Passive cooling methods for energy efficient buildings with and without thermal energy storage

Topics: Heat transfer, HVAC, Heat Pages: 64 (17186 words) Published: March 26, 2014
Energy Education Science and Technology Part A: Energy Science and Research 2012 Volume (issues) 29(2): 913-946

Passive cooling methods for energy
efficient buildings with and without
thermal energy storage – A review
N. B. Geetha, R. Velraj*
Anna University, Institute for Energy Studies, College of Engineering, Chennai, India.

Contents
1. Introduction ……………………………………………………………………..914-915 2. Solar and heat protection techniques (Reduce heat gains)……………………...915-919 2.1. Microclimate………………………………………………………………..915-917 2.1.1. Vegetation…………………………………………………………..915-917 2.1.2. Water surfaces………………………………………………………917-917 2.2. Solar control…………………………………………………………………917-919 2.2.1. Aperture……………………………………………………………..917-918 2.2.2. Glazing………………………………………………………………918-919 2.2.3. Insulation…………………………………………………………….919-919 2.2.4. Shading………………………………………………………………919-919 3. Heat modulation or amortization technique (Modify heat gains)………………..919-926 3.1. Shifting of dayheat to night for removal……………………………………..920-924 3.1.1. Thermal mass in the construction material…………………………..920-920 3.1.2. Thermal mass using PCM based system……………………………..920-921 3.1.2.1. PCM in wallboards……………………………………………....921-922 3.1.2.2. PCM in ceiling & roof…………………………………………...922-923 3.1.2.3. PCM in glass windows…………………………………………..924-924 3.2. Use of night coolness for day cooling ……………………………………….924-926 4. Heat dissipation technique (Remove internal heat)……………………………….926-938 4.1. Natural ventilation……………………………………………………………926-932 4.1.1. Wind driven cross ventilation………………………………………...926-927 4.1.2. Buoyancy driven stack ventilation…………………………………....927-930 4.1.3. Single sided ventilation……………………………………………….930-932 4.2. Natural cooling………………………………………………………………..932-938 4.2.1. Evaporative cooling…………………………………………………...932-932 4.2.2. Ground cooling………………………………………………………..933-936 4.2.3. Radiative cooling……………………………………………………...934-936 4.2.4. Heat dissipation through combined cooling principles………………..936-936 4.3. PCM based external storage system for free cooling……………………….....936-938 5. Conclusion………………………………………………………………………….938-938 _________________



Corresponding author: Tel: +91-442-235-8051; fax: +91-442-235-1991. E-mail address: velrajr@gmail.com, geethailaval@gmail.com (R. Velraj).

914

N. B. Geetha, R. Velraj / EEST Part A: Energy Science and Research

29

(2012)

913-946

Received: 07 August 2011; accepted: 10 October 2011

Abstract
This paper reviews the various possible methods of passive cooling for buildings and discusses the representative applications of each method. Passive cooling techniques are closely linked to the thermal comfort of the occupants, and it is possible to achieve this comfort by reducing the heat gains, thermal moderation and removing the internal heat. In the present review the various methods adopted under these techniques and the relevant information about the performance of each method reported by various researchers, are collected and presented in detail.

Keywords: Energy efficient buildings; Solar control; Passive cooling; Natural ventilation; Thermal storage; Free cooling; Phase change materials

©Sila Science. All Rights Reserved.
1. Introduction
Cooling is the transfer of energy from a space or from the air, to a space, in order to achieve a lower temperature than that of the natural surroundings. In recent years, air conditioning systems are used to control the temperature, moisture content, circulation and purity of the air within a space, in order to achieve the desired effects for the occupants. The shortage of conventional energy sources and escalating energy costs have caused the re-examination of the general design practices and applications of air conditioning systems and the development of new technologies and processes for achieving comfort conditions in buildings by natural means. In recent years, the rapid economical growth in some of the thickly populated nations has stimulated the utilization of...

References: [4] Liu K, Baskaran B. Thermal performance of green roofs through field evaluation, National Research
Council of Canada Report NRCC-46412, 2003, Ottawa.
N. B. Geetha, R. Velraj / EEST Part A: Energy Science and Research 29 (2012)
913-946
[15] Goldn J, Kaloush K. Alternative pavements ease urban-heat effect, 2007. Retrieved on October 12,
2009 from: http://sos.asu.edu/news/greentalk/alternativepavements- ease-urban-heat-effect.
[16] Mazria E. Passive Solar Energy Book. Rodale Press, Emmaus, Pa. 1979.
Uppsala, Sweden, 2000.
misura. 2007 [in Italian].
29
(2012)
[36] Clarke JA. Energy Simulation in Building Design, Butterworth Heinmann, Oxford, GB, 2001.
Continue Reading

Please join StudyMode to read the full document

You May Also Find These Documents Helpful

  • Renewable Energy; Solar Thermal Energy Essay
  • Thermal Energy Storage Essay
  • Essay about ENERGY EFFICIENT BUILDINGS
  • Energy Efficient House Essay
  • Essay about Energy Efficient Buildings
  • Energy sources Essay
  • Energy Essay
  • ENERGY Essay

Become a StudyMode Member

Sign Up - It's Free