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Belkacem Zeghmati - One of the best experts on this subject based on the ideXlab platform.

  • Experimental study of the sensible Heat storage in the water/TiO 2 nanofluid enclosed in an annular space
    Applied Thermal Engineering, 2017
    Co-Authors: Latifa El-kaddadi, Mohamed Asbik, Nadia Zari, Belkacem Zeghmati
    Abstract:

    Abstract This article is devoted to an experimental study of Heat transfer during a sensible Heat storage cycle (charging/discharging) in a vertical cylindrical system. The experimental setup consists of two cylindrical tanks filled respectively with hot and cold water, a test bench, and measurement instruments. The test bench, thermally insulated with glass wool, is also composed of two vertical concentric tubes whose annular space contains the used nanofluid (the mixture of distilled water and titanium dioxide nanoparticles). The Heat transfer fluid (HTF) flows in the upward direction of the inner tube (HTF pipe). Adequate methods were used to prepare titanium dioxide nanoparticles for which the diameter is less than 20 nm. Both convective Heat transfer coefficient between external inner tube wall and nanofluid, and Heat flux densities during storage cycle, were evaluated. The effect of nanofluid mass concentration (0.005, 0.01, 0.02 and 0.03 wt%) and the HTF mass flow rate on thermal Heat transfer coefficient and hence Heat flux densities were analyzed. Experimental results show that the average convective Heat transfer coefficient increases with increasing the mass flow rate, and it is improved by comparison with the fluid base (distilled water) when the nanofluid is considered. Furthermore, it has been observed that there is an optimal nanoparticles mass concentration corresponding to a maximal average convective Heat flux and also a maximal Recovered Heat flux density. Consequently, convective Heat transfer coefficient has a strong influence on the sensible Heat during a storage cycle (charging/discharging).

  • experimental study of the sensible Heat storage in the water tio 2 nanofluid enclosed in an annular space
    Applied Thermal Engineering, 2017
    Co-Authors: Latifa Elkaddadi, Mohamed Asbik, Nadia Zari, Belkacem Zeghmati
    Abstract:

    Abstract This article is devoted to an experimental study of Heat transfer during a sensible Heat storage cycle (charging/discharging) in a vertical cylindrical system. The experimental setup consists of two cylindrical tanks filled respectively with hot and cold water, a test bench, and measurement instruments. The test bench, thermally insulated with glass wool, is also composed of two vertical concentric tubes whose annular space contains the used nanofluid (the mixture of distilled water and titanium dioxide nanoparticles). The Heat transfer fluid (HTF) flows in the upward direction of the inner tube (HTF pipe). Adequate methods were used to prepare titanium dioxide nanoparticles for which the diameter is less than 20 nm. Both convective Heat transfer coefficient between external inner tube wall and nanofluid, and Heat flux densities during storage cycle, were evaluated. The effect of nanofluid mass concentration (0.005, 0.01, 0.02 and 0.03 wt%) and the HTF mass flow rate on thermal Heat transfer coefficient and hence Heat flux densities were analyzed. Experimental results show that the average convective Heat transfer coefficient increases with increasing the mass flow rate, and it is improved by comparison with the fluid base (distilled water) when the nanofluid is considered. Furthermore, it has been observed that there is an optimal nanoparticles mass concentration corresponding to a maximal average convective Heat flux and also a maximal Recovered Heat flux density. Consequently, convective Heat transfer coefficient has a strong influence on the sensible Heat during a storage cycle (charging/discharging).

Ivars Veidenbergs - One of the best experts on this subject based on the ideXlab platform.

  • Innovative scrubber technology model for domestic boiler application
    International Journal of Energy and Environmental Engineering, 2020
    Co-Authors: Dagnija Blumberga, Vivita Priedniece, Elvis Kalnins, Vladimirs Kirsanovs, Ivars Veidenbergs
    Abstract:

    Many treatment technologies exist for particulate matter capture from the flue gas. Heat recovery from flue gases is a significant advantage of scrubber technology, which promotes energy efficiency increase of the combustion unit. The amount of Recovered Heat depends on Heat and mass transfer in the scrubber. This paper presents the investigation of innovative small-scale flue gas treatment technology—fog unit. Households produce significant share of particulate matter in Europe. Therefore, there is a need to provide flue gas treatment technologies for domestic boilers in agreement with EU directive 2009/125/EC. Experimental research was done to identify the performance of proposed technology depending on inlet water flow rate, gas flow rate, water temperature, droplets diameter and water–gas flow ratio. The regression equations were developed based on performed data analysis. Equations can be used to predict the capacity of fog unit, outlet water temperature and outlet gas temperature.

