Determine the rainfall excesses during successive 30-min. period by the NRCS method using storm pattern given in the table 1. The watershed is part of an urban impervious area. The hydrologic soil group is C and the soil is in a dry condition (condition 1). Time(min) 30 60 90 120 150 180
Rainfall(in/hr) 0.5 0 0 4.5 5 3

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.