Heating and Cooling Load Calculations by P. G. Down, N. S. Billington and E. Ower (Auth.) PDF

By P. G. Down, N. S. Billington and E. Ower (Auth.)

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8. DESIGN EXAMPLES Most of the design examples are based on the building plan and details set out in Plans A, B and Section C. 1. h. en enNO©NO^Hf»en©r^ *-i *—i CN CN en ^ Tt- '-H ά 4 ri ^-!. h. The data can be grouped into quadrants according to the orientation of the building. Each quadrant will include three columns of 30° band figures and the division may thus be made to within 15°. "Light winds" (0-3 knots) are not divided into direction bands, but these are not important in the calculation of surface resistances.

5. GRIFFITHS, E. and DAVIS, A. , Transmission of Heat by Radiation and Convection, Food Investigation Board, Special Report 9, 1922. 6. PRATT, A. W. and BALL, E. , The thermal resistance of airspaces in building structures, /. Inst. Heat. Vent. , Vol. 34, p. 133. 7. BILLINGTON, N. , Thermal Properties of Buildings, Cleaver Hume, 1952. 8. Low Temperature Insulation, Newalls Insulation Company Limited. CHAPTER 2 HEATING LOADS HEATING load may be defined as the maximum hourly heat output required from the heat generator to establish or maintain the design internal temperature when the outside air is at the design temperature.

H. h. 10 {opposite) 1. The rates of air change given in this table are those to be allowed for natural ventilation or infiltration. Where the number of occupants can be estimated, the rates of air change should not be less than 1500 ft3 per person per hour. 2. Additional allowances must also be made for exceptional conditions such as are produced by large doorways and ventilators, and also where the pro­ cesses carried on require additional ventilation for the extraction of dust, fumes or other impurities.

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