Optimization of the installation location of an air-to-water heat pump

You will not notice any difference in efficiency with an air-to-water heat pump, regardless of whether it is located on the weather side or not. With your alternative 2, the solution in the corner, I would have more concerns regarding thermal short circuit. It is not wrong if the wind quickly removes the generated cold.

Great, thanks for the information

Basically have the same conditions as you and our device is located on the street. It doesn't look quite as "nice" in front of the house, but better that way than in the backyard.