Measuring, logging, and improving efficiency.

[Sccoupe]

---Since drilling has stopped for the winter and the heat pumps are blowing heat, its time to start measuring how everything is working. At this point about 380 feet of vertical bore holes have been completed and plumbed in. Two heat pumps are sharing the loops, each with its own Grundfos UPS 15-58 circulator. In both situations, the pump is wired to the compressor so that power usage is captured. The closed loop, non-pressurized system is filled with 50/50 water/Cryo-Tek 100 Anti-Freeze. One heat pump is a one ton Tranquility 16 that I think is usually used in hotel rooms with chiller/boiler setups. The other is a Haier HPND14XHT two hose portable heat pump that I converted to geothermal using a 1 ton coaxial condensor (PACKLESS INDUSTRIES COAX-2100-S-07-85).
---With everything up and running, it was time to start logging temps and power usage to see what efficiency is on the converted Haier heat pump. This was done using some one wire ds18b20 waterproof temp sensors, a YF-S201 flow meter, and a PZEM-004T power meter. All were fed into a Parallax Propellor, assembled into TCP packets, and sent up to Thingspeak via an ESP8266 wifi module at one minute intervals.
---Live data over the last hour can be seen here https://thingspeak.com/channels/384173
---Older data compiled on a single graph with calculated COP can be seen here http://gaugetrade.com/temp/graph.html You can click and drag on the chart to zoom in on the data. Double click the graph to zoom back out. Note that in this graph, the power is times 10 to better fit the other graph data. This has only been running since last night, so this is all there is for now. I have to dump the data into this graph manually from Thingspeak and add COP.
---COP is at about 2.15 which isnt great, especially for a geothermal setup. Even the Thanquility is at 2.9 COP which seems low i guess.
---Things I need to check on...
-Verify that the flow meter is showing what is actually being pumped.
-Verify that the power meter, which is reading in watts is not calculating with a power factor.
-The Tranquility wants 2.2gpm minimum, but its only getting 1.4gpm as is the Haier. I assume they both want more. Why are the pumps not pushing more?
-Need to fill the Haier charge correctly. The pressures match the factory readings before disassembly, but 'fresh' R410A wasnt used and I only vacuumed for 20 minutes.