MASEC Thermal-Analysis Workbook Design Heating Load and Solar Contribution: Calculation Procedures

摘要

A method is provided to determine the hourly heat loss of a building under design conditions. To accomplish this, each part of the building shell must be analyzed and its heat loss calculated. Three energy analysis worksheets are provided to help facilitate the process. The first is used to determine U-values and areas for above grade components of the building shell. Heat loss through below grade walls, below grade floors, and slabs on grade are figured on the second. Finally, transmission losses above grade, infiltration losses, and a total estimated design heating load are calculated on the third. A performance analysis technique based upon the Solar Savings Fraction calculation method is designed to provide a detailed estimate of the energy requirements per heating season of a buildng with passive solar elements. The procedure is implemented by completing three worksheets. The first summarizes thermal specifications, calculated values and heating loads. The second is used to determine the amount of solar energy that is absorbed by the building per square foot of solar glazing. The third is used to find values of the monthly Solar Savings Fraction and monthly and annual Auxiliary Heating Requirement. Also calculated are Annual Passive Solar Contribution, Passive Solar Fraction, and Thermal Integrity Factor. (ERA citation 07:029574)