Q. A 30 MW geothermal electric power plant uses hot steam from the earth at 157 deg C to heat and vaporize isobutene, which turns a turbine that is connected to a generator. The isobutene is subsequently cooled to 27 deg C using fans and condensed back to a liquid. The overall efficiency of the plant is 40% of the ideal (Carnot) efficiency. How many joules of heat must be released to the atmosphere per second?

Answer: 2.2 x 10^8 Provide complete solution please, thank you!