IMO, and I've studied both heat pumps and heat engines for a very long time, your comment only demonstrates a lack of understanding regarding the details of how either machine or appliance actually operates. These "Ideal" scenarios of a heat pump actually being a heat engine running backwards are about as silly as saying: if you turn the crankshaft on your lawnmower backwards it will produce gasoline. A heat pump running backwards is an air conditioner. All either one does is move heat