Having the ability to calculate the tonnages for a sheet metal project is vital for the completion and success of your project.Formula. T = P x Th x C. T =
Calculate heat transfer rate, Q. Q is measured in units of energy per unit time, such as BTU/hr or Watts. For a wall of uniform thickness d, with a thermal conductivity of k, an area of A, a hot temperature, Thot, and cold temperature, Tcold, solve Q with the following equation:...
For flow through natural features, such as a riverbed, you have to approximate the area. Assume the deepest part of the river to be the radius of a semi-cylindrical trough. Calculate the cross-sectional area using πr2, then take half of that and use that for A in the ...
Calculate the cross-sectional area for both pipe one and two by multiplying the square of the radius by the number pi, 3.14. In the example calculation that follows, the symbol "^" represents an exponent. Performing this step, you have for the first pipe: 3.14 x (2.5 inches )^2 or 19...
How To Calculate How Much kWh Does AC Use Why are we are always talking about tonnage and SEER rating? Simple. How much electricity air conditioners use is directly proportional to: AC capacity (tonnage). Thebiggerthe unit, themoreelectricity it will use. ...
knowntonnage(or BTUs), theSEER rating, and theHSPF rating, we can calculate almost exactly how much electricity a heat pump use (watts, kWh usage)per hour,per day, and evenper month. Based on that, we can calculate how much it costs to run a heat pump per hour, per day, and per...