Application of urban passive cooling systems and design techniques in livestock buildings (original) (raw)
Related papers
Passive cooling systems in livestock buildings towards energy saving: A critical review
Energy and Buildings, 2019
This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Highlights Passive techniques and systems can reduce heat gains on livestock buildings Shading plays a major role on the cooling of livestock buildings Initial architecture design leads to energy conservation for cooling Natural ventilation decreases the temperature levels in a livestock structure Passive techniques in urban buildings might be suitable for livestock buildings
Optimal evaporative cooling system configuration for livestock building
2008
The efficiency of ventilation and evaporative cooling systems usually depend on the system configuration, air distribution and cattle layout. From a thermo-fluid dynamics point of view, local recirculation zones could be present, reducing significantly the advantages of evaporative cooling. Furthermore, while for hot and dry climates such advantages are in general quite evident, in Italy the temperate and moderately humid summers make uncertain the cost-benefits ratio. Previous results show that such systems are convenient even for temperate climates. In order to get an efficient implementation an optimal location of EC panels is required. From this point of view a double target is required: i) to reduce the indoor dry bulb temperature; ii) to keep low the increasing humidity due to the direct evaporative cooling effect.
EUREKA: Physics and Engineering, 2021
Pig farming is a sector of animal husbandry, the development of which is great attention. The pork market occupies a large share in the trade in animal products. In the conditions of they do competition more efforts are made to improve the quality and reduce the cost of production. To achieve this goal, work is being done in several areas – development and expansion of the gene pool, improvement of the living environment in the premises for animal husbandry, reduction of energy costs. Along with the development of feeding technologies, it is necessary to create a suitable microclimate in the premises, in which the animals to realize their productive potential, which in turn is directly related to the use of heating and cooling systems. The design of these systems for both existing and new buildings is carried out according to generally accepted methodologies, which in turn require time for calculation and use of specialized software. The methodologies for determining the loads for h...
Relation between energy use and indoor thermal environment in animal husbandry: a case study
E3S Web of Conferences
Climate control is of the foremost importance in structures for intensive animal rearing because many animals (e.g. pigs and broilers) tolerate a small range of climate conditions (mainly air temperature and relative humidity) that may differ considerably from the outdoor environment. For this reason, the indoor climate in the majority of structures for animal husbandry is guaranteed by HVAC systems. On the one hand, the use of mechanical systems makes it possible to avoid production risks due to the unpredictability of the outdoor weather conditions and to maximize the feed efficiency, with positive effects on both the animal welfare and farm profit. On the other hand, the use of HVAC entails not negligible thermal and electrical energy consumptions. In literature, few data about the real thermo-hygrometric conditions and energy consumption of animal houses are present. In this work (in the framework of the EPAnHaus – Energy Performance certification of Animal Houses –project), the...
Sustainability, 2021
Poultry are one of the most vulnerable species of its kind once the temperature-humidity nexus is explored. This is so because the broilers lack sweat glands as compared to humans and undergo panting process to mitigate their latent heat (moisture produced in the body) in the air. As a result, moisture production inside poultry house needs to be maintained to avoid any serious health and welfare complications. Several strategies such as compressor-based air-conditioning systems have been implemented worldwide to attenuate the heat stress in poultry, but these are not economical. Therefore, this study focuses on the development of low-cost and environmentally friendly improved evaporative cooling systems (DEC, IEC, MEC) from the viewpoint of heat stress in poultry houses. Thermodynamic analysis of these systems was carried out for the climatic conditions of Multan, Pakistan. The results appreciably controlled the environmental conditions which showed that for the months of April, May...
2017
The thermal performance of a greenhouse-type building provided with a living plant canopy was evaluated in Northern Italy during summer. Four reduced scale buildings with different types of covering were tested. The first type was the reproduction of a gable roof covered with 40 mm-thick sandwich panels (SAND), a widespread solution for dairy barns in temperate climates, used as control. Two roofs were reproductions of a Venlo-type greenhouse covered with a 0.2 mm-thick transparent EVA film equipped with either a reflective shading screen with 70% shading level (TRA+SHA) or with a living plant canopy (TRA+PLA). The last type of roof consisted of the living plant canopy alone (PLA). Plant canopies were made up of climbing plants (Trachelospermum jasminoides) with an average LAI of 1.39 m m. Data were analysed with mixed linear models for repeated measures. Fixed effects tested were roof type and the interaction of roof type and time of the day. Internal temperature in TRA+SHA (22.60 ...
Two-stage evaporative cooling for improving poultry housing environment in Algerian arid zones
DESALINATION AND WATER TREATMENT
The hot and dry climate of countries with arid and semi-arid zones is the main reason that poultry products are less available and more expensive than elsewhere. Investing in livestock in these regions requires the use of suitable cooling systems that humidifies the dry air and lowers its temperature. Thermal environment control in poultry houses is greatly recommended to ensure good productivity. In the present work, a cooling solution was proposed with very low energy consumption and that did not use harmful refrigerants, for economic, ecological, and sustainable farming. It consists of a two-stage indirect/direct evaporative cooling system that reduces the temperature and increases specific humidity to maintain animal comfort conditions inside the poultry house. Biskra City in Algeria with a hot and dry climate was employed as a case study. The evaporative cooling system used the outside air, for air circulation needs in the poultry houses.
Effect of temperature increase on cooling systems in livestock farms
Climate Research, 2010
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 socioeconomic 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.
Energy Use for Climate Control of Animal Houses: The State of the Art in Europe
Energy Procedia, 2016
Animal rearing is done into houses where heating, cooling, ventilation and lighting are adopted to control the indoor climate, however there are not reference values for the energy performance of such enclosures. In this paper, a first analysis on the energy use for climate control of animal houses that can be found in the technical and scientific literature is done for broilers, hens and pig houses, deriving reference energy use values that may be used for the benchmarking of the performance of these buildings.
Journal of Building Materials and Structures, 2018
The thermal performance of the roof is one of the most important factors for a comfortable environment. As 50% of the thermal loads received by a building come from the roof, this research seeks to find the roofing system that opposes the transmission of heat during the hottest days and promotes indoor thermal comfort. In this regard, this paper presents an experimental study carried out on four (04) testing cells constructed on a reduced scale and submitted to climatic external conditions. Three (03) cells were used to test passive cooling strategies through the roof, namely: the cool roof, ventilated roof and a roof with inverted earth pots. The fourth cell that served as cell-reference, for its part, a conventional roof. The experimentation concerned the types of roofs most used in residential buildings in Biskra, Algeria. The measurements process was effectuated in an exposed field during the month of July, prevailing the metrological data of the hot and arid climate. The obtain...