Good diagram. But, does it account for the difficulty in insulating UK homes to support heat pumps? Having embarked upon the process of insulating our 1930's detached home, it is definitely not a trivial process usually requiring bespoke techniques for each property.
Heat is heat. There is no difference for heat pump heat or heat from a boiler or gas.
Not true. optimum working temperature is different between different systems - heat pumps don't produce the higher temperatures needed to overcome poor insulation. Replacing a traditional pumped water/gas CH system with HP usually requires radiators to be up-sized to get the same output at a lower temperature drop.
If it works for Norway, there is really no reason why it wouldn't work for the UK or here.
And the diagram is horribly optimistic where it comes to the efficiency.
Why??? A well insulated house allows for a SCOP of 4.5 or so. Badly insulated houses obviously need to get moving on improving that but would still allows for a 3+ SCOP (with fan trays or whatever).
At low temperatures the heat pumps will have to go into resistive heating mode requiring the original 70GW.
I think perhaps you're working with an outdated set of information on heatpumps.
And what happens if the turbines don't spin?
Well, that's an interesting question for
any discussion on renewables but for fun and giggles: with a COP of 4 you'd still only burn half the gas in an electricity plant compared to your house boiler.
Bottom line: the diagram is made by a complete idiot.
In that case a
lot of people are complete idiots because it pretty much represents the consensus amongst energy scientists. Yes, putting the windmills as energy source in the picture is a bit rosy but that doesn't change the bottom line.