Using coatings to reduce energy consumption in pumps and ventilators

Erik Gudbjerg, Lokalenergi, Denmark
Hans Andersen, Danish Technological Institute

Keywords

pumps, ventilator, energy efficiency, coating, reduced maintenance cost, energy consumption, extended lifetime

Abstract

This paper presents the results of research projects and information gathered in the field concerning energy consumption and the coatings applied to ventilators and pumps in Denmark. Project participants include pump and ventilator suppliers, suppliers of coating materials, the Danish Technological Institute as well a host of companies who have participated in field tests. Danish industrial companies use coating for maintenance reasons. In recent years companies have also recognized that coatings can improve the energy efficiency of pumps and ventilators. This reduction of energy consumption is a direct result of the coating process. The application of different types of coating material, affects efficiency to varying degrees. This paper shows that there is the potential for savings, especially with respect to electricity consumption and maintenance costs.

At the present time there exist no guidelines in Denmark with respect to coating material choice in relation to energy efficiency and application lifetime. This study is based on an analysis of the relevant literature, a series of laboratory tests with different types of coating and operation situations, and on site field tests which include measurements taken before and after coating.

This study has been able to document energy efficiency increases of up to 20 % for pump use, plus a significant extension of pump lifetime.

An increase in the energy efficiency of ventilators of up to 4 % has been documented. Ventilator lifetime can also be increased and maintenance costs reduced when the correct coatings are applied. The reduced risk for the building up of material on the wheel and inside the housing of the ventilator should also be factored in. This can be very important if the application is a transport ventilator.