Reducing the Cooling Energy of Existing Commercial Buildings with Passive Thermal Mass
Keywords:Night cooling, facades, low energy, passive thermal mass.
A major part of sustainability theory and practice is to reuse existing building stock wherever possible and to refrain from demolition and rebuilding minimising the resources and associated energy used. Many buildings therefore have internal refurbishments during their lives, the scale of which can range from minor fit outs through major interior refurbishments to finally those which see the central services replaced also. The ability to greatly improve the efficiency of a building during only minor refurbishment is an attractive proposal which would provide an intermediate opportunity to building owners to reduce cooling energy and its associated cost and more importantly avoid disruption to the base building services. This study investigates the effect of exploiting inherent building thermal mass in a standard commercial building in the Australian cities of Adelaide and Brisbane, and demonstrates the energy savings that can be made in the order of 30%.
Artmann N, Manz H and Heiselberg P. Climatic potential for passive cooling of buildings by night-time ventilation in Europe. Applied Energy 2007; 84(2): 187-201. https://doi.org/10.1016/j.apenergy.2006.05.004
Givoni B. Effectiveness of mass and night ventilation in lowering the indoor daytime temperatures. Energy and Buildings 1998; 28(1998): 25-32. https://doi.org/10.1016/S0378-7788(97)00056-X
Shaviv E. Thermal mass and night ventilation as passive cooling design strategy. Renewable Energy 2001; 24(3-4): 445. https://doi.org/10.1016/S0960-1481(01)00027-1
Koranteng C and Mahdavi A. An investigation into the thermal performance of office buildings in Ghana. Energy and Buildings 2011; 43(2-3): 555-563. https://doi.org/10.1016/j.enbuild.2010.10.021
Güçyeter B and Günaydın HM. Optimization of an envelope retrofit strategy for an existing office building. Energy and Buildings 2012; 55(0): 647-659. https://doi.org/10.1016/j.enbuild.2012.09.031
Brown M. Optimization of thermal mass in commercial building applications. Journal of solar energy engineering 1990; 112: 273. https://doi.org/10.1115/1.2929934
Zhou G, Krarti M and Henze G. Parametric analysis of active and passive building thermal storage utilization. Journal of solar energy engineering 2005; 127: 37. https://doi.org/10.1115/1.1824110
Roach P, Bruno F and Belusko M. Modelling the cooling energy of night ventilation and economiser strategies on façade selection of commercial buildings. Energy and Buildings 2013; 66(0): 562-570. https://doi.org/10.1016/j.enbuild.2013.06.034
Baldwin R, et al. BREEAM (Building Research Establishment Environmental Assessment Method) 98 for offices. Watford, UK, 1998.
ABCB. Building Code of Australia (2007 edn). Canberra 2007.
ABCB, Definition Of Basic Forms For Representative Buildings 1991: p. 5.
Kontoleon K and Bikas D. Modeling the influence of glazed openings percentage and type of glazing on the thermal zone behavior. Energy and Buildings 2002; 34(4): 389-399. https://doi.org/10.1016/S0378-7788(01)00125-6
Kossecka E and Kosny J. Equivalent wall as a dynamic model of a complex thermal structure. Journal of Building Physics 1997; 20(3): 249. https://doi.org/10.1177/109719639702000306
Kossecka E and Kosny J. Effect of insulation and mass distribution in exterior walls on dynamic thermal performance of whole buildings. Thermal performance of the exterior envelopes of buildings VII 1998: p. 721-731.
Perez-Lombard L, Ortiz J and Maestre IR. The map of energy flow in HVAC systems. Applied Energy 2011; 88(12): 5020-5031. https://doi.org/10.1016/j.apenergy.2011.07.003
Nassif N. Performance analysis of supply and return fans for HVAC systems under different operating strategies of economizer dampers. Energy and Buildings 2010; 42(7): 1026-1037. https://doi.org/10.1016/j.enbuild.2010.01.015
Tsilingiris P. Parametric space distribution effects of wall heat capacity and thermal resistance on the dynamic thermal behavior of walls and structures. Energy and Buildings 2006; 38(10): 1200-1211. https://doi.org/10.1016/j.enbuild.2006.02.007
Antonopoulos K. Envelope and indoor thermal capacitance of buildings. Applied Thermal Engineering 1999; 19(7): 743. https://doi.org/10.1016/S1359-4311(98)00080-5
Al-Homoud M. Optimum thermal design of office buildings. International Journal of Energy Research 1998; 21(10): 941-957. https://doi.org/10.1002/(SICI)1099- 114X(199708)21:10<941::AID-ER302>3.0.CO;2-Y