Analysis of electric power consumption by the heat pump used in the spray booth

Abstract

The paint shop is one of the most energy-consuming locations in the cars production process. The highest energy consumption in paint shops is related to heating the exchanged air. Currently, recuperators are used to recover waste heat in paint booths. The values of the temperature change coefficient in the recuperators are so low that the temperature of the air discharged into the atmosphere behind the recuperators is still positive. This happens even for negative outside air temperatures. There are solutions for installing heat pumps for spray booths used for heat recovery or dehumidification. The paper presents a quick method of assessment of electric power consumed by heat pump working in spray booth. The proposed method enables preliminary estimation of electric power consumption by the heat pump and further estimation of the energy efficiency of the entire spray booth. It is based on a simplified model containing an equation averaging the energy efficiency of air heat pumps.