Experimental Study on Fuel Consumption and Energy Efficiency at Soymilk Cooking Using a Mini Boiler and Using a Gas Stove

This paper presents a comparison of fuel consumption and energy efficiency at soymilk cooking between using a gas stove and using a mini boiler. The experiment had been done at tofu production line at Subang. We used a tofu cooking stove that can be operated using a gas burner or using steam from a boiler. There were three experiments i.e. cook using a gas stove (A), cook using a gas boiler (B), cook using a wood pellet boiler (C). The highest of specific fuel consumption was based on cooking using a wood pellet mini boiler (0.157 kg fuel/kg tofu production) and the lowest one was cook using a gas boiler (0.047 kg fuel/kg tofu production). The highest of specific energy consumption of the soymilk cooking was cooking using a gas stove (3792 kJ/kg tofu production) and the lowest one was cook using a gas boiler (2076 kJ/kg tofu production). Soymilk cooking using a mini boiler could save the fuel cost and the cooking time compared with soymilk cooking using a gas stove, cooking using a wood pellet mini boiler was the cheapest and fastest one. The highest of energy efficiency was cooking using a gas boiler (59.24%) and the lowest one was cook using a gas stove (33.66%).