Perancangan Air Heater Berbahan Bakar LPG Untuk Lemari Pengering Pakan Ternak Kapasitas 10 kg

The design of animal feed drying systems is essential to maintain nutritional quality and extend product shelf life. This study aims to design an LPG-fueled air heater for use in a 10 kg capacity cabinet dryer. The research method includes literature review, conceptual design, thermal calculations, material selection, and design development. The air heater system was designed in a shell-and-tube configuration with 1 shell pass and 3 tube passes, using a total of 12 pipes with a diameter of 25.4 mm and a thickness of 2 mm. The calculation results indicate that, to achieve an air temperature increase from 30 °C to 70 °C with hot gas input at 300 °C, a tube length of approximately 166 mm is required. Stainless steel was selected as the primary material due to its resistance to heat and corrosion. The design provides a heating system with more uniform temperature distribution, relatively efficient energy consumption, and practical applicability for small-scale livestock farming. Therefore, the LPG-fueled air heater design can serve as an effective and economical drying technology alternative to support feed security.