Clyde Lobby Windows Heat Loss Boyd Black Benjamin Hillyard Kent Fairbourn Winter 2008

Project Scope Find heat loss from windows in Clyde Building lobby Find heat loss from windows in Clyde Building lobby Determine financial loss due to heat loss Determine financial loss due to heat loss

Window Setup Double paned Double paned Dimensions: 7 ft x ft x ft Dimensions: 7 ft x ft x ft Gap thickness: ft Gap thickness: ft Window thickness: ft Window thickness: ft

Finding h

Problem Schematic

Calculated Heat Loss Assumptions: Assumptions: –No convection between panes –Gap width equal to 0.5 inches –Free convection Finding the h values: Finding the h values: –Each Nussel number was calculated to find the h value Determining the heat gain from convection Determining the heat gain from convection –Using a thermal circuit, heat transfer was calculated Determining the heat loss from convection Determining the heat loss from convection –Thermal circuit was used again to find heat transfer

Financial Burden Using a value of dollars per kWh, total cost was figured to be $ per year Using a value of dollars per kWh, total cost was figured to be $ per year National Electricity Rates