The Experts below are selected from a list of 291 Experts worldwide ranked by ideXlab platform
Tze-huan Lei - One of the best experts on this subject based on the ideXlab platform.
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Differences in Dry-Bulb Temperature do not influence moderate-duration exercise performance in warm environments when vapor pressure is equivalent
European journal of applied physiology, 2020Co-Authors: Tze-huan Lei, Zachary J. Schlader, Ahmad Munir Che Muhamed, Huixin Zheng, Stephen R. Stannard, Narihiko Kondo, James D. Cotter, Toby MündelAbstract:Recent studies have determined that ambient humidity plays a more important role in aerobic performance than Dry-Bulb Temperature does in warm environments; however, no studies have kept humidity constant and independently manipulated Temperature. Therefore, the purpose of this study was to determine the contribution of Dry-Bulb Temperature, when vapor pressure was matched, on the thermoregulatory, perceptual and performance responses to a 30-min cycling work trial. Fourteen trained male cyclists (age: 32 ± 12 year; height: 178 ± 6 cm; mass: 76 ± 9 kg; $$\dot{V}{\text{O}}_{{{2}\,{\max}}}$$: 59 ± 9 mL kg−1 min−1; body surface area: 1.93 ± 0.12 m2; peak power output: 393 ± 53 W) volunteered, and underwent 1 exercise bout in moderate heat (MOD: 34.9 ± 0.2 °C, 50.1 ± 1.1% relative humidity) and 1 in mild heat (MILD: 29.2 ± 0.2 °C, 69.4 ± 0.9% relative humidity) matched for vapor pressure (2.8 ± 0.1 kPa), with trials counterbalanced. Despite a higher weighted mean skin Temperature during MOD (36.3 ± 0.5 vs. 34.5 ± 0.6 °C, p
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differences in Dry Bulb Temperature do not influence moderate duration exercise performance in warm environments when vapor pressure is equivalent
European Journal of Applied Physiology, 2020Co-Authors: Tze-huan Lei, Zachary J. Schlader, Ahmad Munir Che Muhamed, Huixin Zheng, Stephen R. Stannard, Narihiko Kondo, James D. Cotter, Toby MündelAbstract:Recent studies have determined that ambient humidity plays a more important role in aerobic performance than Dry-Bulb Temperature does in warm environments; however, no studies have kept humidity constant and independently manipulated Temperature. Therefore, the purpose of this study was to determine the contribution of Dry-Bulb Temperature, when vapor pressure was matched, on the thermoregulatory, perceptual and performance responses to a 30-min cycling work trial. Fourteen trained male cyclists (age: 32 ± 12 year; height: 178 ± 6 cm; mass: 76 ± 9 kg; $$\dot{V}{\text{O}}_{{{2}\,{\max}}}$$: 59 ± 9 mL kg−1 min−1; body surface area: 1.93 ± 0.12 m2; peak power output: 393 ± 53 W) volunteered, and underwent 1 exercise bout in moderate heat (MOD: 34.9 ± 0.2 °C, 50.1 ± 1.1% relative humidity) and 1 in mild heat (MILD: 29.2 ± 0.2 °C, 69.4 ± 0.9% relative humidity) matched for vapor pressure (2.8 ± 0.1 kPa), with trials counterbalanced. Despite a higher weighted mean skin Temperature during MOD (36.3 ± 0.5 vs. 34.5 ± 0.6 °C, p < 0.01), none of rectal Temperature (38.0 ± 0.3 vs. 37.9 ± 0.4 °C, p = 0.30), local sweat rate (1.0 ± 0.3 vs. 0.9 ± 0.4 mg cm−2 min−1, p = 0.28), cutaneous blood flow (283 ± 116 vs. 287 ± 105 PU, p = 0.90), mean power output (206 ± 37 vs. 205 ± 41 W, p = 0.87) or total work completed (371 ± 64 vs. 369 ± 70 kJ, p = 0.77) showed any difference between environments during the work trial. However, all perceptual measures (perceived exertion, thermal discomfort, thermal sensation, skin wettedness, pleasantness, all p < 0.05) were affected detrimentally during MOD compared to MILD. In a warm and compensable environment, Dry-Bulb Temperature did not influence high-intensity cycling performance when vapor pressure was maintained, whilst the perceptual responses were affected.
Toby Mündel - One of the best experts on this subject based on the ideXlab platform.
