■ "Natural cooling" (as option with or without mixer)
– The compressor is shut down and heat exchange occurs directly
with the primary circuit.
Sulla on nyt tainnut mennä jotain ohi. Viessmannin ja muiden saksalaististen "natural cooling" on ominaisuus missä lattilämmityksen tai erillisen jäähdytyspiirin vettä jäähdytetään levylämmönvaihtimella käyttäen kaivon liuosta. Kuvassa oikeassa ylälaidassa oleva laatikko.
"Passive cooling
Passive cooling is also known as "natural
cooling". From a room, this system extracts
heat that is transferred to the primary source.
For this, the heat pump compressor is idle.
An additional heat exchanger provides the
system separation.
Natural cooling with brine/water heat pumps
is highly efficient, as it requires the operation
of only two circulation pumps. During natural
cooling, the heat pump will only be started
to produce domestic hot water. The primary
temperature rises on account of the heated
heat transfer medium, which results in an
improvement of the performance factor during
DHW heating. Prefabricated assemblies can
be used with Viessmann heat pumps to utilise
natural cooling.
Natural cooling is possible with the following
systems:
underfloor heating system,
fan convectors,
chilled ceilings,
concrete core tempering.
The indoor air can only be dehumidified
in conjunction with natural cooling if fan
convectors are used – this requires a
condensate drain. With cooling via alternative
heating surfaces the system is regulated so
that condensation, i.e. undershooting the dew
point on the heating surfaces, is avoided.