Abstract
A micro-cogeneration system was designed and constructed using a 6.5kWe Yanmar diesel generator as prime mover fuelled with raw vegetable oils preheated to 60°C and 90°C. The system was run under single generation (SG) and cogeneration (CG) modes, and gas oil was used for comparison purpose. The system performance was studied in terms of energy consumption, exhaust gas temperature, recovered waste heat, efficiency and CO2emission. Under CG mode, it performed with over 2.5 times higher efficiency and 60% lower CO2emission compared to that of SG mode. Higher preheating temperature was proved posed positive effect to the system, and the performance of the preheat vegetable oils was comparable to that of the gas oil.
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