An air-conditioning system delivers moist air to a classroom through a duct. a fan within the insulated duct delivers moist air at the duct exit at 22°c, 60% relative humidity, and a volumetric flow rate of 0.5 m3/s. at steady state, the power input to the fan is 1.3kw. using the psychrometric chart provided (figure 5), determine the temperature and relative humidity at the duct inlet.

Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.

For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater

Which of the following controllers anticipates the future from the slope of errors over time? a)-proportional b)-on/off c)-integral d)-derivative.