Downloads: 1 | Views: 102 | Weekly Hits: ⮙1 | Monthly Hits: ⮙1
Analysis Study Research Paper | Mechanical Engineering | India | Volume 12 Issue 6, June 2023
Theoretical Analysis and Thermal Design of Solar Cooking Unit with NaNO3+KNO3 Phase Change Material
Dr. Krishna Shrivastava
Abstract: The increasing levels of greenhouse gases and the scarcity of fossil fuels are the primary driving forces behind the utilization of conventional energy resources. Among the various conventional resources available worldwide, solar energy emerges as a promising source. It is abundantly present in nature and completely free from pollution. Solar cooking, both for household and commercial purposes, offers numerous benefits. This study focuses on the theoretical analysis and thermal design of a solar cooking system using a kitchen box, also known as a solar cooking unit. The design considerations were made for cooking two meals, including rice, pulses, and vegetables. This required 50 kg of phase change material (PCM) salt, along with three solar parabolic reflectors, to harness the required 5.4MJ of solar energy. To transfer the heat energy from the storage tank to the kitchen box, the study suggests using Thermia b heat transfer oil. As an efficient PCM salt, a mixture of NaNO3 and KNO3 eutectic is recommended. This salt mixture stores latent heat energy at a temperature of 222?C, with the potential to reach temperatures as high as 350?C, enabling efficient energy utilization. The estimated cost saving for cooking food for four persons by conventional means is Rs.360 per month, while the approximate cost of the solar cooking unit (SCU) is Rs.20, 000. Furthermore, the incorporation of a kitchen box ensures continuous cooking in the kitchen, providing convenience to users throughout the day and night. Solar cooking systems offer numerous advantages and have the potential to gain popularity, contributing to a sustainable and energy - efficient future.
Keywords: solar cooking, phase change material, heat storage tank, Renewable energy, Solar energy, Solar cooker, Socio - economic analysis
Edition: Volume 12 Issue 6, June 2023,
Pages: 1198 - 1203