Efficiency of building related pump and fan operation - Application and system solutions

Abstract: The electric energy use in Swedish non-residential building is 71 TWh per year of which 30 TWh per year is used for the technical operation. A significant part of those 30 TWh is used for pump and fan operation. The Swedish parliament decided in 2009 on a national energy and climate plan. Year 2050 the energy use in the Swedish building stock must be halved compared to the year of 1995. The objective of this thesis is to find means to reduce pump and fan energy in non-industrial buildings. The aim is to find systems and components that can provide energy reduction in pump and fan systems by 50 %. In the thesis the current situation in non-industrial buildings regarding pump and fan systems has been described and the energy saving potentials both on component and on system level has been indentified and discussed. Further the possibility of decentralized pump and fan systems has been examined. The calculated saving potential for pump and fan operation in non-industrial buildings when improving pump efficiency and specific fan power to state-of-the-art efficiency and recommended SFP values is 50 % and 40 % respectively. Systems changes can give additional energy saving in pump and fan operation. A decentralized pump system has been implemented in real life and results show a reduction of pump energy of 70 %.