Problem Statement Given the dry-bulb temperature, Tab and relative humidity, the wet-bulb temperature may be calculated from the psychrometric equation (Jones, 1994): (1) Py = Ps - Patm A (Tab - Twb) The vapor pressure Py is given by: Py = Pys ) (2) where: Py = vapor pressure at Tab (kPa) Ps = saturated vapor pressure at Twb (kPa) Pvs = saturated vapor pressure at Tab (kPa) Patm= atmospheric pressure (kPa) (Patm =101.325 kPa) Tab = dry-bulb temperature (C) Twb = wet-bulb temperature (C) A = 6.66x10+ C'(sling) p=relative humidity (%) used in the calculations as (%/100=0.6) The saturated vapor pressures Pss and Pvs are calculated at Twb and Tab, respectively by: log10 P = 30.59051- 8.2 log10 T +0.0024804 T - 3142.31/ T (3) Where T is in Kelvin and P in kPa. Solve Equation (1) for the wet-bulb temperature using Newton-Raphson method. The input is as follows: Tdb= in C and += in % (for example of the relative humidity is 60%; use 0.6). Set the tolerance to give accuracy of 4 significant digits. Locate the result on Psychrometric chart