Data loggers recording temperature, relative humidity, CO2, count, voltage, power usage and other parameters provide the information required to help pinpoint areas and equipment which could benefit from straightforward energy saving measures. They can test, measure and help verify improvement work in particular areas, and can help validate overall building systems performance.
Regular monitoring and analysis of results will help identify
and prioritise the most appropriate energy saving measures in line
with energy management targets including ESOS (Energy Saving
Once the data has been recorded, informed decisions can be made
about implementing changes. ESOS has some suggestions on common
energy savings opportunities, and Tinytags can be used to help
provide information in many of these areas. These include:
Monitoring the performance of HVAC systems
and relative humidity data loggers help monitor the
effectiveness of HVAC systems. They are frequently used to validate
whether heating, air-conditioning or building control systems are
working correctly, and help assess overall energy efficiency. Along
carbon dioxide loggers, they can also be used to assess
occupants' comfort levels and help ensure that optimum air quality
is maintained within a building. In addition, energy
consumption loggers can be used to help check motor efficiency
and record power usage in heating, ventilation and air-conditioning
All the above devices can play a key role to help verify and
assess energy efficiency savings when these systems are replaced or
Monitoring the efficiency of building materials
consumption and temperature
data loggers can be used to assess efficiency savings when
roof, wall and window insulation is improved or replaced. Before
and after monitoring can help quantify savings and identify
specific areas of improvement.
Monitoring the efficiency of equipment e.g. boilers
loggers can help assess boiler efficiency, monitoring
consumption and recording profiles over time. Voltage
loggers can record when a boiler is firing to help evaluate
Assessing before and after performance of replacement lighting
Logger can be used for before and after monitoring to assess
the performance of low power lighting installations, which can be a
very effective means of reducing energy consumption.
Monitoring equipment in industrial processes e.g.
refrigerators, motors and drives
Logger and temperature
loggers can be used to assess the efficiency of refrigerators,
recording power usage against temperature. Count loggers can
be used to record and monitor door openings which will affect the
energy performance of a particular area.
Logger can assess energy usage typically before and after items
are repaired/serviced or replaced.
Common energy saving opportunities
Once the information from the data loggers has been recorded and
evaluated, specific steps can be taken to implement common energy
saving measures for particular pieces of equipment or widely
throughout a building. Practical steps recommended by ESOS
Heating: turn heating down, replace inefficient
boilers, install de-stratification fans (fans used in
Commercial/industrial buildings with high ceilings), shorten hours
Ventilation: specify higher efficiency motors,
consider variable speed fans, review time settings and turn off
when not in use.
Air-conditioning: review temperature controls,
consider variable speed drives, free cooling coils, using external
air as a source of cooling.
Lighting: install occupancy sensors, install
daylight sensors, review and improve the maintenance plan (more
regular maintenance), replace inefficient incandescent bulbs with
high efficiency LED lighting or energy saving fluorescent lighting
(e.g. T5 lighting).
Building fabric: install cavity wall and roof
insulation; install high efficiency windows and glazing and draught
Building control: install a computer-based
building management system, ensure control systems are set
correctly for different weather conditions and occupancy levels,
install variable-speed drives.
Refrigeration: reduce the heat loads on systems
through reduced air infiltration, free cooling, raise process
temperatures, improve control of auxiliary equipment (pumps/fans),
install better temperature control, keep doors closed, don't
overfill units, ensure lights are off inside units when not in use,
regular cleaning of the condenser.
Motors and drives: install high efficiency
motors, install variable speed drives, implement automatic switch
off controls/procedures, install time switches, interlocks or
sensors, monitor motor output to identify energy wastage.