Cold chain industry has a vast potential for waste heat recovery. It is a matter of importance for energy efficiency point of view, as global energy demand is increasing day by day. Ample amount of low-grade energy is either unutilized or underutilized. The heat rejected by a Heat pump or refrigeration system emerged as a promising solution for dehydration by utilizing low-grade waste heat despite higher investment. As compared to solar drying technology, heat pump drying evolved as a reliable method regarding better process control, energy efficiency, and quality of the product to be dried. Energy utilized through the refrigeration system’s waste/exhaust heat recovery in combination with or without renewable energy source enhances the overall efficiency of the system and also reduces the cost. This useful review investigated and compared the research findings of waste heat utilization through heat pump and from condenser of refrigeration system on laboratory, pilot as well as industrial scale for drying of various fruits, vegetables, and agro products. Various drying parameters like drying rate, moisture content, Specific Moisture Extraction Rate (SMER), Coefficient of Performance (COP), Exergy efficiency, and temperature as well as humidity conditions inside the drying chamber were also reviewed to promote the technological advancement of energy utilization by commercial cold storage waste heat recovery.

冷链行业在余热回收方面具有巨大潜力。对于能源效率而言，这是一个重要的问题，因为全球能源需求正在日益增加。大量未利用或未充分利用的低品位能源。尽管投资增加，但通过利用低品位废热，由热泵或制冷系统排出的热量成为脱水的有希望的解决方案。与太阳能干燥技术相比，热泵干燥是一种可靠的方法，它具有更好的过程控制，能效和待干燥产品的质量。通过制冷系统废热/废热的回收利用的能量，结合或不结合可再生能源，均可提高系统的整体效率，并降低成本。这篇有用的评论调查和比较了通过热泵和制冷系统冷凝器在实验室，中试以及工业规模用于干燥各种水果，蔬菜和农产品的废热利用的研究结果。还审查了干燥速率，水分含量，比湿提取速率（SMER），性能系数（COP），火用效率，干燥室内的温度以及湿度条件等各种干燥参数，以促进能源利用的技术进步。通过商业冷库余热回收。