Exercise - Week 2 A heat engine (#1) working between 1,000 K and 500 K is assumed to has an efficiency equal to the Carnot efficiency. The available heat source at 1,500 K delivers 100 kW to the above engine through a block of material placed between the heat source and the engine. The block of material also reduces the temperature from 1,500 K to 1,000 K. This block is 100% efficientthe 100 kW that enter from one side is entirely delivered to the engine on the other side. What is the efficiency of the system above? What is the power output of the system? Now, replace the block by a second engine (#2) having a 10% efficiency. The heat source at 1,500 K still delivers 100 kW. The #1 engine operates between 500 K and the temperature that is available for the heat from #2 engine. What is the overall efficiency of the two engines working together?