Heat Transfer and Storage

Nitrate salt is important heat transfer and storage medium in solar thermal power system, but nitrate salt leakage and pollution in groundwater is seldom investigated. In this paper, the nitrate salt leakage and migration in the soil after rainfall are simulated and analyzed. During the nitrate leakage process, the liquid nitrate will solidify, and then a thin solidification layer of nitrate forms. According to the simulation result, the radius of the leakage opening mainly affects the radius of nitrate solidification layer, while the leakage velocity will influence the radius and thickness of salt layer. During the nitrate migration process after rainfall, the nitrate will gradually migrate to the groundwater, and the final migration domain of nitrate in the soil will be mainly determined by the radius of nitrate solidification layer.

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Preparation and Thermal Properties of High-Purified Molten Nitrate Salt Materials with Heat Transfer and Storage

High Temperature Materials and Processes ◽

10.1515/htmp-2014-0147 ◽

2015 ◽

Vol 34 (8) ◽

Cited By ~ 2

Author(s):

Hongtao Zhang ◽

Youjing Zhao ◽

Jingli Li ◽

Lijie Shi ◽

Min Wang

Keyword(s):

Heat Transfer ◽

Thermal Stability ◽

Thermal Properties ◽

Molten Salts ◽

Operating Temperature ◽

Nitrate Salt ◽

Solar Salt ◽

And Storage ◽

Thermal Stability Of ◽

Operating Temperature Range

AbstractThis paper focuses on thermal stability of molten salts, operating temperature range and latent heat of molten salts at a high temperature. In this experiment, multi-component molten salts (purified Solar Salt) composed of purified NaNO

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HEAT TRANSFER AND EXTERNAL QUALITY ATTRIBUTES OF 'REGAL SEEDLESS' TABLE GRAPES INSIDE MULTI LAYERED PACKAGING DURING POSTHARVEST COOLING AND STORAGE

Acta Horticulturae ◽

10.17660/actahortic.2013.1007.18 ◽

2013 ◽

pp. 189-195 ◽

Cited By ~ 1

Author(s):

M.E.K. Ngcobo ◽

M.A. Delele ◽

U.L. Opara ◽

G.D. Thiart ◽

C.J. Meyer

Keyword(s):

Heat Transfer ◽

Quality Attributes ◽

External Quality ◽

Table Grapes ◽

And Storage

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Heat Transfer Parameterization towards Enhancing Shelf Life of Vegetables in Low Cost Cold Chain with FACCC

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.d1106.029420 ◽

2020 ◽

Vol 9 (4) ◽

pp. 822-829

Keyword(s):

Heat Transfer ◽

Nusselt Number ◽

Shelf Life ◽

Temperature Control ◽

Low Cost ◽

Surface Heat ◽

Cold Chain ◽

Air Flow Rate ◽

Surface Heat Transfer Coefficient ◽

And Storage

India is the second-largest vegetable producing country after China. It is observed that there is a huge loss of vegetables due to the lack of low-cost cold chain for its storage & transportation after harvesting from agriculture land to vegetable market. The shelf life of these vegetables is less due to poor temperature control during transportation and storage. If vegetables are not maintained at their prudent temperature, then they will lose their potency, which will lead to enormous economic loss. Therefore, it is observed that temperature control of vegetables and their heat transfer characteristics are a major factor to maintain potency and increase their shelf life. This paper proposed a low-cost design of FACCC for temperature control of vegetables during transportation and storage with the help of Chillers. Further, the effect of air velocity on heat transfer rate and Nusselt number of various vegetables was evaluated to predict the performance of FACCC for enhancing the shelf life of vegetables.Thermophysical characteristics of these vegetables have been calculated at different air flow rate with the help of Reynolds analogy as a function of Stanton Number, Reynold’s Number and Prandtl Number.The airflow rate was maintained between 0.2065 m/s - 0.413 m/s inside FACCC. Experimental study reveals that the average Nusselt Number of these vegetables lies in the range of 57.9 - 115.74 and the range of Surface heat transfer coefficient is 54.48-108.96 W/m2K. Validation of FACCC performance has been done by comparing the heat transfer rate and Nusselt number from published literature. These results are obtained by temperature control of vegetables by varying air flow rate through four fans fitted inside FACCC. It results in higher shelf life due to favourable maintenance of thermodynamic parameters such as surface heat transfer coefficient, Nusselt number, Reynold number and preferable temperature for specific commodities.Thus, the proposed FACCC model can be an effective tool for enhancement of low-cost cold chain for vegetables in future.

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Dynamic Behavior of a Solar Heated Receiver of a Gas Turbine Plant

Volume 4: Heat Transfer; Electric Power ◽

10.1115/86-gt-250 ◽

1986 ◽

Author(s):

K. Bammert ◽

J. Johanning

Keyword(s):

Heat Transfer ◽

Gas Turbine ◽

Dynamic Behavior ◽

Calculation Method ◽

Sufficient Accuracy ◽

Turbine Plant ◽

Parabolic Dish ◽

Gas Turbine Plant ◽

And Storage ◽

Storage Processes

The mainly instationary operation of a solar heated receiver can be simulated with sufficient accuracy only if data about the dynamic behavior are available. For this reason, the dynamic behavior of a solar cavity receiver with parabolic dish collector is investigated. The development of a mathematical simulation considering heat transfer and storage processes is presented and the procedure for a numerical solution is illustrated. The performance of the calculation method is finally demonstrated by simulating the passage of a cloud.

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