Running 45 MW of miners != Producing 45 MW of energy != Producing producing 45 MW of waste heat. First you have to consider the thermodynamic efficiency of the

Running 45 MW of miners != Producing 45 MW of energy != Producing producing 45 MW of waste heat. First you have to consider the thermodynamic efficiency of the power plant. With a ~40% efficiency, 1 W of produced heat wastes 1.5 W of heat. Then you have to consider the overhead for running the miners. Ballpark, about half of the energy probably goes to HVAC. Furthermore, that 45 MW of mining power is also eventually getting released as heat, some of which may be returning to the lake. Overall, 45 MW of bitcoin produced could mean 135 - 180 MW of waste heat.