טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
M.Sc Thesis
M.Sc StudentBeagon Evgeniy
SubjectEffect of Transparent Insulation and Phase Change Materials
on Thermal and Energy Performance; Feasibility
Study Applied to School and Office
Buildings in Mountain Region
DepartmentDepartment of Civil and Environmental Engineering
Supervisor Professor Rachel Becker
Full Thesis text - in Hebrew Full thesis text - Hebrew Version


Abstract

The thermal and energy effects of applying two energy saving materials, Transparent Insulation Materials (TIM) and Phase Change Materials (PCM), in typical Israeli buildings, which have already been otherwise designed to be energy efficient, were investigated. The study included two building model, schools and office buildings, representing heavyweight and lightweight construction types, respectively. The reference buildings were composed of the optimal combination of conventional energy saving means such as: orientation, window size and type of glazing, night ventilation, and lighting control. Internal thermal loads in the office building were smaller than in the school building. Analysis of the buildings’ electrical energy consumption was carried out using the simulation software Energy Plus. The main conclusions of this study were: Various applications of TIM can reduce energy consumption for winter heating, but increase it for summer cooling. Annual energy saving seems possible, however, for the following applications: replacement of the opaque part of the window wall with TIM (up to 36% in northern orientation, and up to 27% in southern orientation compared to the reference state of the building), and implementation of TIM with selective shading on the opaque part of walls (up to 12% for implementation on the south window-wall, and to 8% for implementation on the eastern or western gable wall). Application of PCM in heavyweight construction (schools buildings) did not improve energy efficiency, although it improved summer thermal comfort (by lowering surface and mean radiant temperatures during school hours). In the lightweight office building, the application of PCM on the internal surfaces of all walls saved energy and improved thermal comfort during the summer season (by maintaining a constant surface temperature when the PCM could be sufficiently discharged, and a decreased surface temperature on the other days). Energy savings of 28-52% were obtained for cooling, resulting in overall annual energy savings of 18-27% (depending on orientation of the room). The combination of selectively shaded TIM with PCM in southern classrooms reduce the overall energy up to 16% of the reference state consumption, in comparison to 12% without the PCM.