Author
Raymond Hardbottle
Bio: Raymond Hardbottle is an academic researcher. The author has contributed to research in topics: Evaporative cooler. The author has an hindex of 1, co-authored 1 publications receiving 76 citations.
Topics: Evaporative cooler
Papers
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TL;DR: In this paper, the authors focused on the concept of evaporative cooling of trapped neutral atoms and showed that phase-space density could be increased by six orders of magnitude in these experiments.
Abstract: Publisher Summary This chapter focuses on the concept of evaporative cooling of trapped neutral atoms. The recent observations of Bose–Einstein condensation have shown dramatically the potential of evaporative cooling. Through evaporative cooling, phase-space density could be increased by six orders of magnitude in these experiments. In such experiments, evaporative cooling was used to reach temperature and densities that are unprecedented for trapped atoms and greatly exceeded what had been reached before by laser cooling. Laser cooling has recently broken the recoil limit in three dimensions (3D) and reached extremely cold temperatures of 3 nK in 1D. However, none of these optical sub-recoil techniques has been realized so far at high densities. The current density limitations are caused by the absorption of light, radiation trapping, and excited state collisions. An often-mentioned disadvantage of evaporative cooling is the loss of atoms. However, as discussed in the chapter, the efficiency of evaporative cooling is quite high.
599 citations
TL;DR: In this article, a detailed derivation of the heat and mass transfer equations of evaporative cooling in wet cooling towers is given, with the aid of enthalpy diagrams and psychrometric charts.
229 citations
TL;DR: In this paper, a new mathematical model of a mechanical draft cooling tower performance has been developed, which represents a boundary value problem for a system of ordinary differential equations, describing a change in the droplets velocity, its radii and temperature, and also the temperature and density of the water vapor in a mist air in a cooling tower.
140 citations
Dissertation•
01 Jan 1988
TL;DR: In this paper, the authors propose a method to solve the problem of the problem: this paper... ]..,.. )].. [1].
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107 citations
TL;DR: In this paper, a numerical study of heat and mass transfer in indirect evaporative air coolers with four air flow patterns: parallel flow, counter-flow, cross-flow and regenerative is presented.
94 citations