Although lower flow rates and higher energy factors remain central, the bills pending in Arizona, Illinois, Massachusetts, Pennsylvania and Virginia reveal a more profound structural shift.
The two photos below were from the same project. Flow is upward through the vertical pipe in Figure 1. Without any more details being described, can you spot at least two problems in each photo?
The goal is to keep the system COP as high a possible as the operating conditions of the heat pump change. The logic behind maximum COP tracking is to continually look for an earth loop flow rate that improves the system COP.