Jun 23, 2004 #1 JPARKER70 Electrical Dec 10, 2003 25 IS THERE A FORMULA FOR CALCULATING HOW MANY BTUS A UNITS IS PUTTING OUT?
Jun 23, 2004 #2 Istre Mechanical Feb 11, 2004 40 Multiply the output of the unit in tons by 12,000 to convert to BTU output Upvote 0 Downvote
Jun 23, 2004 #3 lilliput1 Mechanical May 1, 2003 1,054 Sensible Heat Btu/hr = CFM x 1.1 x (t2 - t1) Latent Heat Btu/hr = CFM x 4840 x (w2 - w1) Total Heat = Sens Heat + Latent Heat or Total Heat Btu/hr = CFM x 4.5 x (h2 - h1) Where: t = dry bulb temperature °F w = lb water/lb dry air humidity h = enthalphy Btu/lb 1 = entering condition 2 = leaving condition You have to be familiar with the psychrometric chart to know and visualize the state points of air and processes. Upvote 0 Downvote
Sensible Heat Btu/hr = CFM x 1.1 x (t2 - t1) Latent Heat Btu/hr = CFM x 4840 x (w2 - w1) Total Heat = Sens Heat + Latent Heat or Total Heat Btu/hr = CFM x 4.5 x (h2 - h1) Where: t = dry bulb temperature °F w = lb water/lb dry air humidity h = enthalphy Btu/lb 1 = entering condition 2 = leaving condition You have to be familiar with the psychrometric chart to know and visualize the state points of air and processes.
