Abstract
Most of the modern air-conditioned buildings have a low fresh air supply to reduce energy consumption. This results in a poor indoor air quality (IAQ) and a 30–200% higher sick building syndrome than that of a naturally ventilated building. Alternatively, energy-efficient and eco-friendly earth air tunnel system (EATS) provides a good IAQ because of the sufficient fresh air supply. This paper presents the cooling performance and IAQ characteristics of a sparsely occupied building supported with an EATS. The building was monitored for the concentration of fine and coarse particulate matter (PM), carbon dioxide (CO2) and carbon monoxide (CO), temperature distribution and relative humidity (RH) in September and October 2012. The average PM10, PM2.5 and PM1 concentrations were 6.77, 6.11 and 3.17 μg/m3 respectively when the EATS was operated. These are marginally higher compared to that when the EATS was not operated. The average indoor CO2 level, air temperature and RH were 418 ppm, 26.5 °C and 58.2% respectively when the EATS was operated. The diurnal indoor CO2 trend relates well with photosynthetic and anthropogenic activities in and around the building. The CO2 and PM concentrations correlate well with indoor air temperature and RH with a time lag.
Similar content being viewed by others
Abbreviations
- C :
-
Indoor concentration of contaminant at any given time (m3/m3)
- C i :
-
Initial concentration of contaminant in the room (m3/m3)
- Cov :
-
Covariance (*)
- C s :
-
Concentration of contaminant in the supply air (m3/m3)
- E :
-
Expectation (*)
- n :
-
Number of air changes per unit time (–)
- Q :
-
Volume of room (m3)
- \( \dot{Q}_{\text{cp}} \) :
-
Rate of volumetric contaminant generation (m3/h)
- t :
-
Time (h)
- x, y :
-
Variables (*)
- µ :
-
Mean (*)
- ρ :
-
Correlation coefficient (–)
- σ :
-
Standard deviation (*)
- *:
-
Units vary based on the unit of variable(s)
References
M.S. Hatamipour and A. Abedi, Passive cooling systems in buildings: some useful experiences from ancient architecture for natural cooling in a hot and humid region, Energy Conversion and Management, 49 (2008) 2317–2323.
L.P. Lombard, J. Ortiz and C. Pout, A review on buildings energy consumption information, Energy and Buildings, 40 (2008) 394–398.
J.K. Nayak and J.A. Prajapati, Handbook on energy conscious buildings, 1st edn, Energy Centre-Ministry of Non-conventional Energy Sources (2006).
W. Fisk, How IEQ affects health, productivity, ASHRAE Journal, 44 (2002) 56–60.
P. Wargocki, Productivity and health effects of high indoor air quality, In Encyclopedia of environmental health, Elsevier, 2011.
O. Seppanen and W.J. Fisk, Association of ventilation system type with SBS symptoms in office workers, Indoor Air, 12 (2002) 98–112.
A.L. Richards, K.C. Hyams, D.M. Watts, P.J. Rozmajzl, J.N. Woody and B.R. Merrell, Respiratory disease among military personnel in Saudi Arabia during Operation Desert Shield, American Journal of Public Health, 83 (1993) 1326–1329.
N.H. Wong and B. Huang, Comparative study of the indoor air quality of naturally ventilated and air-conditioned bedrooms of residential buildings in Singapore, Building and Environment, 39 (2004) 1115–1123.
D.M. Warshauer, E.C. Dick, A.D. Mandel, T.C. Flynn and R.S. Jerde, Rhinovirus infections in an isolated Antarctic station, transmission of the viruses and susceptibility of the population, American Journal Epidemiology, 129 (1989) 319–340.
D.K. Milton, P.M. Glencross and M.D. Walters, Risk of sick leave associated without door ventilation level, humidification, and building related complaints, Indoor Air, 10 (2000) 212–221.
New York State Commission on Ventilation, The prevalence of respiratory diseases among children in schoolrooms ventilated by various methods. In Ventilation: Report of the New York State Commission on Ventilation, Dutton and Co (1923).
R. Kosonen and F. Tan, The effect of perceived indoor air quality on productivity loss, Energy and Buildings, 36 (2004) 981–986.
K.W.D. Cheong and H.Y.T. Lau, Development and application of an indoor air quality audit to an air-conditioned tertiary institutional building in the tropics, Building and Environment, 38 (2003) 605–616.
C.A. Balaras, E. Dascalaki and A. Gaglia, HVAC and indoor thermal conditions in hospital operation rooms, Energy and Buildings, 39 (2007) 454–470.
S.C. Sekhar and C.S. Ching, Indoor air quality and thermal comfort studies of an under-floor air-conditioning system in the tropics, Energy and Buildings, 34 (2002) 431–444.
