1. bookVolume 8 (2018): Issue 1 (May 2018)
Journal Details
License
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Journal
First Published
30 Jun 2015
Publication timeframe
2 times per year
Languages
English
access type Open Access

Air Exchange Rate in Air Quality Assurance – A Case Study

Published Online: 20 Aug 2018
Page range: 13 - 18
Received: 20 Feb 2018
Accepted: 28 Feb 2018
Journal Details
License
Format
Journal
First Published
30 Jun 2015
Publication timeframe
2 times per year
Languages
English

The goals of this paper are to estimate some parameters – indoor temperature and ventilation rate - necessary to determine the heat load demand for ventilation in the amphitheatre named ‘A TALPOSI’-Faculty of Buildings Engineering- with a number of at the most 120 occupants. The study presented in this paper is made when in the amphitheatre it is necessary to assure a comfortable temperature by a permanent functioning of the heating system. The number of air exchanges necessary in the amphitheatre in the natural ventilation process, more exactly, to assure a minimum air exchanges, is imposed by the requirements for the assurance of physiologic comfort in the amphitheatre for the time interval when it is occupied by students. The inner air debit should cover the harmful emissions in the amphitheatre. By the help of these calculated (measured) parameters we have calculated the heat load for ventilation. In the end, with the data obtained from calculations and measurements we find ourselves in the situation of establishing the size of the heat exchanger corresponding to the room, to heat the fresh air taken from outside and send it inside the amphitheatre. The measurements are made with the TESTO apparatus of the faculty. The minimum requirements to assure the thermal comfort are: to achieve a minimum internal temperature θi (t) higher than (or equal to) the normal indoor temperature associated to this space and to assure the air quality, the air exchange rate. The authors want to highlight by this study the necessity and importance of the control on the number of air exchanges in rooms with a high number of occupants and overall, the control of the fresh air debits. The fact that the focus is more and more on heat loss cuts in rooms by tightening closing elements gives birth to the necessity of control of the ventilation system with effects on the consumption of mechanical energy.

Keywords

Busch, J.F., 1992. Comfort in air-conditioned and naturally ventilated offices in Thailand, Energy and Buildings 18 (3-4) 235-249.Search in Google Scholar

N. Bernardi, D.C.C.K. Kowaltowski, 2006. Environmental comfort in school buildings: A case study of awareness and participation of users Environment and Behavior, 38 (2), pp. 155-172.Search in Google Scholar

Chen, Q., 2009. Ventilation performance prediction for buildings: a method overview and recent applications, Building and Environment, 2009, Vol.44, N.4, pp.848 858.Search in Google Scholar

Catalina, T., & Iordache, V., 2012. IEQ assessment on schools in the design stage. Building andEnvironment, 49, 129-140.Search in Google Scholar

Constantinescu D. Caracaș G., 2014. Analizarea regimului higrotermic și determinarea necesarului de căldură de calcul al cladirilor rar încalzite (Analyzing the hygrothermal regime and determining the heating heat exchanger of the buildings that are rare heated). Conferința Instalații pentru construcții și economia de energie, Iasi 3-4 iulie 2014, 42-61.Search in Google Scholar

D.A. Coley, R. Greeves, B.K. Saxby, 2007. The effect of low ventilation rates on the cognitive function of a primary school class International Journal of Ventilation, 6 (2), pp. 107-112.Search in Google Scholar

Dascalaki E., Santamouris M. et. al., 1995. Predicting Single Sided Natural Ventilation Rates in Buildings, Solar Energy, Vol. 55, No.5, pp.327 341.Search in Google Scholar

E.G. Dascalaki, V.G. Sermpetzoglou, 2011. Energy performance and indoor environmental quality in Hellenic schools Energy and Buildings, 43 (2), pp. 718-727.Search in Google Scholar

Energy Information Administration, 1995. State Energy Data Report 1995, Tables 3 through 7, ldura.Search in Google Scholar

EN 7730 ISO, 2005. Moderate Thermal Environment - Determination of the PMV and PPD Indices and Specification of the Conditions for Thermal Comfort, International Organization for Standardization, Geneva.Search in Google Scholar

Huang, Y. C., Chu, C. L., Lee, S. N. C., Lan, S. J., Hsieh, C. H., & Hsieh, Y. P., 2013. Building users’ perceptions of importance of indoor environmental quality in long-term care facilities. Building and Environment, 67, 224-230.Search in Google Scholar

Sarbu, I., & Sebarchievici, C., 2013. Aspects of indoor environmental quality assessment in buildings. Energy and buildings, 60, 410-419.Search in Google Scholar

M. Santamouris, A. Synnefa, M. Asssimakopoulos, I. Livada, K Pavlou, M. Papaglastra, et al., 2008. Experimental investigation of the air flow and indoor carbon dioxide concentration in classrooms with intermittent natural ventilation Energy and Buildings, 40 (10), pp. 1833-1843.Search in Google Scholar

Toftum J., 2010. Central automatic control or distribute the occupant control for better indoor environment quality in the future. Building and environment, 45(1), 23-28.Search in Google Scholar

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