Modelling of ammonia emissions from naturally ventilated livestock buildings. Part 2: air change modelling

Bjerg, Bjarne and Liberati, Paolo and Marucci, Alvaro and Zhang, Guoqiang and Banhazi, Thomas and Bartzanas, Thomas and Cascone, Giovanni and Lee, In-Bok and Norton, Tomas (2013) Modelling of ammonia emissions from naturally ventilated livestock buildings. Part 2: air change modelling. Biosystems Engineering, 116 (3). pp. 246-258. ISSN 1537-5110

Abstract

This review shows the theoretical background for development of lumped ventilation models that can be integrated into models that aim to aid either design or operation of low emission naturally-ventilated buildings. The strength of lumped parameter modelling methods is that they have the potential to include effects of varying outdoor climate conditions, varying heat production from animals and the building design, which allow estimation of ventilation rate and indoor air temperature and humidity, with acceptable calculation times.With regard to design of low emission buildings, significant challenges still exist in reflecting the spatial distribution of ammonia emission surfaces and the influence of air velocity above these surfaces.In relation to operation of natural ventilation systems, it is obvious that lumped parameter methods have the potential to aid automatic control systems that aim to optimise the adjustment of automatically controlled openings for natural ventilation in a way that prevents over-ventilation and, thereby, minimises ammonia emission, without compromising indoor aerial conditions. It is also foreseen that lumped parameter methods have the potential to optimise opening adjustment and exhaust strategies in hybrid ventilation systems. In these contexts, ventilation is can be combined with a partial pit exhaust ventilation system which makes it possible to collect a significant fraction of the entire ammonia emission in a limited air stream. This may make it affordable to utilise air cleaning technologies in conjunction with naturally ventilated animal buildings.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2013 IAgrE. Permanent restricted access to Published version due to publisher copyright policy.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences
Date Deposited: 26 May 2014 01:47
Last Modified: 05 Jan 2015 06:16
Uncontrolled Keywords: ammonia emissions; exhaust ventilation system; hybrid ventilation system; indoor air temperature; livestock buildings; lumped parameter method; lumped parameter modelling; natural ventilation
Fields of Research : 07 Agricultural and Veterinary Sciences > 0701 Agriculture, Land and Farm Management > 070103 Agricultural Production Systems Simulation
07 Agricultural and Veterinary Sciences > 0702 Animal Production > 070203 Animal Management
09 Engineering > 0907 Environmental Engineering > 090701 Environmental Engineering Design
Socio-Economic Objective: D Environment > 96 Environment > 9601 Air Quality > 960199 Air Quality not elsewhere classified
Identification Number or DOI: 10.1016/j.biosystemseng.2013.01.010
URI: http://eprints.usq.edu.au/id/eprint/25244

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