Hoval A 60 - Sorption Wheel

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10.3 Sorption wheel
Rotary heat exchanger for heat and humidity transmission
consisting of wheel and casing; suitable for optimum dimen-
sioning in accordance with VDI Directive 3803 Page 5.
Wheel
The storage mass consists of corrugated and smooth corro-
sion-resistant aluminium foil with highly effective sorption
coating for humidity transmission. Silica gel is used as
sorption material, ensuring ideal humidity transmission. The
result is small, axially arranged, smooth ducts for laminar
ow of air. The outside of the storage mass is supported by
the wheel mantle; the hub is inside with the permanently
lubricated, maintenance-free roller bearings and the axle.
The wheel is permanently stabilised by internal spokes
between the wheel mantle and hub.
Casing
■ Sheet-metal casing (for one-piece wheels):
Self-supporting construction of aluzinc sheet steel, suit-
able for installation in ventilation units. The automatically
adjusted, abrasion-resistant slide seal with constant-
force springs (Hoval high tightness seal) reduces internal
leakage to a minimum. A lip seal is used as the transverse
seal. The motor for the wheel drive can be installed in the
casing.
■ Prole casing (for multi-component wheels):
Construction of aluminium extruded sections with aluzinc
sheet steel panels, suitable for installation in ventilation
units. The high-quality ring seal on both sides in the
double-acting support springs reduces internal leakage to
a minimum. A lip seal is used as the transverse seal. The
motor for the wheel drive can be installed in the casing.
Options
■ Drive: 3-phase gear motor with belt pulley and v-belt.
■ Control unit: for innite control of speed of rotation; insula-
tion class IP 54. The software includes the speed moni-
toring and intermittent operation for cleaning.
■ Operating unit: for modication of the control program and
manual operation (plugged into the control unit).
■ Speed monitoring: by sensor and an inductive sensor on
the rim of the wheel.
■ Purge sector: prevents rotation of the extract to the supply
air in the event of pressure gradients between supply air
and exhaust air, adjustable to minimise purge and energy
loss.
■ Inspection cover (on both sides): allows visual inspection
of motor and belt.
■ Duct design: casing with enclosed side walls for duct
connection.
■ Coated casing: for applications with very high hygiene
requirements (powder-coated red RAL 3000).
■ Offset wheel position: for optimum adjustment to the
installation situation.
Specication texts