Dimensionless Evaporation Rate from Free Water Surface at Tubular Artificial Flow

Poós, Tibor; Varju, Evelin

doi:10.1016/j.egypro.2017.03.1069

Cited by 10 publications

(4 citation statements)

References 11 publications

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“…Should the pipe still fail, the repair is less complicated than for pipes embedded in Research on combined building-energy systems is related to several technical fields in which the results from various scientific and professional publications need to be correlated. Therefore, we list some relevant publications on which we base our research [6][7][8][9][10][11][12][13][14][15][16][17][18][19].…”

Section: Discussionmentioning

confidence: 99%

Contribution to Active Thermal Protection Research—Part 2 Verification by Experimental Measurement

et al. 2023

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This article is closely related to the oldest article titled Contribution to Active Thermal Protection Research—Part 1 Analysis of Energy Functions by Parametric Study. It is a continuation of research that focuses on verifying the energy potential and functions of so-called active thermal protection (ATP). As mentioned in the first part, the amount of thermal energy consumed for heating buildings is one of the main parameters that determine their future design, especially the technical equipment. The issue of reducing the consumption of this energy is implemented in various ways, such as passive thermal protection, i.e., by increasing the thermal insulation parameters of the individual materials of the building envelope or by optimizing the operation of the technical equipment of the buildings. On the other hand, there are also methods of active thermal protection that aim to reduce heat leakage through nontransparent parts of the building envelope. This methodology is based on the validation of the results of a parametric study of the dynamic thermal resistance (DTR) and the heat fluxes to the interior and exterior from the ATP for the investigated envelope of the experimental house EB2020 made of aerated concrete blocks, presented in the article “Contribution to the research on active thermal protection—Part 1, Analysis of energy functions by the parametric study”, by long-term experimental measurements. The novelty of the research lies in the involvement of variant-peak heat/cooling sources in combination with RES and in creating a new, original way of operating energy systems with the possibility of changing and combining the operating modes of the ATP. We have verified the operation of the experimental house in the energy functions of thermal barrier, heating/cooling with RES, and without RES and ATP. The energy saving when using RES and ATP is approximately 37%. Based on the synthesis and induction of analogous forms of the results of previous research into recommendations for the development of building envelopes with energy-active elements, we present further possible outcomes in the field of ATP, as well as already realized and upcoming prototypes of thermal insulation panels.

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Section: Discussionmentioning

confidence: 99%

Contribution to Active Thermal Protection Research—Part 2 Verification by Experimental Measurement

et al. 2023

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“…Figure 1 shows the comparison of some correlations with the data of Poos and Varju (2017) in the natural convection dominant regime. The Shah (2018) model is seen to be in almost perfect agreement with these data while others have considerably larger deviations.…”

Section: Discussionmentioning

confidence: 99%

“…Data of Poos and Varju (2017) in the natural convection dominant regime compared to some correlations.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of methods for prediction of evaporation from water pools

Shah

2021

Journal of Building Physics

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Calculation of evaporation is needed in many applications including swimming pools, water reservoirs, nuclear fuel pools, pools for rejection of heat from refrigeration systems, process tanks, etc. Hence accurate methods for prediction of evaporation are needed. Many prediction methods have been published including analytical models and empirical correlations. In the present study, 18 published prediction methods are compared to a very wide-ranging database which includes data from laboratory scale studies, swimming pools, and fuel pools in nuclear power plants. The data are from 25 sources. The range of data includes air temperatures from 6°C to 200°C, water temperatures from 7.1°C to 94.2°C, relative humidity from 0.21% to 98%, and air velocity from 0 to 8.5 m/s. The accuracy of prediction methods is examined for conditions in which natural convection dominates, that in which forced convection dominates, and that in which natural convection is absent. The results are reported and discussed. Recommendations are made for application.

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“…The known publications as Hofman (1932) and Mackay and van Wesenbeeck (2014) reported for the evaporation rate of solvents, but only in case of still surrounding air. There are many studies (Carrier 1918;Rohwer 1931;Smith et al 1994;Poósa and Varju 2017) for water evaporation from free surfaces. They reported many semi-empirical correlations that take into account the velocity of surrounding air.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the vapour evaporation from the surface of pure organic solvents and their mixtures

Akterian

2020

FSAB

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Some perfumery and cosmetic products represent mixtures and they include large parts of solvents as ethanol, water, acetone and isopropyl alcohol. Solvents as pure hexane and ethanol-water mixtures are used in the solvent extraction of oil-bearing plant materials and herbs. The goal of this study was the emissions of volatile solvents released during above pointed productions to be evaluated. It was found that the specific evaporation rate varies from 1.2 kg/(m2.h) (for pure methoxy-propanol) to 66 kg/(m2.h) (for three-component mixture including acetone). The evaporation rate is higher for solvents with higher vapour pressure and at a higher velocity of surrounding air. The evaporation is less intensive from pure solvents than their mixtures. The time for the evaporation from a film of solvents and their mixtures was also evaluated. It varies from 10 s (for isopropyl alcohol) to 9 min (for methoxy-propanol).Practical applicationsThe evaluation of volatile solvent emissions is a mandatory step in the design of plants for manufacturing perfumery, cosmetics, deriving essential and edible oils by means of organic solvents. Most of volatile organic solvents used are highly flammable and healthy hazardous. For assuring fire safety and safety-health working conditions and environment the ventilation system must be designed on the base of this emission evaluated. The obtained results were applied for plant design of the company “Star Nails Bulgaria” Ltd. Plovdiv.

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Dimensionless Evaporation Rate from Free Water Surface at Tubular Artificial Flow

Cited by 10 publications

References 11 publications

Contribution to Active Thermal Protection Research—Part 2 Verification by Experimental Measurement

Contribution to Active Thermal Protection Research—Part 2 Verification by Experimental Measurement

Evaluation of methods for prediction of evaporation from water pools

Evaluating the vapour evaporation from the surface of pure organic solvents and their mixtures

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