Department of Pure and Applied Physics, University of Kota, Kota, Rajasthan, India.
Environ Sci Pollut Res Int. 2022 Jul;29(34):51153-51160. doi: 10.1007/s11356-022-19052-x. Epub 2022 Feb 10.
The paper presents the design, development and investigative studies into the use of a solar hot case/food warmer. The solar hot case can prove to be highly useful to the persons who carry hot food to their workplaces for lunch and eat it 4-5 h later. It can help keep food warm and infection free, by maintaining the food at an elevated temperature. The solar hot case has been developed with a total aperture area of 0.673 m. The energy requirements for food warming have been calculated and found to be around 62 kJ in summer and 90 kJ in winter for an average lunch box of mass 0.25 kg containing 0.4 kg of food. The design of the solar hot case has been prepared on the basis of the food warming calculations to allow around ten lunch boxes to be warmed simultaneously. A computer program based on the solar radiation geometry and an ASHRAE model has been prepared to study the energy available in various months and to estimate the solar energy interception by the solar hot case. The results show that the energy absorbed by the system at an instant varies from around 300 to 1400 kJ/mh in winter and 1000-2000 kJ/mh in summer. Experimental in-field observations related to the temperature profiles of the developed system are also reported.
本文介绍了一种太阳能热盒/食品保温箱的设计、开发和应用研究。对于那些需要携带热食去上班并在 4-5 小时后食用的人来说，太阳能热盒非常有用。它可以通过保持食物在较高温度下，来帮助保持食物的温暖和免受感染。太阳能热盒的总开口面积为 0.673 平方米。已经计算出食物加热所需的能量，夏季平均每盒 0.25 公斤、含 0.4 公斤食物的午餐盒需要 62 千焦，冬季则需要 90 千焦。太阳能热盒的设计是根据食物加热计算来进行的，以便可以同时加热十个左右的午餐盒。还编写了一个基于太阳辐射几何形状和美国采暖、制冷与空调工程师学会（ASHRAE）模型的计算机程序，以研究不同月份的可用能量，并估计太阳能热盒对太阳能的拦截。结果表明，系统在瞬间吸收的能量在冬季约为 300 至 1400 千焦/平方米小时，夏季约为 1000 至 2000 千焦/平方米小时。还报告了与所开发系统的温度分布相关的现场实验观测结果。
