E
LTG Incorporated · PO Box 2889 · Spartanburg, S.C. 29304, USA
Chilled beams HDF-us-OM (01/17)
Phone 864 599-6340, Fax -6344 · [email protected] · www.LTG-INC.net
Former editions are invalid · Subject to technical modifications
page 13 of 30
Installation, operating and maintenance instructions
Active chilled beams HDF-600, ceiling installation
4.3
Caloric output data
Caloric output data were determined at a test stand in the
LTG test lab. Data are valid if the following applies:
- unit at operating temperature, steady-state condition
- steady-state condition during measurements
- no condensation at the heat exchanger in the cooling
mode
- water without additives (drinking water quality)*
- water supply temperatures from
54 °F to 61 °F
_
in the cooling mode and
122 °F to 140 °F in the heating mode.
Parameters used:
- specific heat capacity of the water
1.0 BTU/lb °F
- specific heat capacity of the air
0.24 BTU/lb °F
- Air density
0.076 lb/ft
3
To ensure easy transferability, the specific caloric outputs
- i.e. the absolute caloric outputs in relation to the temper
ature difference between water intake and induction air
before entering the heat exchanger - are given.
The outputs given in the chart do apply with specific nomi
nal flow rates only. These are stated for each type and
size.
The correction charts give a graphic illustration of how
outputs change with other flow rates compared to nomi
nal flow rate output.
Flow rates have been determined through calculation and
may vary by about 10%.
*
Addition of ethylene glycol to lower the freezing
point:
To lower the freezing point, cooling water is often
mixed with ethylene glycol. The lower specific thermal ca
pacity of the mixture reduces the unit's cooling capacity.
Содержание HDF-600
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