Why do ENPI PEC systems use Electric reheaters?
Ans. When temperature conditions are achieved and Relative humidity (RH) has to be achieved, the A/c system goes on to a dehumidification cycle. During de humidification cycle (De-hum) if any of the electronic equipment is switched OFF or dehumidification cycle is called for at night, when the load on the A/c is partial, along with dehumidification there will be a drop in temperature. Since temperature is to be controlled within ± 1°C and RH is dependent on temperature, the heater will come ON to compensate for the sensible heat loss in the room so that the temperature is maintained during dehumidification cycle. Therefore ENPI A/c used heaters only for Sensible Heat Compensation. ENPI used Electric reheat for sensible heat compensation only. The heater will come ON only if the load goes down to 30% of the design load i.e. of the load in the Telephone exchange goes below 9.0 TR where 30TR working + 10TR standby system is installed. This situation will never occur in places like Mumbai
