Projects
instances a fully-evaporative solution will be the most efficient.
Benefits from an adiabatic unit are, energy efficiency, water
saving, redundancy, plug and play system with built in controls,
to name a few,” he says.
The project was another successful joint venture between
BAC and Mechanical Cooling Maintenance.
The design specification and energy simulation considers
the following:
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Cycles of Concentration = 6.
Peak heat load = 1381kW.
35°C water temperature in, 29.5°C water temperature
out, 22°C wet-bulb temperature.
The original unit used a Baltiguard drive system,
which has a larger motor with a smaller motor to kick
in based on demand. The units also used to alternate
operation based on demand with a single unit
operating at times.
The minimum speed of the EC fans has been set
to 21%.
A typical HVAC load profile has been estimated.
Despite the significant layout requirement of the
adiabatic unit, sufficient space was available.
Adiabatic total footprint is 31.9m 2 compared
to 13.7m 2 .
No free cooling has been calculated. RACA
The units are expected to save not only water, but electricity too.
44
RACA Journal I February 2020
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