1. Compare the following heat sources assuming the cold side of the cycle is 300 K: (a) Hot brines (liquid water) with p = 1000 kg m-3 and Cp = 4180 Jkg-?K-generated as a by-product of oil and gas extraction in the North sea: 100 000 UK barrel per day at 90C. The exhaust stream is cooled down to 70C. (10 marks] (b) Exhaust from a heat treatment furnace (flue gas) with p = 1.2 kg m-3 and Cp = 1000 Jkg-1 K-1 generated at 900C and 15 000 m3 h-1. The exhaust stream is cooled down to 180 C. (10 marks) 2. A solar tower power plant has a field of 2000 heliostats, each with a surface area of 30 m2