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 224 for “"Latent heat"”.
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Latent heat storage in concrete
… the concrete. These PCM's absorb or release the latent heat of fusion at a selected temperature and thereby greatly enhance the heat storage capacity of the impregnated concrete over a small temperature range. Modification of the concretes were performed to enhance their compatibility with the …
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Latent heat fluxes through nano-engineered porous materials
… within the truss pores and accompanying latent heat lift under ambient temperature and pressure. One application is desert Soldier protection. Need exists to clarify whether smaller pore diameters affect surface cooling and water vapor transport owing to fluid rarefaction or surface …
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Latent heat flux and South African summer rainfall variability
… if a relationship exists between oceanic latent heat flux and the summer rainfall of South Africa. Such a link would be useful for a better understanding and the prediction of monthly variability in the summer rainfall for South Africa. In order to investigate possible relationships …
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Thermal performance of a room with wall latent heat storage
… model was developed to simulate the transient heat transfer process in the walls with PCM gypsum board as inside lining. The model takes into account the transient boundary conditions, absorbed solar radiation, the melting/freezing of the PCM and employed a nonlinear film coefficient. …
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Relation of vertical motions to the release of latent heat
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1960.
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Exploring sensitivities of latent heat parameterizations using a coupled, integrated hydrologic model
Evapotranspiration and its energy counterpart latent heat flux are critical components of the terrestrial water and energy balances. Precipitation, runoff, condensation and groundwater flow are also significant members of the hydrologic cycle, but it is evapotranspiration that links water in the …
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Latent Heat Thermal Energy Storage with Embedded Heat Pipes for Concentrating Solar Power Applications
<p>An innovative, novel concept of combining heat pipes with latent heat thermal energy storage (LHTES) for concentrating solar power (CSP) applications is explored. The low thermal conductivity of phase change materials (PCMs) used in LHTES presents a design challenge due to slow heat transfer …
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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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Thermal Energy Storage Technologies: Fast Modelling, Realisation and Experimental Characterisation of Innovative Latent Heat Storage Units for System Integration
L'abstract è presente nell'allegato / the abstract is in the attachment
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Surface heat fluxes and MJO propagation through the Maritime Continent
… in terms of their propagation characteristics. Latent heat flux from CYGNSS and OAFLUX as well as CYGNSS surface winds are used to compare large-scale patterns for MJO events that do and do not propagate through the MC. Local area-averaged surface fluxes and OLR anomalies are 7-14% and 18-22% of …
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Studies on Thermodynamic Properties of Nanoclusters With Thin-Film Nanocalorimetry
… Coalescence was thermal activated in a first heating cycle, and the heat capacities of the sample were measured during the multiple heating cycles. Two contributions, from the latent heat of fusion and the surface energy, make up the total amount of coalescence energy. For the first time, we …
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Modeling land surface processes of the midwestern United States : predicting soil moisture under a warmer climate
… the midwestern United States. The sensitivity of latent heat flux to available energy plays an important role in determining the effects of climate change on regional hydrologic cycles. An intuitive framework based on the Penman-Monteith equation was developed that identifies deficiencies in model …
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On the role of the Agulhas Current on weather and climate of South Africa
… ocean to atmosphere (also called the turbulent latent heat flux). The dynamics of ocean-atmosphere interaction above the Agulhas Current and its impact on the weather and climate of Southern Africa are not well known. This is due to a) climate reanalyses that do not include the Agulhas Current …
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A domestic solar/heat pump heating system incorporating latent and stratified thermal storage.
Both solar and heat pump heating systems are innovative technologies for sustaining ecological heat generation. They are gaining more and more importance due to the accelerating pace of climate change and the rising cost of limited fossil resources. Against this background, a heating system …
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Formulation & Thermophysical Analysis of a Beeswax Microemulsion & The Experimental Calculation of its Heat Transfer Coefficient
… 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 microemulsion, …
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On the thermomechanics of localizing pseudoelastic transformations in NiTi materials and structures
… 6% strain and the release of about 12 kJ/kg of latent heat; both are recovered during the reverse transformation (pseudoelasticity). In a structure, the transformations occur inhomogeneously with two deformation regimes coexisting, separated by sharp fronts. Moreover, latent heat is …
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Improving parameterization of scalar transport through vegetation in a coupled ecosystem-atmosphere model
… canopies, taking field measurements of subcanopy latent heat flux, and testing alternative model formulations in constrained numerical experiments. A field campaign was conducted in a dense rainforest in Luquillo National Forest, Puerto Rico, to measure wind and fluxes with eddy covariance …
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Investigations of scalar transfer coefficients in fog during the Coupled Boundary Layers and Air Sea Transfer experiment : a case study
… in low to moderate wind conditions. For example, latent heat fluxes computed from data using direct covariance and bulk aerodynamic methods show that there is good agreement in unstable conditions when the latent heat flux values are generally positive. However, the agreement is relatively poor in …
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Blink and You'll Miss It: An Investigation into Surging on Flade Isblink, Greenland
… This implies an additional hydrological or heat input to allow the persistence of fast flow, the most likely candidate being surface meltwater and the associated latent heat release, leading to cryo-hydrologic warming. Model results indicate that the surge mechanism is a soft-bed thermal …
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