorption behaviour of composites shows significant disparity increases until after 72 hours and became consistent after 96 hours up to 192 hours duration of immersion. In addition, it was observed that the thickness swelling of the composites increases as the immersion period increases until a specific value was attained at 72 hours where no defined thickness swelling occurred. It is observed that the density of composites increases with increase in fiber content with composite sample S-2 (10 wt% fiber content) which has lowest thermal properties. However, the implication of this study is that treated banana fiber reinforced waste polystyrene foam composite material could be adopted as exterior wall of mobile carts, refrigerating system body and others because of its excellent physical and very good thermal properties.
IRJET, 2020
As per world's energy scenario energy demands vary on daily, weekly and seasonal bases. The utilization of renewable energy is obvious the attraction point of many researchers now a day due to its availability. Thermal energy storage by using phase change material is one of most demanding and innovative technology for storage of energy. Refrigeration and Air Conditioning are somewhat responsible for present energy crisis. This review article focuses on methods of thermal energy storage system, integration of organic, inorganic and eutectic type of PCM in house hold refrigerator and brief summary of performance of household refrigerator with and without PCM.
Investigation of Thermal Insulation on Ice Coolers
The effective analysis of this study involves the investigation of suitable density and thickness of the materials for the best performance of low temperature thermal insulation in ice coolers. The requirement of energy conservation in ice coolers and to decrease the spoilage of food is essential nowadays. This investigative study is over the ice coolers performing with coconut fibre and polystyrene as insulation materials with different possible thermal conductivities and also about a better a choice of using polyurethane as insulator in ice coolers. In which, the optimised density and thickness of the polyurethane is analysed and the thermal conductivity is found experimentally by Lee's Disk Apparatus from all the three materials namely coconut fibre, polystyrene and polyurethane. It is found that polyurethane of density 95kg/m 3 is the best with least thermal conductivity of 0.0195 W/m K. The experimental data is compared with the numerical analysis by which the best density and thickness for the insulating material is found in order to minimize the loss of heat energy in the ice coolers and to increase the melting time of the ice in it.