22 September 2011
It is popular to use direct combustion to generate heat or steam for a heating coil and a steam humidifier in an air makeup unit for a painting booth. However, using the combination of a heat pump and an evaporative humidifier instead of using the combination of a boiler and a steam humidifier can contribute to mitigate CO2 emission. It was announced
on the 1st report about the effectiveness of CO2 emission reduction by an air makeup unit
with the heat pumps and evaporative humidifiers on the 9th IEA Heat Pump Conference in Zurich, 2008. A new painting booth of supply airflow volume of around 30,000m3/h with heat
pumps and evaporative humidifiers in an air makeup unit, was constructed in Kanto area by a leading automobile parts manufacturer. In this report, the effectiveness of CO2 emission
reduction by the air conditioning system installed is evaluated, comparing with CO2 emission by an assumed air conditioning system using the combination of a boiler and a steam
humidifier. Also, the coefficient of performance (COP) of the heat pump is evaluated.