This paper is a comprehensive report about the research of high efficient energy-saving ammonia air cooler. In the paper

it is introduced that the test of two-side long V-groove finned pipes which are fit for the evaporators of ammonia air coolers

optimum experiments of the finned pipes

and field experiments of contrasting the model machine with the old one in a cold storage. The result shows that the air-side heat transfer performance coefficient and the overall heat transfer performance coefficient of the two-side optimum long V-groove finned pipes are higher from 18.25% and 12.85% than those of conven tional rectangular plain-plate finned pipes respectively. At last

it is introduced the structure design of the high efficient energy-saving air cooler. Used by a few of units

it is proved that this type of air cooler has characteristics of compact structure

less floor area occupied

high heat transfer efficiency

convenient maintenance and management

and is of notable economical effect.