Renewable energy integration with building energy systems : a modelling approach / edited by V.S.K.V. Harish, Department of Electrical Engineering, Netaji Subhas University of Technology, New Delhi, India, Amit Vilas Sant, Department of Electrical Engineering, School of Technology, Pandit Deendayal Petroleum University, Gandhinagar, India, Arun Kumar, Department of Hydro and Renewable Energy, Indian Institute of Technology Roorkee, Roorkee, India.