Steady-state balance model to calculate the indoor climate of livestock buildings, demonstrated for finishing pigs

Schauberger, Günther; Piringer, Martin; Petz, E.

doi:10.1007/s004840050002

Cited by 58 publications

(42 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This model was also able to calculate the moisture mass balance for buildings with controlled ventilation. Similarly, Schauberger et al (2000) used a steady-state balance model involving sensible and latent heat exchanges to assess the indoor climate and air quality. Thus, the usefulness of heat balance models has been largely proven in the design of environmental control methods (Schauberger et al 2000).…”

Section: Steady-state Balance Modelmentioning

confidence: 99%

See 1 more Smart Citation

Effect of temperature increase on cooling systems in livestock farms

Valiño¹,

Perdigones²,

Iglesias³

et al. 2010

Clim. Res.

View full text Add to dashboard Cite

We developed a methodology to evaluate the changes in cooling technologies of agricultural buildings derived from different scenarios of global climate change. Four 2080s scenarios were analysed for 6 European locations, using as a case study fattening pig farms and 3 cooling technologies: natural and forced ventilation, and cooling pads. The climate scenarios were constructed as a combination of general circulation models (Had CM2 and ECHAM4) downscaled for Europe with the HIRHAM and RCA3 regional models and driven by the A2 and B2 socio-economic scenarios. A steady-state heat balance model was used for the energy analysis in the livestock farms. The results showed that no changes in cooling technologies are necessary in the Mediterranean Basin; cooling pads were efficient enough for adequate climatisation both in the present and future scenarios. In northern European locations results were different, depending on the future scenario. Most scenarios indicated that cooling pads will be needed in fattening pig farms in the 2080s, while ventilation is efficient enough in the present scenario. The economic consequences will be important, as the costs associated with cooling pads are much higher than the costs of natural or forced ventilation.

show abstract

Section: Steady-state Balance Modelmentioning

confidence: 99%

“…During the winter, the ventilation rate is determined by the requirement of maintaining air quality, while during the summer the removal of excess heat determines the rate (Schauberger et al 2000, CIGR 2006. Natural ventilation relies on structural openings that allow airflow as a result of convective forces.…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature increase on cooling systems in livestock farms

Valiño¹,

Perdigones²,

Iglesias³

et al. 2010

Clim. Res.

View full text Add to dashboard Cite

show abstract

“…Therefore, by adjusting airflow rate, it is possible to obtain a T, RH, and gas concentration suitable for the birds (Schauberger et al, 2000). However, the relationship between differential pressure (the variable used for inlet slot adjustment) and air velocity in the zone occupied by the birds is uncertain, and has not been studied sufficiently in previous works.…”

Section: Introductionmentioning

confidence: 99%

Differential pressure as a control parameter for ventilation in poultry houses: effect on air velocity in the zone occupied by animals

Blanes-Vidal

Fitas

Torres

2007

Span. j. agric. res.

View full text Add to dashboard Cite

Differential pressure between indoor and outdoor air is the parameter most commonly used to adjust the opening of inlets in mechanically ventilated poultry houses, to get a suitable air velocity at the animals' level. The aim of this work was to measure and statistically analyse the influence of differential pressure on the indoor air velocity at different locations of a transverse section of a typical broiler house. The results showed that the pressure difference (20, 30, 38 and 45 Pa) had no significant effect (p >/= 0.05) on indoor air velocity at the animals' level. The work showed that, in all cases tested, the air velocity at level of the animals was significantly higher (p < 0.001) at the centreline of the building (1.31 m sE-1) than at points located 1.5 m from the walls (0.32 m sE-1). These results question the efficacy of using differential pressure measurement as a sole control parameter of air velocity over the broiler chickens, and reveals that ventilation system design and the way it is operated over summer in this typical poultry house may not be appropriate for poultry farms in hot and humid climates, as it does not provide high and uniform air velocities at level of the birds.

show abstract

“…The corresponding odour flow in OU/m³ is assessed by a simple model for odour release described by Schauberger et al (1999Schauberger et al ( & 2000b. The chosen system parameters typical for a livestock building in middle Europe (Schauberger et al, 1995) can be found in detail in Schauberger et al (2001b and2002).…”

Section: Short Description Of the Aodmmentioning

confidence: 99%

“…The calculation of odour release is based on a steady-state balance of the sensible heat flux, used to calculate the indoor temperature, and the ventilation rate of the livestock unit (Schauberger et al, 2000b). The corresponding odour flow in OU/m³ is assessed by a simple model for odour release described by Schauberger et al (1999Schauberger et al ( & 2000b.…”

Section: Short Description Of the Aodmmentioning

confidence: 99%

A Comparison of Odour Complaint Statistics With Model Calculations of Odour Episodes

Schauberger¹,

Piringer²,

Petz³

2006

proc water environ fed

View full text Add to dashboard Cite

The Austrian odour dispersion model (AODM) is a Gaussian model suitable for the prediction of ambient odour concentrations. Based on cumulative frequency distributions of calculated odour concentrations at receptor points, separation distances are obtained defined by odour impact criteria chosen as a combination of odour threshold and probability of threshold exceedance. At these separation distances, depending on the wind direction, the occurrence of odour sensation is analysed and compared with the well-known time pattern of the complaint statistics for odour.Here, the AODM is used to calculate separation distances for an odour threshold of 1 odour unit (OU) per cubic metre exceeded in 3% of the year. At a site in the Austrian North-alpine foreland, direction-dependent separation distances for a 1000 head pig unit (calculated on the basis of a two-year time series of meteorological data) lie between 99 m for northerly winds and 362 m for westerly winds. For these directiondependent separation distances we analysed when odour sensation can be expected in relation to meteorological parameters as well time of the day and year. For the main wind directions, West and East, odour sensation can be expected more often for higher wind velocities and a neutrally or stably stratified atmosphere around sunset. North and South winds show the typical diurnal variation of a local valley wind system with predominantly northerly daytime up-valley and southerly night-time down-valley winds. Odour sensation is therefore most likely around noon for North wind and during night time for South wind. This time pattern of the calculated odour sensation doesn't fit to the time pattern of the complaint statistics which shows complaints to occur predominantly in the afternoon and evening hours of the warm season when residents are outside. The presented comparison of odour complaint statistics with the calculated odour episodes is a helpful tool to find out when odour is perceived as most annoying. As a result, the evaluation of these values by the odour impact criteria should not only be based on statistical limits as it is done today but also by considering the annoying potential of odour due to the behaviour of the neighbours. Therefore the odour episode should be weighted by the time of the day and time of the year, as is done with the limit values for noise.

show abstract

Steady-state balance model to calculate the indoor climate of livestock buildings, demonstrated for finishing pigs

Cited by 58 publications

References 9 publications

Effect of temperature increase on cooling systems in livestock farms

Effect of temperature increase on cooling systems in livestock farms

Differential pressure as a control parameter for ventilation in poultry houses: effect on air velocity in the zone occupied by animals

A Comparison of Odour Complaint Statistics With Model Calculations of Odour Episodes

Contact Info

Product

Resources

About