Academic literature on the topic 'Sweat Evaporation'

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Journal articles on the topic "Sweat Evaporation"

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Guan, Manhao, Simon Annaheim, Martin Camenzind, et al. "Moisture transfer of the clothing–human body system during continuous sweating under radiant heat." Textile Research Journal 89, no. 21-22 (2019): 4537–53. http://dx.doi.org/10.1177/0040517519835767.

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Mass transfer due to perspired moisture in a clothing system is critical for the understanding of thermo-physiology and thermal protection of a clothed body. Previous studies usually investigated moisture transfer without considering the effect of liquid sweating or external heat hazards. To understand the mechanisms of sweat evaporation, accumulation and dripping with continuous sweating under radiant heat, a multi-phase experiment was designed with a sweating Torso. The concept of clothed wettedness was proposed to understand sweat evaporation of the clothed body. Results showed that the eva
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Shrestha, Dev Chandra, Saraswati Acharya, and Dil Bahadur Gurung. "A Finite Element Approach to Evaluate Thermoregulation in the Human Body due to the Effects of Sweat Evaporation during Cooking, Cleaning, and Walking." Mathematical Problems in Engineering 2021 (May 26, 2021): 1–14. http://dx.doi.org/10.1155/2021/5539151.

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Sweat evaporation is the principal process of dissipating heat energy in a hot environment and during activities. Sweat loss is significantly affected by the level of energy expenditure, hormones, and the number of sweat glands. The thickness of the skin layer plays a vital role to maintain body temperature. The rate of sweat evaporation varies with ambient temperature and activity level. On increasing both metabolism and ambient temperature, sweat rate loss also increases and controls the body in the thermoregulatory system. The evaporative sweat release rate has a linear behavior. The approp
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Rhubenthiraan, Kelundapyan, Yee Yong Lee, Azuan Zakaria Mohd, Nagapan Sasitharan, and Chandira Segaran Viknheswar. "The Suitability of Porous Material to Simulate Evaporation in Human Sweating Mechanisms." International Journal of Engineering and Advanced Technology (IJEAT) 9, no. 3 (2020): 457–63. https://doi.org/10.35940/ijeat.C4805.029320.

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This study aims to determine the suitable porous material that can simulate human sweat evaporation rate for preliminary thermal comfort assessment. The objective of the study was to identify the relationship of human sweat evaporation rate with porous material evaporation rate. Field experimental has been conducted to measure the evaporation rate of porous material such as red clay, white clay, plaster and human sweat. Then, the correlation analysis was conducted between porous material evaporation rate and human sweat evaporation rate. The collected data were analyzed by using SPSS 20 and Mi
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Wei, Lei, Jingjing Zhou, Zhen Li, et al. "Quantitative analysis of sweat evaporation loss in epidermal microfluidic patches." RSC Advances 14, no. 26 (2024): 18406–16. http://dx.doi.org/10.1039/d4ra03483j.

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This study analyzes the mechanisms of sweat evaporation loss in epidermal microfluidic patches, derives the quantity of sweat loss, verifies the theoretical calculations by experiments, and discusses the structure design of the anti-evaporation.
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Cramer, Matthew N., and Ollie Jay. "Compensatory hyperhidrosis following thoracic sympathectomy: a biophysical rationale." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 302, no. 3 (2012): R352—R356. http://dx.doi.org/10.1152/ajpregu.00419.2011.

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A side-effect of endoscopic thoracic sympathectomy (ETS) is compensatory hyperhidrosis (CH), characterized by excessive sweating from skin areas with intact sudomotor function. The physiological mechanism of CH is unknown, but may represent an augmented local sweat rate from skin areas with uninterrupted sympathetic innervation based on evaporative heat balance requirements. For a given combination of activity and climate, the same absolute amount of evaporation (if any) is needed to balance the rate of metabolic heat production both pre- and post-ETS. However, the rate of local sweating per u
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Zhang, Zhiwei, Yi Li, Jie Liang, Lei Zhang, and Jianhua Zhang. "P‐10.11: Digital Microfluidics Chip for Sweat Detection Based on Dielectric Wetting." SID Symposium Digest of Technical Papers 55, S1 (2024): 1276–78. http://dx.doi.org/10.1002/sdtp.17339.