  • Innovative scrubber technology model for domestic boiler application
    International Journal of Energy and Environmental Engineering, 2020
    Co-Authors: Dagnija Blumberga, Vivita Priedniece, Elvis Kalnins, Vladimirs Kirsanovs, Ivars Veidenbergs
    Abstract:

    Many treatment technologies exist for particulate matter capture from the flue gas. Heat recovery from flue gases is a significant advantage of scrubber technology, which promotes energy efficiency increase of the combustion unit. The amount of Recovered Heat depends on Heat and mass transfer in the scrubber. This paper presents the investigation of innovative small-scale flue gas treatment technology—fog unit. Households produce significant share of particulate matter in Europe. Therefore, there is a need to provide flue gas treatment technologies for domestic boilers in agreement with EU directive 2009/125/EC. Experimental research was done to identify the performance of proposed technology depending on inlet water flow rate, gas flow rate, water temperature, droplets diameter and water–gas flow ratio. The regression equations were developed based on performed data analysis. Equations can be used to predict the capacity of fog unit, outlet water temperature and outlet gas temperature.

Nadia Zari - One of the best experts on this subject based on the ideXlab platform.

  • Experimental study of the sensible Heat storage in the water/TiO 2 nanofluid enclosed in an annular space
    Applied Thermal Engineering, 2017
    Co-Authors: Latifa El-kaddadi, Mohamed Asbik, Nadia Zari, Belkacem Zeghmati
    Abstract:

    Abstract This article is devoted to an experimental study of Heat transfer during a sensible Heat storage cycle (charging/discharging) in a vertical cylindrical system. The experimental setup consists of two cylindrical tanks filled respectively with hot and cold water, a test bench, and measurement instruments. The test bench, thermally insulated with glass wool, is also composed of two vertical concentric tubes whose annular space contains the used nanofluid (the mixture of distilled water and titanium dioxide nanoparticles). The Heat transfer fluid (HTF) flows in the upward direction of the inner tube (HTF pipe). Adequate methods were used to prepare titanium dioxide nanoparticles for which the diameter is less than 20 nm. Both convective Heat transfer coefficient between external inner tube wall and nanofluid, and Heat flux densities during storage cycle, were evaluated. The effect of nanofluid mass concentration (0.005, 0.01, 0.02 and 0.03 wt%) and the HTF mass flow rate on thermal Heat transfer coefficient and hence Heat flux densities were analyzed. Experimental results show that the average convective Heat transfer coefficient increases with increasing the mass flow rate, and it is improved by comparison with the fluid base (distilled water) when the nanofluid is considered. Furthermore, it has been observed that there is an optimal nanoparticles mass concentration corresponding to a maximal average convective Heat flux and also a maximal Recovered Heat flux density. Consequently, convective Heat transfer coefficient has a strong influence on the sensible Heat during a storage cycle (charging/discharging).

  • experimental study of the sensible Heat storage in the water tio 2 nanofluid enclosed in an annular space
    Applied Thermal Engineering, 2017
    Co-Authors: Latifa Elkaddadi, Mohamed Asbik, Nadia Zari, Belkacem Zeghmati
    Abstract:

    Abstract This article is devoted to an experimental study of Heat transfer during a sensible Heat storage cycle (charging/discharging) in a vertical cylindrical system. The experimental setup consists of two cylindrical tanks filled respectively with hot and cold water, a test bench, and measurement instruments. The test bench, thermally insulated with glass wool, is also composed of two vertical concentric tubes whose annular space contains the used nanofluid (the mixture of distilled water and titanium dioxide nanoparticles). The Heat transfer fluid (HTF) flows in the upward direction of the inner tube (HTF pipe). Adequate methods were used to prepare titanium dioxide nanoparticles for which the diameter is less than 20 nm. Both convective Heat transfer coefficient between external inner tube wall and nanofluid, and Heat flux densities during storage cycle, were evaluated. The effect of nanofluid mass concentration (0.005, 0.01, 0.02 and 0.03 wt%) and the HTF mass flow rate on thermal Heat transfer coefficient and hence Heat flux densities were analyzed. Experimental results show that the average convective Heat transfer coefficient increases with increasing the mass flow rate, and it is improved by comparison with the fluid base (distilled water) when the nanofluid is considered. Furthermore, it has been observed that there is an optimal nanoparticles mass concentration corresponding to a maximal average convective Heat flux and also a maximal Recovered Heat flux density. Consequently, convective Heat transfer coefficient has a strong influence on the sensible Heat during a storage cycle (charging/discharging).

Mohamed Asbik - One of the best experts on this subject based on the ideXlab platform.