J. Lund, B. Sanner, L. Rybach, G. Curtis and G. Hellstrom, Geothermal (ground-source) heat pumps—a world overview. GHC Bulletin, September (2004), 1–10.
O. Leyla and O. Onder, An experimental study of the exergetic performance of an underground air tunnel system for greenhouse cooling, Renewable Energy, 35 (2010) 2804–2811.
G. Sharan and R. Jadhav, Performance of single pass earth-tube heat exchanger: an experimental study, Journal of Agricultural Engineering, 40 (2003) 1–8.
S. Diaz-Mendez, C. Patio-Carachure, J. Herrera-Castillo, Reducing the energy consumption of an earth-air heat exchanger with a PID control system, Energy Conversion and Management, 77 (2014) 1–6.
U. Eicker and C. Vorschulze, Potential of geothermal heat exchangers for office building climatisation, Renewable Energy, 34 (2009) 1126–1133.
A. Mathur, S. Mathur, G.D. Agrawal and J. Mathur, Comparative study of straight and spiral earth air tunnel heat exchanger system operated in cooling and heating modes, Renewable Energy, 108 (2017) 474–487.
N.A.S. Elminshawy, F.R. Siddiqui, Q.U. Farooq and M.F. Addas, Experimental investigation on the performance of earth-air pipe heat exchanger for different soil compaction levels, Applied Thermal Engineering, 124 (2017) 1319–1327.
R.N. Bhattarai, S.K. Mishra and P. Basnyat, Use of earth air tunnel HVAC system in minimizing indoor air pollution, Better air quality, Agra, India, 2004.
A. Chel and G.N. Tiwari, Performance evaluation and life cycle cost analysis of earth to air heat exchanger integrated with adobe building for New Delhi composite climate, Energy and Building, 41 (2009) 56–66.
C. Seethala, G. Pandithurai, J.D. Fast, S.D. Polade, M.S. Reddy and S.E. Peckham, Evaluating WRF-chem multi-scale model in simulating aerosol radiative properties over the tropics—a case study over India, Mapan, Journal of Metrology Society of India, 26 (2011) 269–284.
A.V. Baughman and E.A. Arens, Indoor humidity and human health—part I: literature review of health effects of humidity-influenced indoor pollutants, ASHRAE Transactions, 102 (1996) 193–211.
P. Wolkoff and S.K. Kjaergaard, The dichotomy of relative humidity on indoor air quality, Environment International, 33 (2007) 850–857.
D. Saikia, U. Sarma and P.K. Boruah, Development of an online heat index measurement system for thermal comfort determination, Mapan. Journal of Metrology Society of India, 29 (2013) 67–72.
Weather Underground. Weather History, http://www.wunderground.com. Retrieved February 23, 2015.
D. Martuzevicius, S.A. Grinshpun, T. Lee, S. Hu, P. Biswas, T. Reponen and L. Grace, Traffic related PM2.5 aerosol in residential houses located near major highways: indoor versus outdoor concentrations, Atmospheric Environment, 42 (2008) 6575–6585.
V.S. Chithra and S.M.S. Nagendra, Indoor air quality investigations in a naturally ventilated school building located close to an urban roadway in Chennai, India, Building and Environment, 54 (2012) 159–1567.
L. Morawska, S. Thomas, W. Hofmsnn, Z. Ristovski, M. Jamriska, T. Rettenmoser and S. Kagerer, Exploratory cross-sectional investigations on ambient sub micrometer particles in Salzburg, Austria, Atmospheric Environment, 21 (2004) 3529–3533.
S. Gupta, M. Khare and R. Goyal, Sick building syndrome—a case study in a multistory centrally air-conditioned building in the Delhi City, Building and Environment, 42 (2007) 2797–2809.
H. Fromme, D. Twardella, S. Dietrich, D. Heitmann, R. Schierl, B. Liebl and H. Ruden, Particulate matter in the indoor air of classrooms-exploratory results from Munich and surrounding area, Atmospheric Environment, 41 (2007) 854–886.
Acknowledgements
The authors thank Indian Society of Heating Refrigerating and Air Conditioning Engineers (ISHRAE), Bangalore International Exhibition Centre and M/s. Rehau Polymers Pvt. Ltd. for their help in carrying out this study.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Leo Samuel, D.G., Shiva Nagendra, S.M. & Maiya, M.P. Cooling Performance and Indoor Air Quality Characteristics of an Earth Air Tunnel Cooled Building. MAPAN 33, 147–158 (2018). https://doi.org/10.1007/s12647-017-0243-3
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12647-017-0243-3