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Digital microfluidics (DMF) is a technique for actively dispensing and manipulating discrete microdroplets on hydrophobic surfaces. DMF devices based on electrowetting on medium (EWOD) effect are widely used due to their advantages of fast response speed, simple system and high accuracy. Microfluidics is important for sweat sensing because it minimizes sweat pollution and evaporation of sweat on the skin. However, the current microfluidic channel has some problems, such as the old and new sweat is easy to mix in the channel, the self‐driving efficiency is too low, and the small sweat volume ca
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Chen, Xiao-Ming, Yong-Jiang Li, Dan Han, et al. "A Capillary-Evaporation Micropump for Real-Time Sweat Rate Monitoring with an Electrochemical Sensor." Micromachines 10, no. 7 (2019): 457. http://dx.doi.org/10.3390/mi10070457.

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Sweat collection and real time monitoring of sweat rate play essential roles in physiology monitoring and assessment of an athlete’s performance during exercise. In this paper, we report a micropump for sweat simulant collection based on the capillary–evaporation effect. An electrochemical sensor is integrated into the micropump, which monitors the flow rate in real-time by detecting the current using three electrodes. The evaporation rate from micropore array, equivalent to the sweat rate, was theoretically and numerically investigated. The designed micropump yields the maximum collection rat
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Cao, Shuyang. "Wearable Biosensors for Non-invasive Sweat Analysis." Highlights in Science, Engineering and Technology 102 (July 11, 2024): 99–105. http://dx.doi.org/10.54097/hfg0v336.

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Wearable biosensors, especially sweat sensors have drawn significant attention in recent years. Sweat is of importance for its wealth of biomarkers about physiological states. It is therefore utilized for health monitoring, exercise monitoring and so on. Physiological states of individuals can be analyzed through non-invasive wearable sweat biosensors. This paper introduces progress made in sweat sensing technology, including soft materials and microfluidic networks that achieved sweat collection without evaporation. Recent research improved sweat capture of rest individuals and led to robust
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Zhao, Mengmeng, Chuansi Gao, Faming Wang, Kalev Kuklane, Ingvar Holmér, and Jun Li. "The torso cooling of vests incorporated with phase change materials: a sweat evaporation perspective." Textile Research Journal 83, no. 4 (2012): 418–25. http://dx.doi.org/10.1177/0040517512460294.

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Cooling vests incorporated with phase change materials (PCMs) add extra insulation and restrict sweat evaporation. It is still unclear how much cooling benefit they can provide. The aim of this study was to investigate the torso cooling of the PCM vests in two hot environments: hot humid (HH, 34°C, 75% relative humidity (RH)) and hot dry (HD, 34°C, 37% RH). A pre-wetted torso fabric skin was used to simulate torso sweating on a thermal manikin. Three cooling vests incorporated with three melting temperatures ( Tm) of PCMs were tested ( Tm = 21°C, Tm = 24°C and Tm = 28°C). They were worn under
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Otomasu, Kinuyo, Masaki Yamauchi, Nobu Ohwatari, Takaaki Matsumoto, Katsuhiko Tsuchiya, and Mitsuo Kosaka. "Analysis of sweat evaporation from clothing materials by the ventilated sweat capsule method." European Journal of Applied Physiology 76, no. 1 (1997): 1–7. http://dx.doi.org/10.1007/s004210050205.

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Dissertations / Theses on the topic "Sweat Evaporation"

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Chen, Xi. "Climate and landscape controls on seasonal water balance at the watershed scale." Doctoral diss., University of Central Florida, 2014. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/6263.

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The main goal of this dissertation is to develop a seasonal water balance model for evaporation, runoff and water storage change based on observations from a large number of watersheds, and further to obtain a comprehensive understanding on the dominant physical controls on intra-annual water balance. Meanwhile, the method for estimating evaporation and water storage based on recession analysis is improved by quantifying the seasonal pattern of the partial contributing area and contributing storage to base flow during low flow seasons. A new method for quantifying seasonality is developed in
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Pathak, Rabi. "Numerical Analysis to Understand Influence of Ventilation Systems on Thermal Comfort Parameters, Quality of Air, and Local Sweating." Thesis, 2023. https://etd.iisc.ac.in/handle/2005/6125.

