GEM has always taken temperature log files from the boilers when it installs its M2G Advanced Boiler Control (ABC).
The temperature file gives minute by minute information on the flow and return water temperatures in and out of the boiler
By charting and analysing each individual boiler cycle GEM can report on in-efficiencies in the system.
Forensic boiler audits can give detailed information on items such as …
excessive purge losses
boiler heat transfer rates
boiler thermostat switching differential/hysteresis
loading demands on the boiler
load share across a number of boilers
This simple temperature log file was taken over 10 hours on a Leisure Centre boiler and shows the boiler nuisance cycling i.e. cycling on when there is no demand from the heating circuits (i.e. no deadband/temperature difference/Delta T) between the boiler flow and boiler return water temperatures. This is very wasteful of fuel (in this case Oil) and can also cause premature ageing of boiler plant.