DYNAMIC ANALYSIS OF TEMPERATURE AND HEAT GAINS IN CLASSROOMS WITH DIFFERENT TYPE OF WINDOWS

Abstract

Energy consumption in buildings, in schools as well, in Serbia and Montenegro is significantly higher than is defined in world's energy standards. Heating energy is the biggest part of total energy consumption in schools. Energy losses through the windows reach up to 40% of total energy for heating of building that points out the importance of economically usage and saving of energy. This paper presents one-week analysis of temperatures and heat gains for two classrooms with different type of windows. The analysis is performed by Design Builder software. Due to heat losses analyses continual measurements of ambient and outside temperatures with sampling time of one hour have been performed. The measurements were performed in two classrooms; in one classroom, there are old windows with wood frames, whereas in the other there are new PVC windows. The system for temperature measuring was realized based on microcontroller and a digital temperature sensor. Taking into account measured and simulation results, the relevant conclusions were performed regarding energy consumption efficiency for school buildings heating. This paper describes the results of a project "Usage of multiparameter simulation models for analyses energy efficiency behavior of typical school buildings", No 280200 Serbian Ministry of Science, by team from Technical faculty of Cacak, Serbia.

Keywords

Dates

  • Submission Date2006-08-05
  • Revision Date2006-10-15
  • Acceptance Date2006-12-01

References

  1. R. Krneta, M. Bjekic S. Dragicevic, Validation of Software Packet Design Builder for Building Energy Simulation, CD Proceedings of 14th International Expert Meeting Power Engineering, Maribor, May 10th to 12th 2005.
  2. R. Krneta, S. Dragicevic, M. Radovanovic, M. Bjekic, Energy Consumptation in Schools in Serbia - Review of Present State in Cacak Municipality, 35th International Congress on Air-Conditioning, Heating and Refrigerating, Belgrade, 1-3 December 2004, Scientific-professional Journal for Air-Conditioning, Heating and Refrigerating, No. 1, February 2005, pp 49-53
  3. S. Dragicevic, R. Krneta, M. Bjekic, The analyses of the possibility to increase energy efficiency in schools in Cacak municipality considering front-side windows, Proceedings of 36th International Congress on Air-Conditioning, Heating and Refrigating Belgrade, 30.11 - 2.12, 2005
  4. U.D.J. Gieseler, F.D. Heidt1, W. Bier, Combined Thermal Measurements and Simulation for the Detailed Analysis of Four Occupied Low-Energy Buildings, Eighth International IBPSA Conference, Eindhoven, Netherlands, and August 11-14, 2003
  5. R. Krneta, M. Bjekic S. Dragicevic, P. Petrovic, Computer Application for School Energy Building Performance, Proceedings of International Congress of Energy Efficiency and Renewable Energy Resources, Plovdiv, 13-15 April
  6. www.designbuilder.co.uk
  7. ASHRAE handbook, Fundamentals; 2001.
  8. Callahan M., Parker D., Dutton W., Energy Efficiency for Florida Educational Facilities: The 1996 Energy Survey of Florida Schools, Florida Solar Energy Center
  9. Evaluation of Energy-Efficiency Improvements to Portable Classrooms, Report of Florida Solar Energy Center, 1999. Florida Solar Energy Center Online Publications, http://www.fsec.ucf.edu/bldg/pubs/cr1133/index.htm
  10. Hensen, J.L.M. 1995, On System Simulation for Building Performance Evaluation, 4th IBPSA world Congress on Building Simulation '95, Int. Building Performance Simulation association, Madison, WI. Aug 1995, pp. 259-267
  11. http://www.eere.energy.gov/buildings/tools_directory/
  12. Hui, S. C. M., Simulation based design tools for energy efficient buildings in Hong Kong, Department of Architecture, University of Hong Kong, Hong Kong Papers in Design and Development, Vol. 1, 1998, pp. 40-46.
Volume 10, Issue 4, Pages219 -227