流下液膜を用いた蒸気と不凝縮ガスの冷却について

抄録

Since non-condensable gas is contained in the steam at geothermal power plant, it is required for the purpose of simplifying a gas discharge system for plant efficiency improvement that emission gas should be made to fully cool and a volume flow should be made small. It is common to adopt how to cool the gas by direct contact for geothermal energy. We researched the cooling capability by the direct contact with the falling liquid film using structured packing. Experimental apparatus (Figure1) mainly consists of an evaporator, a cooling unit, and a vacuum pump. In the cooling section at the test equipment, Mixed gas(steam and air) and cooling water were floated by opposed flow : Mixed gas flows upward, and steam flows downward. Our conclusion in the experiment is that the cooling capability of falling liquid film has sufficient capability to cool mixed gas with high non-condensable gas density to cooling water temperture.