CHARACTERISTICS
The RFS-HE horizontal heat recovery units feature compact
dimensions and easy assembly. The rotary heat exchanger is made from aluminium
sheets, alternatevely plane and corrugated, one another wrapped. The result
is a honey-comb structure in wich conducts pass both the fresh air and the
stale air flows. The exchanger surface, made porous and hygroscopic by some
treatments, allows to absorb the humidity. Half the rotor is immersed in the
stale air flow which (in winter conditions) yields heat and humidity to the
hygroscopic matrix; then, as a consequence of rotation, the fresh air flows
in these conducts, recovering both heat and humidity (latent heat). The two
fans are centrifugal type.
The rotary exchanger allows, in winter conditions, to recover both the sensible
and the latent heat. So it’s possible to achieve peak effIciency up to
90%. In summer conditions a part of the humidity contained in the inlet flow
is ceded to the expusiIon flow, achieving analogous peak efficiency. Thanks
to this high efficiency, the fresh air in winter conditions can be directly
introduced in air-conditioned rooms, without instalIing post-heating sections.
The inlet fan is pressing on the heat exchanger, so the air blow-by direction
is from the fresh air to the stale air flow.
The dram pan collector is not present because the humidity contained in one
of air flows is partially absorbed by the porous surface but then completely
transferred to the opposite flow: therefore the humidity condensation is avoided.
With the fans working, it is possible to stop the heat exchanger rotation:
so we realize a “virtual bypass”, useful during the between season.
Available also in the version with Bioxigen system.
CTS