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The body’s heat exchange mechanisms include sensible heat transfer at the skin surface (also called “Dry Heat exchange”) due to temperature differences (via conduction, convection, and radiation (long-wave and short-wave)), latent heat transfer (via moisture evaporating and diffusing through the skin, and through sweat evaporation on the surface), and sensible plus latent exchange via respiration from the lungs as the breathing process involves humidifying exhaled air with around 34◦C in normal resting person with more or less constant core temperature at 36◦C. It is important to predict comfo
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Books on the topic "Sweat Evaporation"

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Falk, Bareket, and Raffy Dotan. Temperature regulation. Edited by Neil Armstrong and Willem van Mechelen. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780198757672.003.0014.

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Under all but the most extreme environmental heat conditions, children control their body temperature (at rest and during exercise) as well as adults. Children, however, use a different thermoregulatory strategy. Compared with adults, children rely more on dry heat dissipation and less on evaporative cooling (sweating). Their larger skin surface-area relative to mass does put children at increasing disadvantage, relative to adults, as ambient temperatures rise above skin temperature. Similarly, they become increasingly disadvantaged upon exposure to decreasing temperatures below the thermo-neu
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Book chapters on the topic "Sweat Evaporation"

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Omer, Altyeb Ali Abaker, Ming Li, Xin-liang Liu, et al. "The Effect of the Novel Agricultural Photovoltaic System on Water Evaporation Reduction and Sweet Potato Yield." In Proceedings of the 2022 International Petroleum and Petrochemical Technology Conference. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-2649-7_50.

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Nielsen, Ruth. "EVAPORATION OF SWEAT FROM DRESSED MAN." In Advances In Industrial Ergonomics And Safety V. CRC Press, 1993. http://dx.doi.org/10.1201/9781482272413-60.

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Ohazama, Atsushi, and Paul T. Sharpe. "Development of Epidermal Appendages: Teeth and Hair." In Inborn Errors Of Development. Oxford University PressNew York, NY, 2008. http://dx.doi.org/10.1093/oso/9780195306910.003.0018.

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Abstract The skin serves several functions, including thermoregulation, protection from the external environment, maintaining internal tissue Muid from evaporation, reduction of friction in water, sensation, defense against predation and infection, and supporting the hair and feathers. The distribution of pigment in skin and odors from the skin are also important for social interaction and defense. To ful7ll these multiple functions, the skin develops many structures as epidermal appendages (e.g., scales, feathers, hair, horns, nails, claws, sweat glands, sebaceous glands, and mammary glands). In addition, other epidermal appendages, most notably teeth, develop from the same ectoderm as skin in the oral cavity.
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Mitchell, Graham. "Keeping Cool." In How Giraffes Work. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780197571194.003.0014.

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Measurement of giraffe body temperature has shown that it is ~38.5<sup>o</sup>C but it can vary by ~5<sup>o</sup>C over the course of a day. Body heat is derived from fermentation of browse, other metabolic processes and radiant heat. Heat loss mechanisms partly depend on body surface area. Despite their unusual shape the body surface area of giraffes is similar to that in other equivalent body mass mammals: a shorter trunk is offset by a longer neck and legs. Heat loss by radiation is constant, by conduction rare and minimal. Their long, slender legs and neck are an advantage for convective and evaporative heat loss from the skin: heat transfer is inversely proportional to the square root of diameter. Evaporation from the respiratory system occurs through the nasal mucosa, the surface area of which in giraffes is large. Cooling of the nasal mucosa and blood follows and cool blood drains in to the jugular vein and contributes to whole body cooling and cooling of the blood supplying the brain by heat exchange in the carotid rete. Similar heat exchange may occur across the surface of the ossicones. Behavior changes when ambient temperature exceeds skin temperature. Giraffes re-orientate their bodies to minimize radiant heat gain and seek shade. A unique arrangement of blood vessels supplying blood to skin patches allows patches to act as thermal windows through which heat can be lost an arrangement enhanced by evaporation: sweat gland density in the skin of patches is greater than it is elsewhere.
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Mitchell, Graham. "Water Balance in Giraffes." In How Giraffes Work. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780197571194.003.0011.

