Session D: Co-products/Animal Feed 2. Energy Related Aspects for Fuel Ethanol Production

In this paper, various ways for improving the thermal performance of heat pipe solar water heaters were provided based on the heat transfer analysis and have been improved by experiments and practical use. It is shown that the increase of the heat transfer space of heat pipe condensation section is the effective way to improve the instantaneous efficiency of heat pipe solar water heater, and the increase of L/D ratio of heat pipe is also important for improving its whole day performance.