  • Experimental study of the sensible Heat storage in the water/TiO 2 nanofluid enclosed in an annular space
    Applied Thermal Engineering, 2017
    Co-Authors: Latifa El-kaddadi, Mohamed Asbik, Nadia Zari, Belkacem Zeghmati
    Abstract:

    Abstract This article is devoted to an experimental study of Heat transfer during a sensible Heat storage cycle (charging/discharging) in a vertical cylindrical system. The experimental setup consists of two cylindrical tanks filled respectively with hot and cold water, a test bench, and measurement instruments. The test bench, thermally insulated with glass wool, is also composed of two vertical concentric tubes whose annular space contains the used nanofluid (the mixture of distilled water and titanium dioxide nanoparticles). The Heat transfer fluid (HTF) flows in the upward direction of the inner tube (HTF pipe). Adequate methods were used to prepare titanium dioxide nanoparticles for which the diameter is less than 20 nm. Both convective Heat transfer coefficient between external inner tube wall and nanofluid, and Heat flux densities during storage cycle, were evaluated. The effect of nanofluid mass concentration (0.005, 0.01, 0.02 and 0.03 wt%) and the HTF mass flow rate on thermal Heat transfer coefficient and hence Heat flux densities were analyzed. Experimental results show that the average convective Heat transfer coefficient increases with increasing the mass flow rate, and it is improved by comparison with the fluid base (distilled water) when the nanofluid is considered. Furthermore, it has been observed that there is an optimal nanoparticles mass concentration corresponding to a maximal average convective Heat flux and also a maximal Recovered Heat flux density. Consequently, convective Heat transfer coefficient has a strong influence on the sensible Heat during a storage cycle (charging/discharging).

  • experimental study of the sensible Heat storage in the water tio 2 nanofluid enclosed in an annular space
    Applied Thermal Engineering, 2017
    Co-Authors: Latifa Elkaddadi, Mohamed Asbik, Nadia Zari, Belkacem Zeghmati
    Abstract:

    Abstract This article is devoted to an experimental study of Heat transfer during a sensible Heat storage cycle (charging/discharging) in a vertical cylindrical system. The experimental setup consists of two cylindrical tanks filled respectively with hot and cold water, a test bench, and measurement instruments. The test bench, thermally insulated with glass wool, is also composed of two vertical concentric tubes whose annular space contains the used nanofluid (the mixture of distilled water and titanium dioxide nanoparticles). The Heat transfer fluid (HTF) flows in the upward direction of the inner tube (HTF pipe). Adequate methods were used to prepare titanium dioxide nanoparticles for which the diameter is less than 20 nm. Both convective Heat transfer coefficient between external inner tube wall and nanofluid, and Heat flux densities during storage cycle, were evaluated. The effect of nanofluid mass concentration (0.005, 0.01, 0.02 and 0.03 wt%) and the HTF mass flow rate on thermal Heat transfer coefficient and hence Heat flux densities were analyzed. Experimental results show that the average convective Heat transfer coefficient increases with increasing the mass flow rate, and it is improved by comparison with the fluid base (distilled water) when the nanofluid is considered. Furthermore, it has been observed that there is an optimal nanoparticles mass concentration corresponding to a maximal average convective Heat flux and also a maximal Recovered Heat flux density. Consequently, convective Heat transfer coefficient has a strong influence on the sensible Heat during a storage cycle (charging/discharging).

R V Seeniraj - One of the best experts on this subject based on the ideXlab platform.

  • experimental investigation on Heat recovery from diesel engine exhaust using finned shell and tube Heat exchanger and thermal storage system
    Applied Energy, 2011
    Co-Authors: V Pandiyarajan, Chinna M Pandian, E Malan, R Velraj, R V Seeniraj
    Abstract:

    Abstract The exhaust gas from an internal combustion engine carries away about 30% of the Heat of combustion. The energy available in the exit stream of many energy conversion devices goes as waste, if not utilized properly. The major technical constraint that prevents successful implementation of waste Heat recovery is due to its intermittent and time mismatched demand and availability of energy. In the present work, a shell and finned tube Heat exchanger integrated with an IC engine setup to extract Heat from the exhaust gas and a thermal energy storage tank used to store the excess energy available is investigated in detail. A combined sensible and latent Heat storage system is designed, fabricated and tested for thermal energy storage using cylindrical phase change material (PCM) capsules. The performance of the engine with and without Heat exchanger is evaluated. It is found that nearly 10–15% of fuel power is stored as Heat in the combined storage system, which is available at reasonably higher temperature for suitable application. The performance parameters pertaining to the Heat exchanger and the storage tank such as amount of Heat Recovered, Heat lost, charging rate, charging efficiency and percentage energy saved are evaluated and reported in this paper.