REMKO CMF-120-1P - Manual (Page 67)

Coefficient of performance
The current ratio of thermal output
produced by the heat pump to
the consumed electrical power is
referred to as the coefficient of
performance, as measured under
standardised boundary conditions
according to EN 255 / EN 14511.
A coefficient of performance of 4
means that a usable thermal output
amounting to 4-times the electrical
power consumption is available.
Single energy-source mode
The heat pump covers a large
proportion of the required thermal
output. On a few days per year an
electrical heating coil supplements
the heat pump under extremely low
outdoor temperatures.
Dimensioning of the heat pump for
air/water heat pumps is generally
based on a limit temperature (also
known as balance point) of approx.
-5 °C.
Monovalent mode
In this mode, the heat pump is
the sole heating appliance in the
building all year round. Monovalent
mode is primarily used in
combination with brine/water and
water/water heat pumps.
Storage tank
The installation of a hot-
water storage tank is generally
recommended in order to extend
the running time of the heat pump
under low heat requirements. A
storage tank is required for air/
water heat pumps in order to
bridge off-periods.
Noise
Noise is transmitted in media such
as air or water. Essentially there are
two types of noise, airborne sound
and solid-borne sound. Airborne
sound is transmitted entirely via the
air. Solid-borne sound is transmitted
in solid materials or liquids and is
only partially radiated as airborne
sound. The audible range of sound
lies between 20 and 20,000 Hz.
Sound pressure level
The sound pressure level is a
comparable characteristic quantity
for the radiated acoustic output
of a machine, for example, a heat
pump. The noise emission level
at certain distances and acoustic
environments can be measured.
The standard is based on a sound
pressure level given as a nominal
noise level.
Split AC unit
Design where one part of the
device is positioned outdoors and
the other inside the building. Both
units are connected to each other
by a refrigerant pipe.
Evaporator
Heat exchanger on a refrigerant
plant which uses the evaporation
of a working medium in order to
extract heat from its environment
at low temperatures (e.g. the
outdoor air).
Condenser
Heat exchanger on a refrigerant
plant which liquefies a working
medium in order to transmit heat
to its environment (e.g. the heating
system).
Regulations and guidelines
The erection, installation and
commissioning of heat pumps
has to be undertaken by qualified
specialist engineers. In doing so,
various standards and directives are
to be observed.
Heat requirement assessment
A precise dimensioning of the
system must be carried out for
heat pump systems in order to
maximise efficiency. Calculation of
the heat requirement is undertaken
according to national standards.
However, approximate
requirements can be determined
based on the W/m² tables
multiplied by living space to be
heated. The result of this is the
overall heat requirement, which
includes the transmission heat
requirement and the infiltration
heat loss.
Heat pump system
A heat pump system consists of
a heat pump and a heat source
system. For brine and water/water
heat pumps, the heat source system
must be made available separately.
Heat source
Medium from which the heat pump
derives heat, in other words, soil,
air and water.
Heat carrier
Liquid or gas medium (e.g. water,
brine or
air), in which heat is transported.
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