Topic
Latent heat
About: Latent heat is a research topic. Over the lifetime, 13503 publications have been published within this topic receiving 302811 citations.
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TL;DR: In this article, an optimization procedure for the design of a Latent Heat Thermal Management System (LHTMS), used for cooling an electronic device with transient and high heat generation, is presented.
85 citations
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TL;DR: In this paper, the authors evaluated the accuracy of EC systems in measuring sensible heat (H) and latent heat (LE) fluxes on irrigated cotton fields in the Texas High Plains during the months of June and July 2008.
Abstract: Eddy covariance (EC) systems are being used to assess the accuracy of remote sensing methods in mapping surface sensible and latent heat fluxes and evapotranspiration (ET) from local to regional scales, and in crop coefficient development. Therefore, the objective was to evaluate the accuracy of EC systems in measuring sensible heat (H) and latent heat (LE) fluxes. For this purpose, two EC systems were installed near large monolithic weighing lysimeters, on irrigated cotton fields in the Texas High Plains, during the months of June and July 2008. Sensible and latent heat fluxes were underestimated with an average error of about 30%. Most of the errors were from nocturnal measurements. Energy balance (EB) closure was 73.2–78.0% for daytime fluxes. Thus, daylight fluxes were adjusted for lack of EB closure using the Bowen ratio/preservation of energy principle, which improved the resulting EC heat flux agreement with lysimetric values. Further adjustments to EC-based ET included nighttime ET (composite) incorporation, and the use of ‘heat flux source area’ (footprint) functions to compensate ET when the footprint expanded beyond the crop field boundary. As a result, ET values remarkably matched lysimetric ET values, with a ‘mean bias error ± root mean square error’ of −0.03 ± 0.5 mm day−1 (or −0.6 ± 10.2%).
85 citations
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TL;DR: In this paper, an aircraft grid pattern was flown by the Canadian Twin Otter to map the low-level fluxes and structure over the First International Satellite Land Surface Climatology Project (ISLSCP) Field Experiment (FIFE) research area in 1987.
Abstract: An aircraft grid pattern was flown by the Canadian Twin Otter to map the low-level fluxes and structure over the First International Satellite Land Surface Climatology Project (ISLSCP) Field Experiment (FIFE) research area in 1987. The time dependence and horizontal advection of heat and moisture were extracted from these flights, combined with surface flux measurements and boundary layer top measurements from radiosondes, to analyze the boundary layer budget using a mixed layer model. The results confirm the suggestion of an earlier study that the boundary layer top entrainment (when parameterized using the buoyancy flux) is nearly double the value used by many modeling studies. Both surface and aircraft data have been revised, and it now appears that the direct measurements of the sensible and latent heat fluxes by the aircraft underestimated these fluxes by about 20 percent, because of filtering and undersampling of long wavelength contributions.
85 citations
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TL;DR: In this article, the transient response of packed bed latent heat thermal energy storage system in removing fluctuations in the heat transfer fluid (HTF) temperature during the charging and discharging period is presented.
85 citations
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TL;DR: In this paper, a phenomenological, stationary and dynamic model of a multiple effect evaporator for simulation and control purposes is described, which includes empirical knowledge about thermophysical properties that must be characterized into a thermodynamic equilibrium.
85 citations