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Differences in Dry-Bulb Temperature do not influence moderate-duration exercise performance in warm environments when vapor pressure is equivalent
European journal of applied physiology, 2020Co-Authors: Tze-huan Lei, Zachary J. Schlader, Ahmad Munir Che Muhamed, Huixin Zheng, Stephen R. Stannard, Narihiko Kondo, James D. Cotter, Toby MündelAbstract:Recent studies have determined that ambient humidity plays a more important role in aerobic performance than Dry-Bulb Temperature does in warm environments; however, no studies have kept humidity constant and independently manipulated Temperature. Therefore, the purpose of this study was to determine the contribution of Dry-Bulb Temperature, when vapor pressure was matched, on the thermoregulatory, perceptual and performance responses to a 30-min cycling work trial. Fourteen trained male cyclists (age: 32 ± 12 year; height: 178 ± 6 cm; mass: 76 ± 9 kg; $$\dot{V}{\text{O}}_{{{2}\,{\max}}}$$: 59 ± 9 mL kg−1 min−1; body surface area: 1.93 ± 0.12 m2; peak power output: 393 ± 53 W) volunteered, and underwent 1 exercise bout in moderate heat (MOD: 34.9 ± 0.2 °C, 50.1 ± 1.1% relative humidity) and 1 in mild heat (MILD: 29.2 ± 0.2 °C, 69.4 ± 0.9% relative humidity) matched for vapor pressure (2.8 ± 0.1 kPa), with trials counterbalanced. Despite a higher weighted mean skin Temperature during MOD (36.3 ± 0.5 vs. 34.5 ± 0.6 °C, p
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differences in Dry Bulb Temperature do not influence moderate duration exercise performance in warm environments when vapor pressure is equivalent
European Journal of Applied Physiology, 2020Co-Authors: Tze-huan Lei, Zachary J. Schlader, Ahmad Munir Che Muhamed, Huixin Zheng, Stephen R. Stannard, Narihiko Kondo, James D. Cotter, Toby MündelAbstract:Recent studies have determined that ambient humidity plays a more important role in aerobic performance than Dry-Bulb Temperature does in warm environments; however, no studies have kept humidity constant and independently manipulated Temperature. Therefore, the purpose of this study was to determine the contribution of Dry-Bulb Temperature, when vapor pressure was matched, on the thermoregulatory, perceptual and performance responses to a 30-min cycling work trial. Fourteen trained male cyclists (age: 32 ± 12 year; height: 178 ± 6 cm; mass: 76 ± 9 kg; $$\dot{V}{\text{O}}_{{{2}\,{\max}}}$$: 59 ± 9 mL kg−1 min−1; body surface area: 1.93 ± 0.12 m2; peak power output: 393 ± 53 W) volunteered, and underwent 1 exercise bout in moderate heat (MOD: 34.9 ± 0.2 °C, 50.1 ± 1.1% relative humidity) and 1 in mild heat (MILD: 29.2 ± 0.2 °C, 69.4 ± 0.9% relative humidity) matched for vapor pressure (2.8 ± 0.1 kPa), with trials counterbalanced. Despite a higher weighted mean skin Temperature during MOD (36.3 ± 0.5 vs. 34.5 ± 0.6 °C, p < 0.01), none of rectal Temperature (38.0 ± 0.3 vs. 37.9 ± 0.4 °C, p = 0.30), local sweat rate (1.0 ± 0.3 vs. 0.9 ± 0.4 mg cm−2 min−1, p = 0.28), cutaneous blood flow (283 ± 116 vs. 287 ± 105 PU, p = 0.90), mean power output (206 ± 37 vs. 205 ± 41 W, p = 0.87) or total work completed (371 ± 64 vs. 369 ± 70 kJ, p = 0.77) showed any difference between environments during the work trial. However, all perceptual measures (perceived exertion, thermal discomfort, thermal sensation, skin wettedness, pleasantness, all p < 0.05) were affected detrimentally during MOD compared to MILD. In a warm and compensable environment, Dry-Bulb Temperature did not influence high-intensity cycling performance when vapor pressure was maintained, whilst the perceptual responses were affected.
Kamel Hooman - One of the best experts on this subject based on the ideXlab platform.
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Simple predictive tool to estimate relative humidity using wet Bulb depression and Dry Bulb Temperature
Applied Thermal Engineering, 2013Co-Authors: Alireza Bahadori, Gholamreza Zahedi, Sohrab Zendehboudi, Kamel HoomanAbstract:In this work, a simple predictive tool is presented to estimate relative humidity as a function of wet Bulb depression and Dry Bulb Temperature. The predictive tool is simple, straightforward, and can be readily implemented in any standard spreadsheet program leading to accurate, smooth, and non-oscillatory datapoints. The prime application of the method is as a quick-and-easy evaluation tool in conceptual development and scoping studies where the estimation of the relative humidity, as a function of wet Bulb depression and Temperature, is being considered. Results from the proposed correlation are successfully compared to available data in the literature for a wide range of wet Bulb depression and Dry Bulb Temperatures. This gives us the confidence to offer our findings for engineering applications where a rough and ready programmable estimate is sought.
Pamela N. Knox - One of the best experts on this subject based on the ideXlab platform.
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Two Simple and Accurate Approximations for Wet-Bulb Temperature in Moist Conditions, With Forecasting Applications
Bulletin of the American Meteorological Society, 2017Co-Authors: John A. Knox, David S. Nevius, Pamela N. KnoxAbstract:AbstractThe wet-Bulb Temperature is a widely used moist thermodynamic variable. The relationship between the wet-Bulb Temperature, the Dry-Bulb Temperature, and the dewpoint Temperature is nonlinea...
Eiji Hihara - One of the best experts on this subject based on the ideXlab platform.
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prediction of air coil performance under partially wet and totally wet cooling conditions using equivalent Dry Bulb Temperature method
International Journal of Refrigeration-revue Internationale Du Froid, 2003Co-Authors: Jianfeng Wang, Eiji HiharaAbstract:This paper mainly deals with the cooling and dehumidifying performance of air coils used in refrigeration and air-conditioning systems. A new method, equivalent Dry-Bulb Temperature (EDT) method, is proposed for calculating the heat and mass transfer and for predicting the cooling modes (totally wet, partially wet, and totally Dry) of moist air over the coil surface. A numeric model is further developed and validated with the experimental data of plain fin air coils. The deviation in both the cooling capacity and the vapor condensate estimated by the model is within the range of ±10%, and the prediction for the cooling modes of moist air over the coil surfaces is fairly exact.
