Engineering, 25.11.2019 21:31 vava19

Supply air for a building is heated from state 1 to state 2 by an electric heater. given the conditions below determine the following.

--given values--

dry bulb: t1 (f) = 42

relative humidity: phi1 (%) = 75%

mass flow rate of air: ma1 (lba/h) = 1792

dry bulb: t2 (f) = 86

a) determine the specific volume of the air (ft^3/lba) at state 1. 12.727

b) determine the dew point temperature (f) for state 1 34.65

c) determine the wet bulb temperature (f) for state 1. 38.72

d) determine the humidity ratio at state 1. 00420351

e) determine the specific enthalpy (btu/lb) at state 1. 14.618

f) determine the specific enthalpy (btu/lb) at state 2.

g) determine the electric power (kw) required for the heater.

h) determine the electric current (amps) through the heater if the supply voltage is 220 v

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Supply air for a building is heated from state 1 to state 2 by an electric heater. given the conditi...

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