Sentences with phrase «= btu»

Not exact matches

Highly efficient transmission values meeting the German Passive - House - Standard Uw = 0.125 Btu / hft °F / R - 8.0 (including thermal bridging of all connectors)

I can see two effects — reduced need for A / C (one estimate I saw was 6 - 10 tons of A / C (12,000 BTU = 1 ton) from spraying a flat black rubber roof with water in a dry environment and letting it evaporate — but a white roof wouldn't need spraying in the first place), and the other is from increasing reflection into space?

To get 33.7 kWhs to one gallon, they have basically done a conversion through BTUs — ie 1 KWh = 3412 BTU and one gallon of gasoline releases 115,000 BTU of energy in combustion.

The 1500 BTU / day heat loss would cool 50 gallons of water by (1500 BTU / day) / -LRB-(50 gal)(8.3 lb / gal)(1 BTU / lb - F)-RRB- = 4 F a day from heat loss through the bottom and sides.

5Potential carbon dioxide emissions can be calculated by use of the following formula: percent carbon ÷ Btu per pound x 36,670 = pounds (lbs) of carbon dioxide per million (106) Btu.

This is about (0.16)(70K BTU / hr) = 11000 BTU / hr directly incident on the floor.

If the barrels start the day at 55F, and end the day at 75F, then the cooling available for this per barrel would be (50 gal)(8.3 lb / gal)(75F - 55F)(1BTU / lb - F) = 8300 BTU per barrel — a useful amount.

If the barrels start the morning at 55 F, and we circulate air over them during the day to cool the shop with the idea that we would like to keep the shop to about 80F or a bit more, then the useful stored coolth is (75F - 55F)(1670 lb)(1BTU / lb - F) = 33,400 BTU of available cooling.

If the 23 watt Dayton fan were able to cool the 4 barrels by 10F over (say) 6 hours of operation, the cooling would be (1670 lbs)(10F)(1 BTU / lb - F) = 16700 BTU for an energy consumption of (6 horus)(23 watts) = 138 watt - hrs or 470 BTU.