Question

in New York, for one year Estimate the amount of natural gas used, in ft/day. To hea from the following data: Winter design heat loss = 120,000 Btu/hr • Design indoor temperature - 70PF • Design outdoor temperature - 10°F • Thermostat setting - 68°F Continuous internal gains of building = 15,000 Btu/hr Average furnace efficiency = 78% Heating value of natural gas = 1000 Btu/ft!

Answer 1

Solution : A Given that Winton design heat loss = 120000 Bluffy Design indoor terperature = for Design autoooor temperatcore = 107 Thermostat setting = 68%. nverage burace elbicierzy = 78%. Hecting value of netwal gas = 1000 Btelff? continuous integrad Garing of building = 150cco Behr : Heat corected due to design temp Q = 0.204x com XAT = 0.204 x (70-10) * 1000 = 12240 Blue/hor, Design of heat loss then winter heat loss so amount of notuord ges used

winteor design heat (os x (Design Inlet trop - atlet trop) Hating ielie of natural gou x theoretat Settingen 120000x (70-10) 1000x 0.78X 68 7200000 5.3040 135.74 ft3/h 3257.96 $63 /cky