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Hygrothermal study of dwelling submitted to passive cooling

A significant portion of energy consumed in buildings is due to energy usage by heating, ventilation, and air conditioning (HVAC) systems. Free cooling is a good option for energy savings in (HVAC) systems. In recent years, scientists, engineers, and architects designed successful and innovative buildings which use passive cooling techniques, such as natural ventilation. The house studied in the present work, is a pilot project undertaken jointly by the Centre for Development of Renewable Energies (CDER) and the National Centre for Studies and Research of the integrated building (CNERIB) in the framework of the MED-ENEC project (Mediterranean Energy Efficiency in Construction structure). The house under consideration has a surface area of 65 m² and is located in the region of Algiers which characterized by a Mediterranean climate with relatively mild winters and a hot and humid summer. The aim of this work is to study the thermal comfort inside the house in summer without air conditioning systems, only ventilation is considered. The aim of this work is to study the effect of natural ventilation on both thermal and hygrometric comfort inside the house during the summer period. Numerical simulation is made using the TRNSYS software and the results obtained are in good agreement with measured values. The prototype home is designed in a way that natural ventilation allows thermal comfort which induced energy saving from air conditioning. The mean temperature measured in the interior of the house is 26 ° C. The relative humidity reaches about 70% in August. Thermal comfort is related to relative humidity that are the essential parameters of the feeling of comfort. Humidity is an important parameter in thermal comfort, it is why we can conclude that we have reached a relatively good hygrothermal comfort.
PAPER REVISED: 2016-04-04
PAPER ACCEPTED: 2016-11-16
  1. . Pérez-Lombard L, Ortiz J, Pout C. A review on buildings energy consumption information. Energy and Buildings, Issue3 (2008), Volume 40: Pages 394-398.
  2. Davì L, Giampaglia C. First medlink report: a crossed look on reports and international statistics about development, gender, freedom, conflicts and mobility in Mediterraneum (2007),
  3. Howard L. The climate of London. vol. I-III, Harvey and Dorton 1833, London .
  4. Landsberg H.E .The Urban Climate, in: International Geographic Series 1981, vol. 28; Academic Press, New York.
  5. Takebayashi H, Moriyama M. Surface heat budget on green roof and high reflection roof for mitigation of urban heat island. Building and Environment, 42 (8) (2007) : pp. 2971-2979.
  6. Kolokotroni M, Giannitsaris I, Watkins R. The effect of the London urban heat island on building summer cooling demand and night ventilation strategies. Solar Energy, 80 (4) (2006):pp. 383-392.
  7. Santamouris M. Heat island research in Europe — the state of the art. Advances Building Energy Research ,1 (2007): pp.23-150.
  8. Taha H, Chang S.C, Akbari H. Meteorological and air quality impacts of heat island mitigation measures in three U.S. Cities. Lawrence Berkeley National Laboratory Report (2000); LBNL- 44222, Berkeley, CA.
  9. Imhoff M.L, Zhang P, Wolfe R.E, Bounoua L. Remote sensing of the urban heat island effect across biomes in the continental USA, Remote Sensing of Environment (2010);114: pp.504-513.
  10. Montavez J.P, Rodriguez A, Jimenez J.I. A study of the urban heat island of Granada. International Journal of Climatology (2000); 20: pp.899-911.
  11. Confederation of International Contractors' Associations 2002. Ed., Industry as a partner for sustainable development-Construction. UNEP,
  12. The State of the World Cities 2001. UN-HABITAT.
  13. Gilbert A, Cairncross S, Hardoy J.E, Satterthwaite D. The poor die young housing and health in third world cities. The Geographical Journal (1990); 158: (2) 234.
  14. Hardoy J, Mitlin D, Satterthwaite D. Environmental problems in an urbanizing world. Earthscan (2001); 19: (2) 188.
  15. Imessad K, Derradji L, Ait Messaoudene N, Mokhtari F, Chenak. A, Kharchi R. Impact of passive cooling techniques on energy demand for residential buildings in a Mediterranean climate. Renewable Energy (2014); 71: pp.589-597.
  16. Pfafferott J, Herkel S, Jäschke M. Design of passive cooling by night ventilation: evaluation of a parametric model and building simulation with measurements. Energy and Buildings (2003); 35: 1129-1143.
  17. Ramponi R, Gaetani I, Angelotti A. Influence of the urban environment on the effectiveness of natural night-ventilation of an office building. Energy and Buildings (2014); 78: 25-34.
  18. Santamouris M, Kolokotsab D .Passive cooling dissipation techniques for buildings and other structures: The state of the art. Energy and Buildings (2013); 57: 74-94.
  19. Zhang Rp, Nie Y, Lam KP, Biegler LT .Dynamic optimization based integrated operation strategy design for passive cooling ventilation and active building air conditioning. Energy and Buildings (2014); 85: 126-135.
  20. D. Medjelakh, S. Abdou , « Impact of the thermal inertia of the hygrothermal comfort and energy consumption of the building »
  21. DTR C3-2, Thermal regulation of residential buildings and calculating methods for determining building heat losses. Algiers: CNERIB;
  22. DTR C3-4, Air conditioning and calculating methods for determining building heat gains. Algiers: CNERIB;
  23. TRABELSI A, Belarbi R, QIN M. Transferts couplés de chaleur et d'humidité dans les bâtiments climatisés., Congrès SFT09, 2009.
  24. R.Kharchi and Al, "Analysis Of Hygrothermal Comfort In A Pilot House In Algiers", International Conference on Energy Systems Istanbul 2015 - ICES'15, 23-25 December 2015, Yildiz Technical University, Istanbul, Turkey.
  25. TRNSYS 17, a TRaNsient SYstem Simulation software TRNSYS.