Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 94 for “"Sensible Heat"”.
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Latent and sensible heat storage in concrete blocks
… were recorded by digital data logger. Heating and cooling cycle were provided by two sets of microcomputer controlled air conditioning systems. Three different heating and cooling temperature ranges were applied on different combinations. The mean air flow velocities were also set …
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Modeling Sensible Heat Driven Direct Contact Membrane Distillation Treatment of Oilfield Produced Water
… (DCMD) to evaluate the feasibility of using sensible heat to drive DCMD treatment of oilfield produced water. Algorithms for performance prediction of instantaneous and counter-current DCMD flow were developed. These algorithms used equation-based models of heat transfer, mass transfer, …
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The influence of urban morphology on sensible heat flux and convective rainfall distributions over Greater Manchester
… atmospheric destabilisationassociated with the heat island and surface roughness is the most significant, more sothan microphysical or moisture enhancement. However the relative importance ofthese mechanisms remains unclear.The present work reports an investigation of the effects of urban …
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The application of the surface energy balance system model to estimate evapotranspiration in South Africa
… The model was found to underestimate the sensible heat flux through setting it at the wet limit. Daily ET measured by the eddy covariance system represented 55 to 96% of the SEBS estimate, an overestimation of daily ET. The consistent underestimation of the sensible heat flux was ascribed …
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What to plant and where to plant it; Modeling the biophysical effects of North America temperate forests on climate using the Community Earth System Model
… CO₂ but also by altering albedo, latent heat flux, and sensible heat flux. In this study we used the Community Earth System Model to assess the biophysical effect of North American temperate forests on climate and how this effect changes with location, tree type, and forest management. We …
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Implications of the Dense City Centre to Surface-Atmosphere Exchanges
… is on the controls on radiation, anthropogenic heat and the turbulent latent and sensible heat fluxes. The impact of the composition and three-dimensional structure of the urban surface, plus the associated anthropogenic activities, are investigated using remote sensing techniques, in-situ …
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A study of the effects of firing different sizes of coal in No.6 boiler
The sensible heat losses in the flue gases was exceeding the best economical operating ranges of the Boiler No. 6. This was done to study the adverse effect on the flue dust carryover in the furnace.
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Investigation of the Influence of Temperature Inversions and Turbulence on Land-atmosphere Interactions for Rolling Terrain
… used for estimating surface fluxes such as heat, moisture, and carbon dioxide (CO2) were designed to work best in horizontally uniform, flat terrain. This is a challenge for measuring surface fluxes in non-uniform, complex terrain as these models break down especially during stable …
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Estimation of catchment flood potential using satellite data
… turn, is used to calculate the sensible heat flux. The sensible heat flux is used in a simple convective model to estimate the height of the atmospheric boundary layer and the velocity of an ascending parcel of air. From this the probability of convective storm occurrence and …
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Estimativa de fluxo de calor sensível com suporte de cintilometria – estudo de caso : Cidade Universitária - Ilha do Fundão/RJ
… is an optical device used to estimate averaged sensible heat fluxes (H) from fluctuations in the refractive index of the turbulent atmosphere in a light beam spread between a transmitter and a receiver. The present dissertation proposes to study the behavior of the sensible heat production …
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Residential building energy analysis : development and uncertainty assessment of a simplified model
… program was written in C/C++ to calculate annual heat and cooling loads for residential buildings and to provide information about the relative importance of load contributions from the different building components. Estimates were made regarding the uncertainties of parameter inputs to the model, …
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A Model of Transient Heat Transfer in a Packed Bed of Alumina Particles
… study seeks to develop a robust system-scale heat transfer model for a sensible heat storage system. A novel mechanism to simulate axial dispersion and heat loss from the boundary of the sensible heat system to the environment is introduced. The most challenging topics to develop a robust heat …
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Formulation & Thermophysical Analysis of a Beeswax Microemulsion & The Experimental Calculation of its Heat Transfer Coefficient
… decades. PCMs have the ability to not only store Sensible Heat (SH) within a given temperature range, but also store large amounts of Latent Heat (LH) as they undergo a phase change, whether it is from solid to liquid or liquid to gas. This investigation examines the preparation of a beeswax …
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Impact of time and spatial averages on the energy balance closure
… secondary circulations mainly transported sensible heat, which led to an alternative energy balance correction by the buoyancy flux ratio approach, in which the attribution of the residual depended on the relative contribution of the sensible heat flux to the buoyancy flux. The fraction of …
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Evaluation of an aluminum latent heat storage system for the fluoride-salt-cooled high-temperature reactor
Latent heat energy storage (LHS) systems offer multiple advantages over sensible heat storage systems in terms of energy density, cost, and cycle efficiency. LHS systems use a phase change medium (PCM) that transfer heat at constant temperature. The use of metallic PCMs allows LHS to be used with …
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Investigations on Latent Thermal Energy Storage for Concentrating Solar Power
… to the grid. Energy can be stored either as sensible heat or latent heat, of which latent heat storage is advantageous due to its high volumetric energy density and the high Rankine cycle efficiency owing to the isothermal operation of latent thermal energy storage (LTES) system. Storing heat …
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Micrometeorological approaches to measure and model surface energy fluxes of irrigated citrus orchards in a semi-arid environment
… to provide reliable and low cost estimates of sensible heat fluxes within the plant-atmosphere system. Micrometeorological techniques were integrated with in situ measurements of transpiration by up-scaled sap flow techniques, physiological plant features and microclimatic characteristics of …
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Wind wave tank for experimental investigation of momentum and enthalpy transfer from the ocean surface at high wind speed
… Direct measurements of drag, evaporation, and sensible heat transfer are not easily performed on the high seas. Therefore, a wind wave tank has been constructed in which a few aspects of a tropical storm are simulated. The air velocity inside the annular tank is comparable to that of hurricane. …
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Statistical Models for Extreme Events in Atmospheric Processes
… boundary layer, with a focus on fluxes of sensible heat and methane. In the case of sensible heat, I studied to what extent the extreme values properties of temperature fluctuations retain information on the turbulence generation mechanism. In the case of methane, I focused instead on an …
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Second law analysis of a waste heat recovery combined power cycle using transcritical carbon dioxide
… for power generation and hot water production. Heat transfer between cycles occurs through a heat exchanger. To maximize heat exchanger effectiveness, a transcritical working fluid is used in the Rankine bottoming cycle to better match the heating curve of the sensible heat source. Carbon …
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