Ex.4) Design a T-beam for the floor system shown below. The span is simple and is 4.0 m, the service
applied moments are Mo = 270kN. m and My = 575kN. m. fo = 21MPa and f, = 420MPa.
75 mm V
600 mm
1800 mm
375
1800 mm
375
1800 mm
375 1800 mm
>
k
키
|800 mm

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.