a steam turbine operates adiabatically at a power of 4000KW. Steam enters the turbine at 2500kPa and 500 degree celcius and exhausts from the turbine as saturated vapour at 20kPa. a. What is the steam rate through the turbine? b. What is the turbine efficiency?

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Modern high speed trains do not have perpendicular expansion gaps where rails are joined end-to-end any more they are mostly welded together but what might happen if there was a spell of particularly hot weather that causes inspection of the tracks?

Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.