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Centre
for Maritime Environment and Safety is located in Horten. The group og
buildings consit of:
Heating and cooling are distributed by water circulating systems. |
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Heating
is mainly based on use of seawater based heat pump. Refrigerant is ammonia
in combination with single stage piston compressors. Rated heat output for
the heat pump is 225 kW. Water in heating circuit is then heated from 35 to 50 oC.
As supplementary heat 2 off oil fired boilers with a total output of 450
kW may be used. The seawater intake is located at 100 meters depth. This location gives more advantages. Little contamination and scaling reduce need of maintenance. During summer the temperature level (6-9 oC) provides for the necessary climate cooling directly ("free-cooling"). The heat pump was commissioned end of 1996 and has shown a reliable record. The coefficient of performance is between 4 and 5. |
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Technical room is located in the middle building at the front (small and lower part of the building of bricks). The heat pump is installed in a separate gas tight room because of the applied refrigerant that is ammonia. Additional costs due to safety reasons and regulations compared to other possible refrigerants ("halocarbons") are not crucial. Use of ammonia in the heat pump was considered to be the most profitable. | |