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Figure 2.1.7
energy consumed” first (see figure 2.1.6) with equivalent energy offset for
auxiliary fuel following.
In the Space-Saver™ appliance, the water is heated by both solar and an
auxiliary fuel source (electricity). The Thermal Energy Controller monitors the
thermal energy produced by solar and the electric energy consumed by the
appliance. Energy used is based on the amount of power consumed over a
period of time, given in the units of Watt-hours (Wh).
The power delivered to the heating element in the tank will not be
constant; however, the Thermal Energy Controller must assume that the power
supply is constant because it does not have a power meter hooked up to it.
Thus, an average power consumption by the heating element is assumed and is
set upon installation. The electric energy for the heating element is deducted
from the total energy delivered by the Space-Saver™ in order to show the
amount of solar energy delivered.
Figure 2.1.6 is an example of a daily electricity consumption, 2 739 Wh
(or 2.739 kWh). The lightning bolt (
) – representing electricity as the
auxiliary fuel – blinks on this screen, indicating that it is showing the amount of
energy consumed by the heating element.
Pressing the up button again will show monthly (
) auxiliary energy
consumed; press again for yearly (
), and once more for cumulative (
).
Pressing up from the cumulative value will display daily equivalent energy offset
for auxiliary fuel (see section 2.1.7).
2.1.7 Equivalent energy offset for auxiliary fuel
Pressing the up button from
cumulative energy produced (see
section 2.1.5) will display “daily
equivalent energy offset for auxiliary
fuel” on the EnerWorks High
Performance Appliance (see figure
2.1.7). Since the EnerWorks Space-
Saver™ Appliance uses electricity within
the same tank as the solar storage, the
Thermal Energy Controller on these
single-tank appliances will show “daily
auxiliary energy consumed” first (see
section 2.1.6) with the daily equivalent energy offset for auxiliary fuel following.
