I have measured air flow in an air cooled heat pump in summer season and winter season, and I have found that air flow is much greater in winter than in summer (2200 m3/h in summer vs 3700 m3/h in winter), when I've always thought it was the opposite.
I believed it was much higher in summer...
We are at small workshop in Spain producing parts for special HVAC equipment and need to weld copper tubes to 316 plates for water condensate removal.
We are used to solder copper to copper with silver as well as welding plates of galvanised steel. I think that SS cannot welded to copper using...