Design Method for the Heating/Cooling Coil in the AHU Based on Fuzzy Logic—Part Two: Design of the Minimum Heat-Exchanging Unit

摘要

Considering a heating/cooling coil with adjustable heat-exchange area, an unequal type is put forward in this paper. Aiming at the application of such heat exchanger in an air-handling unit, restriction conditions are given for the minimum heat-exchanging unit in accordance with the requirement of control precision of indoor temperature and humidity. The structure adjustable heat exchanger improved the hydraulic adjusting characteristics of existing air handling units in the respective structure, and overcame the problems of existing air-handling units such as a narrow hydraulic adjusting range due to the rapid-opening performance of the continuous motor-driven value. As a result, such kind of heat exchanger is extremely suitable to fuzzy control.