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Farnham, C, Zhang, L, Yuan, J, Emura, K, Alam, A M and Mizuno, T (2017) Measurement of the evaporative cooling effect: Oscillating misting fan. Building Research & Information, 45(07), 783-99.

  • Type: Journal Article
  • Keywords: alternative technology; cooling; heat flux; thermal comfort; evaporative; mist; evaporation cooling; system; construction & building technology; climate; spraying; indoor environments; cooling effects; summer; evaporative cooling; temperature effects;
  • ISBN/ISSN: 0961-3218
  • URL: https://doi.org/10.1080/09613218.2017.1278651
  • Abstract:
    To determine the thermal effects of an oscillating mist fan (spraying 86L/h of droplets with 25 mu m mean diameter) on worker comfort, its effects on the thermal environment were measured in a large indoor space (37,500m(2)/525,000m(3)). It was found that the temperature dropped by 0.2-2.5K, with local humidity increasing by 5%. Ventilation air-exchange calculations indicate that in hot summer conditions, an 8-h shift could be continuously cooled without creating high humidity, recovering to initial values after 16 h of ventilation at 0.3 ach. The cooling effect of the mist and fan was measured and compared with that of the fan. The mist and fan-cooling effect exceeded 100W/m(2) in all cases, while the mist and fan cooling exceeded the fan alone by 18W/m(2) on average, 24W/m(2) at the peak values and 11W/m(2) average during oscillation. The ASHRAE 55-2013 model is modified to include this additional cooling. Standard effective temperatures (SETs) are calculated with and without the mist fan-cooling effect. Linear approximations for reduction in SET were developed as a function of air temperature and mist-cooling effect. The deployment of this technology would improve thermal comfort for factory workers on hot summer days.;To determine the thermal effects of an oscillating mist fan (spraying 86 L/h of droplets with 25 µm mean diameter) on worker comfort, its effects on the thermal environment were measured in a large indoor space (37,500 m2/525,000 m3). It was found that the temperature dropped by 0.2-2.5 K, with local humidity increasing by 5%. Ventilation air-exchange calculations indicate that in hot summer conditions, an 8-h shift could be continuously cooled without creating high humidity, recovering to initial values after 16 h of ventilation at 0.3 ach. The cooling effect of the mist and fan was measured and compared with that of the fan. The mist and fan-cooling effect exceeded 100 W/m2 in all cases, while the mist and fan cooling exceeded the fan alone by 18 W/m2 on average, 24 W/m2 at the peak values and 11 W/m2 average during oscillation. The ASHRAE 55-2013 model is modified to include this additional cooling. Standard effective temperatures (SETs) are calculated with and without the mist fan-cooling effect. Linear approximations for reduction in SET were developed as a function of air temperature and mist-cooling effect. The deployment of this technology would improve thermal comfort for factory workers on hot summer days.;To determine the thermal effects of an oscillating mist fan (spraying 86 L/h of droplets with 25 µm mean diameter) on worker comfort, its effects on the thermal environment were measured in a large indoor space (37,500 m 2 /525,000 m 3 ). It was found that the temperature dropped by 0.2-2.5 K, with local humidity increasing by 5%. Ventilation air-exchange calculations indicate that in hot summer conditions, an 8-h shift could be continuously cooled without creating high humidity, recovering to initial values after 16 h of ventilation at 0.3 ach. The cooling effect of the mist and fan was measured and compared with that of the fan. The mist and fan-cooling effect exceeded 100 W/m 2 in all cases, while the mist and fan cooling exceeded the fan alone by 18 W/m 2 on average, 24 W/m 2 at the peak values and 11 W/m 2 average during oscillation. The ASHRAE 55-2013 model is modified to include this additional cooling. Standard effective temperatures (SETs) are calculated with and without the mist fan-cooling effect. Linear approximations for reduction in SET were developed as a function of air temperature and mist-cooling effect. The deployment of this technology would improve thermal comfort for factory workers on hot summer days.;

Farnham, C, Zhang, L, Yuan, J, Emura, K, Alam, A M and Mizuno, T (2017) Measurement of the evaporative cooling effect: oscillating misting fan. Building Research & Information, 45(07), 783–99.

Kingma, B R M, Schweiker, M, Wagner, A and van Marken Lichtenbelt, W D (2017) Exploring internal body heat balance to understand thermal sensation. Building Research & Information, 45(07), 808-18.

Kingma, B, Schweiker, M, Wagner, A and van Marken Lichtenbelt, W D (2017) Exploring internal body heat balance to understand thermal sensation. Building Research & Information, 45(07), 808–18.

Nicol, F (2017) Temperature and adaptive comfort in heated, cooled and free-running dwellings. Building Research & Information, 45(07), 730-44.

Nicol, F (2017) Temperature and adaptive comfort in heated, cooled and free-running dwellings. Building Research & Information, 45(07), 730–44.

Pallubinsky, H, Kingma, B R M, Schellen, L, Dautzenberg, B, van Baak, M A and van Marken Lichtenbelt, W D (2017) The effect of warmth acclimation on behaviour, thermophysiology and perception. Building Research & Information, 45(07), 800-7.

Pallubinsky, H, Kingma, B R M, Schellen, L, Dautzenberg, B, van Baak, M A and van Marken Lichtenbelt, W D (2017) The effect of warmth acclimation on behaviour, thermophysiology and perception. Building Research & Information, 45(07), 800–7.

Rijal, H B, Humphreys, M A and Nicol, J F (2017) Towards an adaptive model for thermal comfort in Japanese offices. Building Research & Information, 45(07), 717-29.

Rijal, H B, Humphreys, M A and Nicol, J F (2017) Towards an adaptive model for thermal comfort in Japanese offices. Building Research & Information, 45(07), 717–29.

Schweiker, M and Wagner, A (2017) Influences on the predictive performance of thermal sensation indices. Building Research & Information, 45(07), 745-58.

Schweiker, M and Wagner, A (2017) Influences on the predictive performance of thermal sensation indices. Building Research & Information, 45(07), 745–58.

van Marken Lichtenbelt, W, Hanssen, M, Pallubinsky, H, Kingma, B and Schellen, L (2017) Healthy excursions outside the thermal comfort zone. Building Research & Information, 45(07), 819-27.

van Marken Lichtenbelt, W, Hanssen, M, Pallubinsky, H, Kingma, B and Schellen, L (2017) Healthy excursions outside the thermal comfort zone. Building Research & Information, 45(07), 819–27.

Vargas, G, Lawrence, R and Stevenson, F (2017) The role of lobbies: Short-term thermal transitions. Building Research & Information, 45(07), 759-82.

Vargas, G, Lawrence, R and Stevenson, F (2017) The role of lobbies: short-term thermal transitions. Building Research & Information, 45(07), 759–82.