1. A power plant for a polar expedition uses ammonia, which is heated to 80?C at 1000 kPa in the boiler, and the condenser is maintained at -15?C. Find the cycle efficiency.
2. A Rankine cycle with R-410a has the boiler at 3 MPa superheating to 180?C, and the condenser operates at 800 kPa. Find all four energy transfers and the cycle efficiency