The gas Heat Pump
Uni of Warwick have developed a small absorption refrigeration system - like gas fridge. A heat pump run on gas not electricity - a heat pump is a fridge compressor. They are making the absorption version smaller, as these were too large for many real applications. It appears the COP has improved as well. An electric heat pump at COP 4 is the equiv to run in costs as gas, as gas is about 1/4 of the price of electricity per kW. A heat pumps can give out 4 kW when consuming 1kW (COP 4). A seasonal average what is needed really.
Now if this absorption unit is smaller and has say COP 2 running on gas then it looks good. They can heat a house or hot water. At COP 2 using gas means the equiv of COP 8 using an electric heat pump in running costs.
This means the inefficient air-to-air heat pumps run by cheap to buy gas are quite cheap to run indeed. If COP 2 is maintained gas heating bills for the average house will be more than halved. Install these into highly insulated homes and the heating bills will be very low indeed.
That is air-to-air. Have a water or ground sourced system and the heating bills are lower again maybe to a 1/4 or less of current gas bills. It is all to do with the cost of gas vs. electricity per kW. These promise to be superb for retrofit applications.
These units are so small they can use the waste heat from car exhausts to cool a car, improving efficiency when cooling.
If gas equals electricity in kW to buy then the electric heat pumps will probably be more efficient for buildings, and these units relegated to cars only.
Looks good indeed, reduced fossil fuel use.