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Abstract: This paper investigates thermal performance of an existing eco-friendly and low embodied energy vault roof passive house (or mud-house) located at Solar Energy Park of IIT Delhi, New Delhi (India). Based on embodied energy analysis, the energy payback time for the mud-house was determined as 18 years. The embodied energy per unit floor area of R.C.C. building (3702.3MJ/m2) is quiet high as compared to the mud-house (2298.8MJ/m2). The mud-house has three rooms with inverted U-shape roof and remaining three rooms with dome shape roof. A thermal model of the house consisting of six interconnected rooms was developed based on energy balance equations which were solved by using fourth order Runge Kutta numerical method. The predicted six room air temperatures were found in good agreement with the experimental observed data on hourly basis in each month for one year. The annual heating and cooling energy saving potential of the mud-house was determined as 1481 kWh/year and 1813kWh/year respectively for New Delhi composite climate. The total mitigation of CO2 emissions due to both heating and cooling energy saving potential was determined as 5.2 metric tons/year. The annual carbon credit potential of mud-house was determined as € 52/year. Similar results were obtained for the different climatic locations in India. [Copyright &y& Elsevier]

This paper presents an analysis of energy payback time and life-cycle conversion efficiency earning by solar energy park (SEP) at I.I.T Delhi, New Delhi, India. There are a number of hybrid photovoltaic thermal (PV/T) systems with stand-alone photovoltaic (SAPV) power supply in the SEP. The analysis is based on experimental and theoretical annual performance of each system. Life-cycle conversion efficiency analysis considering the embodied energy of various systems in the park has been performed for life cycles of 30, 40 and 50 years. It is found that the cost of power generated by the SAPV system decreases with increase in the life cycle of the system. The energy payback time of the park is 2.52 years and 17.21 years for thermal and electrical energies. The return on capital decreases marginally with increase in life cycle, however it increases marginally if embodied energy is taken into account. [ABSTRACT FROM PUBLISHER]

Information about several papers discussed at the International Conference on Mesoscale Processes in Atmosphere, Ocean and Environmental Systems, held at the Centre for Atmospheric Sciences of the Indian Institute of Technology (IIT), Delhi, India is presented. Topics included high resolution mesoscale models, special computation techniques, land-ocean-atmosphere processes and satellite observations. The participants included professors, T. Krishnamurti, R. Narsimha, and J.C.R. Hunt.