A study on indoor air temperature by cool and green roofs | |
| Author | Singh, Ojash Man |
| Call Number | AIT Thesis no.ET-15-12 |
| Subject(s) | Building--Energy conservation--Tropics Roofs Roofs--Thermal properties |
| Note | A thesis report submitted in partial fulfillment of the requirements for the degree of Master of Science in Energy |
| Publisher | Asian Institute of Technology |
| Abstract | With half of the present population of the world residing in urban areas and the number expected to grow in the future with population increase, the demand for living space is going up year by year. To accommodate the growing urban population constructions are on the rise leading to densification of the urban built up environment, thermal discomfort and high energy use for air conditioning. By utilizing the dead space these buildings present, green roofs provide an option to address these urban challenges. The objective of this study is to investigate the temperature and energy consumption reduction from green and cool roof application on poorly insulated old buildings. The Experimental Room in Energy Park in AIT was used as the case example. For the experimental study of green roof and cool roof application, temperature profiles of the roof and heat flux were considered. The results of the study show good temperature reduction with green and cool roof over bare roof. The heat flux during daytime is significantly reduced with green and cool roof application as well as the heat loss is minimized. The green roof shows similar temperature reduction potential to that of the high albedo cool roof whereas the indoor temperature is lower by 1°C during daytime for green roof. The sampled building was modeled using BESim software with bare, cool and green roof for the mean days of the year 2014 to assess the temperature reduction potential and energy consumption reduction on a wider time frame. The results show cool and green roofs have lower indoor temperature and they act as good insulators preventing heat gain and loss. Though the reductions in temperature, energy consumption and electricity bill were slightly higher for green roof compared to that of cool roof, the high initial investment and longer pay back period for green roof proved to be the main deterrent for application over cool roof. |
| Year | 2015 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Energy Technology (ET) |
| Chairperson(s) | Kumar, Sivanappan; |
| Examination Committee(s) | Mohanty, Brahmanand;Salam, Abdul P.; |
| Scholarship Donor(s) | Asian Institute of Technology Fellowship; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2015 |