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Boundary-Layer Meteorology

, Volume 155, Issue 2, pp 209–227 | Cite as

Globe Anemo-radiometer

  • Makoto Nakayoshi
  • Manabu Kanda
  • Richard de Dear
Article

Abstract

We report on a new sensing technology for wind speed \((U)\) and shortwave and longwave radiation fluxes (\(S\) and \(L\), respectively) known as a “globe anemo-radiometer” (GAR). The GAR is intended for portable use in mobile observations along individual human pathways. The device was carefully designed to be compact, light, and omnidirectional, with low power consumption. The GAR evaluates the heat transfer coefficient \((h),\,S\), and \(L\) by solving the simultaneous heat balance equations of three globe thermometers with different surface properties. The optimal combination of the three globe thermometers, namely a black globe thermometer, a white globe thermometer, and a black globe thermometer with a heat source inside the sphere, was determined experimentally. \(U\) was evaluated using the empirical regression of \(h\) against \(U\), with the relationship between the Nusselt number and Reynolds number experimentally regressed for the conversion from \(h\) to \(U\), and the result compared with previous values from the literature. The performance of the GAR as a stationary sensor was evaluated in both field and wind-tunnel experiments and compared with that of reference meteorological sensors. The accuracy of determining \(U\) obtained by the GAR was \(0.24\,\hbox {m s}^{-1}\) averaged over a 1-min time frame, and that of \(S\) and \(L\), applying a 5-min moving average, 19 and 15 W m\(^{-2}\) respectively. Both the accuracy and response delay of the globe thermometers were possible sources of error.

Keywords

Globe anemometer Globe radiometer Globe thermometer  Heat transfer coefficient Mobile observation  Outdoor thermal environment 

Notes

Acknowledgments

This research was financially supported by JSPS KAKENHI Grant Number 227335 and 26889057, and Research Program on Climate Change Adaptation (RECCA) from the Ministry of Education, Culture, Sports, Science and Technology, Japan.

References

  1. de Dear R (1987) Ping pong globe thermometers for mean radiant temperature: heating and ventilating engineer. J Air Cond 60(681):10–12Google Scholar
  2. Heusinkveld BG, van Hove LWA, Jacobs CMJ, Steeneveld GJ, Elbers JA, Moors EJ, Holtslag AAM (2010) Use of mobile platform for assessing urban heat stress in Rotterdam. In: Proceedings of the 7th conference on biometeorology, pp 433–438Google Scholar
  3. Kanda M, Moriwaki R, Kasamatsu F (2006) Spatial variability of both turbulent fluxes and temperature profiles in an urban roughness layer. Boundary-Layer Meteorol 121:339–50CrossRefGoogle Scholar
  4. Kirk GD, Johnson AT (1986) Experimental determination of mixed convective heat transfer from a sphere to air. Int Commun Heat Mass 13:369–87CrossRefGoogle Scholar
  5. Kramers H (1946) Heat transfer from spheres to flowing media. Physica 12:61–80CrossRefGoogle Scholar
  6. Kreith F (1973) Principles of heat transfer. Intext Educational Publishers, New York, 672 ppGoogle Scholar
  7. Kreith F, Roberts LG, Sullivan JA, Sinha SN (1963) Convection heat transfer and flow phenomena of rotating spheres. Int J Heat Mass Tranf 6:881–895CrossRefGoogle Scholar
  8. Lavender WJ, Pei DCT (1967) The effect of fluid turbulence on the rate of heat transfer from spheres. Int J Heat Mass Tranf 10:529–539CrossRefGoogle Scholar
  9. Nakayoshi M, Kanda M (2009) Lagrangian human bio-meteorology. In: Proceedings of the seventh international conference on urban climate, P4-31Google Scholar
  10. Nakayoshi M, Kanda M, Shi R, de Dear R (2014) Outdoor thermal physiology along human pathways: a study using a wearable measurement system. Int J Biometeorol. doi: 10.1007/s00484-014-0864-y
  11. Narita K, Sugawara H, Honjo T (2008) Effects of roadside trees on the thermal environment within a street canyon. Geogr Rep Tokyo Metrop Univ 43:41–48Google Scholar
  12. Raithby GD, Eckert ERG (1968) The effect of turbulence parameters and support position on the heat transfer from spheres. Int J Heat Mass Tranf 11:1233–1252CrossRefGoogle Scholar
  13. Schlichting H, Gersten K (2000) Boundary layer theory. Springer, New York, 799 ppGoogle Scholar
  14. Sugawara H, Narita K, Mikami T (2004) Representative air temperature of thermally heterogeneous urban areas using the measured pressure gradient. J Appl Meteorol 43:1168–79CrossRefGoogle Scholar
  15. Thorsson S, Lindberg F, Eliasson I, Holmer B (2007) Different methods for estimating the mean radiant temperature in an outdoor urban setting. Int J Climatol 27:1983–1993CrossRefGoogle Scholar
  16. Vernon HM (1932) The measurement of radiant heat in relation to human comfort. J Ind Hyg 14:95–111Google Scholar
  17. Vliet GC, Leppert G (1961) Forced convection heat transfer from an isothermal sphere to water. J Heat Transf 83:163–170CrossRefGoogle Scholar
  18. Williams GC (1943) Heat transfer, mass transfer and friction for spheres. PhD Thesis, Massachusetts Institute of Technology, 109 ppGoogle Scholar
  19. Yamashita S (1996) Detailed structure of heat island phenomena from moving observations from electric tram-cars in metropolitan Tokyo. Atmos Environ 30(3):429–435CrossRefGoogle Scholar
  20. Yuge T (1960) Experiments on heat transfer from spheres including combined natural and forced convection. J Heat Transf 82:214–220CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  • Makoto Nakayoshi
    • 1
  • Manabu Kanda
    • 2
  • Richard de Dear
    • 3
  1. 1.Department of Civil EngineeringTokyo University of ScienceChibaJapan
  2. 2.Department of International Development EngineeringTokyo Institute of TechnologyTokyoJapan
  3. 3.Faculty of Architecture, Design and PlanningThe University of SydneySydneyAustralia

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