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Wild giraffes live in arid environments. Having access to water and minimizing water requirements are critical. The main sources of water are the water in browse and water generated by metabolism. Giraffes rely less on surface water: intermittent use of surface water is a legendary characteristic of giraffes. The volume of water needed depends on body mass. For a giraffe weighing 750 kg, ~25 L of water is needed daily. The water content of browse is ~60%, and as a giraffe of that mass will eat ~35 kg of fresh browse daily, it simultaneously will acquire ~20 L of water. Metabolism of the fat, carbohydrates, and proteins in 35 kg of fresh browse will produce ~10 L of water. These two sources of water exceed daily requirements and reduce the need to drink surface water. Water is lost through feces, evaporation from the skin and respiratory tract, and in urine. Fecal water loss and water lost in exhaled air amount to ~4 L daily (~2 L each). It is not known if giraffes sweat, but their skin contains active sweat glands. The volume of water lost as sweat will vary according to what thermoregulatory mechanisms are activated to minimize sweating, but may be 5 L daily. Obligatory excretion of water-soluble wastes in urine can account for most water lost daily, and that amount is related to kidney anatomy and function. In a 750-kg giraffe, obligatory urine volume is ~10 L daily.
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Conference papers on the topic "Sweat Evaporation"

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Bernhart, Severin, Jannic Wälde, Otmar Schneider, and Thomas Finkenzeller. "Textile Moisture Sensors for Estimating Sweat Evaporation Saturation in Fire Protective Clothing." In 2024 IEEE Applied Sensing Conference (APSCON). IEEE, 2024. http://dx.doi.org/10.1109/apscon60364.2024.10466185.

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Swarnkar, Utsav, Rabi Pathak, and Rina Maiti. "Analysis of Sweat Evaporation and Heat Transfer on Skin Surface: A Pointwise Numerical Study." In The 9th World Congress on Momentum, Heat and Mass Transfer. Avestia Publishing, 2024. http://dx.doi.org/10.11159/icmfht24.174.

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Reischl, Uwe, Budimir Mijovic, and Alex Honn. "Wildland Firefighter Helmet Air-Supply System for Reducing Smoke Exposure and Heat Stress." In 16th International Conference on Applied Human Factors and Ergonomics (AHFE 2025). AHFE International, 2025. https://doi.org/10.54941/ahfe1006582.

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The scope and severity of wildfires worldwide have increased during the past several decades. Thousands of firefighters are employed each year to control these fires. The occupational health and safety risks associated with wildland firefighting are significant and numerous. The most common are physical injury, smoke inhalation and heat stress. A prototype helmet air supply system was developed to reduce such risks. The system uses air ducts inside the helmet that channel filtered air to the breathing zone and filtered air over the head of the firefighter. The system was designed to provide a
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Zhang, Xinsheng, Ming Zhou, Zhi Huang, Xiaoding Xu, Xianzheng Zhang, and Xuejiao Hu. "Biomimetic Passive Skin Cooling for High-End Handheld Devices." In ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer. ASMEDC, 2009. http://dx.doi.org/10.1115/mnhmt2009-18370.

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Increasing functionality demands more heat dissipation from the skin of handheld microelectronics devices. The maximum amount of heat that can be dissipated passively, prescribed by the natural convection and blackbody radiation theories, is becoming the bottleneck. In this paper, we propose a novel technique that may overcome this passive cooling limit. It is made possible by using a biomimetic skin capable of perspiration on demand. The key component of the biomimetic skin is a thin layer of temperature sensitive hydro gel (TSHG). The TSHG layer can sweat the skin with moisture when the skin
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Kerwin, Michael, Christopher Bascomb, and John Culver. "Infantry Soldier Cooling." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-70086.

