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Two-pipe chilled beam system for both cooling and heating of office buildings.

Number: pap. n. 159

Author(s) : AFSHARI A., NOROUZI R. G., HULTMARK G., et al.

Summary

Simulations were performed to compare a conventional 4-pipe chilled beam system and a 2-pipe chilled beam system. The objective was to establish requirements, possibilities and limitations for a well-functioning 2-pipe chilled beam system for both cooling and heating of office buildings. The building model had a net volume of 3669 m3, (L*B: 25.5m*11.5 m) and net ceiling height of 2.55 m. The building model was assumed to consist of 78 office rooms, 6 meeting rooms and 5 corridors with a 50% occupancy. Simulations were executed using Bsim, an energy simulation program, to calculate the energy consumption and hence energy savings in the 2-pipe chilled beam system in comparison with the 4-pipe system. The 2-pipe chilled beam system used high temperature cooling and low temperature heating with a water temperature of 20°C to 23°C, available for free most of the year. The system can thus take advantage of renewable energy. The results showed that the energy consumption was 3% less in the 2-pipe chilled beam system in comparison with the conventional 4-pipe system when moving cooled and heated water through the building, transferring the energy to where it is needed. Using free cooling (taking advantage of low external air temperature for cooling), together with transfer of energy, the energy consumption in the 2-pipe system was 5 % to 18% less in comparison with the 4-pipe chilled beam system. The energy savings from cooling alone ranged from 5 % to 60 %.

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Pages: 11 p.

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Details

  • Original title: Two-pipe chilled beam system for both cooling and heating of office buildings.
  • Record ID : 30008751
  • Languages: English
  • Source: Clima 2013. 11th REHVA World Congress and 8th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings.
  • Publication date: 2013/06/16

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