Ahome heating system can be controlled by a thermostat. identify two other feedback control systems that can be found in most residences. describing briefly how each control system works, identify the sensor, controller, and actuator (the means by which the manipulated variable is controlled). identify the controlled variable and manipulated variable in each case, as well as a potential disturbance (remember: disturbance variables are factors that are accounted for in overall mass or energy balances, not bizarre fantasy impacts).

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

Give heat transfer applications for the following, (i) gas turbines (propulsion) ) gas turbines (power generation). (iii) steam turbines. (iv) combined heat and power (chp). (v) automotive engines

Inspection for bearing condition will include: (clo4) a)-color b)-smell c)-size d)-none of the above