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This report discusses the design problem of developing an air-based cooling system for an infantry soldier. The background explores the different designs that already exist as well as specific parts and materials that will be essential to the design process. Currently, liquid-based cooling systems are the most explored types of cooling devices. However, there are specific downsides to this type of cooling device. As opposed to an air-based system, water requires more energy to be cooled, and therefore more battery power. The liquid-based system is also relatively bulky and heavy due to battery
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Singh, Vikram, Erik Svensson, Sebastian Verhelst, and Martin Tuner. "Investigating the Potential of an Integrated Coolant Waste Heat Recovery System in an HD Engine Using PPC Operation." In ASME 2018 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/icef2018-9708.

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With the increasing focus on reducing emissions and making fuel efficient vehicles within the automotive industry over the past few years, new methods are constantly being investigated to improve the efficiency of the powertrain. One such method is recovering waste heat from the exhaust gases as well as the coolant using a thermodynamic cycle such as a Rankine cycle. However, most studies looking into low temperature or coolant heat recovery investigate the use of a separate secondary cycle for the recovery of waste heat itself. This has the disadvantage of having the working fluid at a lower
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Sharma, A., S. K. S. Boetcher, W. A. Aissa, and M. J. Traum. "Impact of Interstitial Mass Transport Resistance on Water Vapor Diffusion Through Southern Mills Defender™ 750 Fabric Layers." In ASME/JSME 2011 8th Thermal Engineering Joint Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajtec2011-44485.

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Textiles maintain wearer comfort by allowing evaporated sweat to permeate through, providing thermal management and keeping skin dry. Each textile layer presents a resistance to mass transport consistent with its physical structure (i.e., thickness, porosity, and tortuosity). However, when textiles are layered, water vapor transport becomes more complex because diffusing molecules must traverse interstitial spaces between layers. Interstitial mass transport resistances of significant magnitude can reduce rates of water vapor transport through layered textile stacks. The prevailing textile mass
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Carballo Leyenda, Belén, Jorge Gutiérrez Arroyo, José Gerardo Villa Vicente, Fabio García-Heras, Juan Rodríguez Medina, and Jose A Rodríguez-Marroyo. "Laboratory assessment of heat strain in female and male wildland firefighters." In 14th International Conference on Applied Human Factors and Ergonomics (AHFE 2023). AHFE International, 2023. http://dx.doi.org/10.54941/ahfe1003976.

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Wildland firefighters (WFF) face a set of specific work-related factors that directly affect their physical and cognitive abilities and compromise their health and safety. The working conditions include hard physical work and environmental conditions that combine high temperatures and high radiant heat. Such environments make using personal protective equipment (PPE) mandatory to protect them from risks. This fact restricts heat removal and adds extra weight, increasing thermal strain and the risk of heat-related illnesses on WFF. Since the number of females WFF has increased, it is necessary
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Reports on the topic "Sweat Evaporation"

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Fuchs, Marcel, Ishaiah Segal, Ehude Dayan, and K. Jordan. Improving Greenhouse Microclimate Control with the Help of Plant Temperature Measurements. United States Department of Agriculture, 1995. http://dx.doi.org/10.32747/1995.7604930.bard.

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A model of the energy balance of a transpiring crop in a greenhouse was developed in a format suitable for use in climate control algorithms aimed at dissipating excess heat during the warm periods. The model's parameters use external climatic variables as input. It incorporates radiation and convective transfer functions related to the operation of control devices like shading screens, vents, fans and enhanced evaporative cooling devices. The model identified the leaf boundary-layer resistance and the leaf stomatal and cuticular resistance as critical parameters regulating the temperature of
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Malm, Therese. Energy use and indoor climate in livestock buildings for pigs : an introductory paper. Faculty of Landscape Architecture, Horticulture and Crop Production Science, Swedish University of Agricultural Sciences, 2024. http://dx.doi.org/10.54612/a.5tt5942kdj.

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Swedish pig farming is facing two climatic challenges: minimizing greenhouse gases and adapting to warmer climates in confined livestock buildings. Climate change leads to more heat waves, causing pigs in confined buildings to endure heat stress more often and for longer periods. Heat stress not only affects the animals' welfare and health negatively, but it also implies a risk of economic losses for farmers, as heat stress can result in slower growth, impacts on reproduction and increased mortality. Pigs are particularly sensitive to heat because they do have few sweat glands. This introducto
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