Abasic open gas turbine cycle uses a pressure ratio of 8. the isentropic efficiency of both the turbine and compressor is 90%. the low pressure in the cycle is 100 kpa. the temperature limits in the cycle are 20°c and 1250°c. take k = 1.4, cp = 1.005 kj/kg k and the mass flow as 25 kg/s. (a) calculate the cycle efficiency and the nett power output. (b) if the fuel calorific value is 41mj/kg estimate the air fuel ratio.

Select any two (2) areas of applications of chain-drive. (clo4) a)-permanent lubrication necessary b)-hydraulic forklift truck operation c)-rigging and heavy moving materials d)-relatively high maintenance costs e)-costlier than belt drives

Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]

Aheavily insulated piston-cylinder device contains 0.02 m3 of steam at 300 kpa and 200 °c. 1.2 mpa. d this process. team is now compressed in a reversible manner to a pressure of etermine the entropy change and the work done on the steam during this process