Design and Analysis of Small-scale Agriculture Cold Storage: A Case Study in Magelang

The growing need for efficient post-harvest management in horticulture necessitates innovative cold storage solutions. This study designs a small-scale cold storage facility for baby beans in Magelang, Indonesia, to reduce post-harvest losses and improve distribution efficiency. Operating at 1°C to 7°C with 85%–90% relative humidity, the facility ensures optimal preservation of bean quality. With a 20-ton capacity, it utilizes advanced materials such as polyurethane insulation, stainless steel for durability, and plaster for fire resistance. Thermodynamic and psychrometric analyses determined a cooling load of 2,234,753.07 kJ/day. The refrigeration system—comprising a compressor, evaporator, condenser, and expansion valve—was optimized for consistent performance and energy efficiency. A 3D layout enhances space use and air circulation, maintaining ideal conditions to prevent chilling injuries and spoilage. This model supports smallholder farming by improving supply chain resilience and sustainability. Future research will explore phase change materials, advanced insulation, and real-time monitoring for further optimization.