Application of cooling water to reheating link of constant temperature and humidity air conditioning systems

When the room temperature control accuracy is less than 1.0 ℃, the process air conditioning system mostly adopts electric heater for reheating. In order to save a large amount of reheat energy consumed by constant temperature and humidity air conditioning, it is proposed to use the primary reheat of cooling water to provide basic reheat, and the secondary reheat of electricity to control the temperature and humidity accuracy of air supply. Taking the constant temperature and humidity exhibition area of a museum in Shanghai as an example, the results show that compared with the conventional primary return air reheat system, the energy saving of the system is 62%, the power of the electric heater is reduced by 84%, and the energy saving effect is remarkable.