How much energy does it take to pump the heat from a primary loop at a temperature tolerated by the silicon to a secondary loop at 900 K? If we pick 300 K for s

How much energy does it take to pump the heat from a primary loop at a temperature tolerated by the silicon to a secondary loop at 900 K? If we pick 300 K for simplicity, would we not need twice as much energy as we want to get rid of just to raise the temperature? 2 MW to raise 1 MW from 300 K to 900 K?