Diy Air Conditioner Using Groundwater How Would I Use A Window Air-conditioner And A Supply Of Ground Water To Create A DIY Heatpump?

How would I use a window air-conditioner and a supply of ground water to create a DIY heatpump? - diy air conditioner using groundwater

How is all that I see the groundwater flows in the coils 'internal', then extract the hot air from "outside" coil. My first concern are the following: 1 how to calculate the optimal water flow and 2 corrode the groundwater after the turn "in the" coils.