Abstract
This paper presents the results of heat transfer performance of pool boiling type and falling film type heat exchangers and operation test about newly developed solar absorption chiller using the two types of new heat exchangers. It is well known that solar thermal energy has two advantages: largest volume of energy in renewable energy resources and high energy conversion efficiency. Solar cooling system utilizing solar thermal energy as energy sources is attracting attention as saving energy because industrial and commercial air conditioning occupies high energy consumption compared to other energy application. In order to utilize solar thermal energy for industrial and commercial air conditioning application effectively, we Kawasaki Thermal Engineering produced prototypes of two types of new heat exchangers: pool boiling type and falling film type, and evaluated the heat transfer performance for the two types. As a result, the utilization of about 75 degrees C hot water, which was hard to achieve in conventional absorption chillers for its relatively low temperature, succeeded using the newly developed falling film type heat exchanger.
