The Experts below are selected from a list of 111 Experts worldwide ranked by ideXlab platform

Abdul Jabbar N. Khalifa - One of the best experts on this subject based on the ideXlab platform.

  • a comparative performance study of some Thermal Storage materials used for solar space heating
    Energy and Buildings, 2009
    Co-Authors: Abdul Jabbar N. Khalifa, Ehsan F Abbas
    Abstract:

    One of the most common methods used in passive heating is the utilization of a massive Wall for heat Storage. Many factors affect the performance of the Wall, such as the thickness and the media used for heat Storage. A numerical study has been conducted on a zone heated by a Thermal Storage Wall. Three different Storage materials are examined, namely concrete, the hydrated salt CaCl2·6H2O and paraffin wax (N-eicosane). A numerical model is presented in this paper which judges the suitability of these materials as Thermal Storage mediums under the actual weather conditions of Iraq. For that purpose, the room temperature fluctuation in the zone is evaluated for each material using different thickness for each Wall. The study concluded that an 8-cm-thick Storage Wall made from the hydrated salt is capable of maintaining the comfort temperature in the zone with the least room temperature fluctuation.

  • A study on a passively heated single-zone building using a Thermal Storage Wall
    Energy Conversion and Management, 1998
    Co-Authors: Abdul Jabbar N. Khalifa
    Abstract:

    Abstract The Thermal performance of a passively heated zone is predicted by calculating the transient temperature variation of each node in the system using a finite-difference model. The sensitivity of the zone air temperature to the change in some of the zone features is examined. Some of these parameters included the thickness of the Walls, using constant and variable heat transfer coefficients, having controlled and uncontrolled thermocirculation in a vented Storage Wall.

Wei Liang Wang - One of the best experts on this subject based on the ideXlab platform.

  • Investigation on the influencing factors of energy consumption and Thermal comfort for a passive solar house with water Thermal Storage Wall
    Energy and Buildings, 2013
    Co-Authors: Wei Liang Wang, Zhe Tian, Yan Ding
    Abstract:

    Abstract A passive solar house (PSH) could fully receive and store the incident radiation by the rational arrangement of the building structure and the utility of the massive construction materials. The influence of water Thermal Storage Wall (WTSW) on the indoor Thermal environment is analyzed in this paper. Besides, different parts of the building envelope exert varying degrees of impact on the building energy consumption and indoor Thermal comfort. Research on the influencing factors could provide references for the building energy conservation design and the retrofit of existing buildings. A PSH with interior Walls of WTSW is studied, which is currently being used in North China. Field measurements were carried out in the reference building. TRNSYS was used to simulate the variation of indoor air temperature. The results of simulation and orthogonal analysis indicate that compared to traditional Wall the PSH equipped with WTSW can reduce yearly energy consumption by 8.6% and improve indoor Thermal comfort evaluation index by 12.9%. Meanwhile, significance of four different structural parameters (namely the shape coefficient, building orientation, glazing ratio of the south Wall and the interior Wall structure) respectively on the energy consumption and Thermal comfort is obtained by the variance analysis.

  • Investigation on a Passive Solar House Equipped with Water Thermal Storage Wall
    Applied Mechanics and Materials, 2012
    Co-Authors: Wei Liang Wang, Zhe Tian, Xiao Lei Niu
    Abstract:

    The numerical simulation method is employed in this paper to study the indoor Thermal performance of an existent passive solar house, south internal Wall of which is equipped with water Thermal Storage tanks. The actual measured meteorological data of 2010 in Tianjin is applied in this study to obtain the hourly indoor temperature, and the indoor condition is assessed by the adaptive Thermal comfort model. The results indicate that, cooling measures are not required during the summer in Tianjin weather condition when the water Thermal Storage Wall is used combined with natural ventilation technology, Thermal Storage effect of the Wall can reduce the indoor maximum temperature of 4 °C while increase the minimum temperature of 3°C, and make regulation of the heating system simple and feasible in the winter.

Yan Ding - One of the best experts on this subject based on the ideXlab platform.

  • Investigation on the influencing factors of energy consumption and Thermal comfort for a passive solar house with water Thermal Storage Wall
    Energy and Buildings, 2013
    Co-Authors: Wei Liang Wang, Zhe Tian, Yan Ding
    Abstract:

    Abstract A passive solar house (PSH) could fully receive and store the incident radiation by the rational arrangement of the building structure and the utility of the massive construction materials. The influence of water Thermal Storage Wall (WTSW) on the indoor Thermal environment is analyzed in this paper. Besides, different parts of the building envelope exert varying degrees of impact on the building energy consumption and indoor Thermal comfort. Research on the influencing factors could provide references for the building energy conservation design and the retrofit of existing buildings. A PSH with interior Walls of WTSW is studied, which is currently being used in North China. Field measurements were carried out in the reference building. TRNSYS was used to simulate the variation of indoor air temperature. The results of simulation and orthogonal analysis indicate that compared to traditional Wall the PSH equipped with WTSW can reduce yearly energy consumption by 8.6% and improve indoor Thermal comfort evaluation index by 12.9%. Meanwhile, significance of four different structural parameters (namely the shape coefficient, building orientation, glazing ratio of the south Wall and the interior Wall structure) respectively on the energy consumption and Thermal comfort is obtained by the variance analysis.

Ehsan F Abbas - One of the best experts on this subject based on the ideXlab platform.

  • a comparative performance study of some Thermal Storage materials used for solar space heating
    Energy and Buildings, 2009
    Co-Authors: Abdul Jabbar N. Khalifa, Ehsan F Abbas
    Abstract:

    One of the most common methods used in passive heating is the utilization of a massive Wall for heat Storage. Many factors affect the performance of the Wall, such as the thickness and the media used for heat Storage. A numerical study has been conducted on a zone heated by a Thermal Storage Wall. Three different Storage materials are examined, namely concrete, the hydrated salt CaCl2·6H2O and paraffin wax (N-eicosane). A numerical model is presented in this paper which judges the suitability of these materials as Thermal Storage mediums under the actual weather conditions of Iraq. For that purpose, the room temperature fluctuation in the zone is evaluated for each material using different thickness for each Wall. The study concluded that an 8-cm-thick Storage Wall made from the hydrated salt is capable of maintaining the comfort temperature in the zone with the least room temperature fluctuation.

Paulo Santos - One of the best experts on this subject based on the ideXlab platform.

  • Trombe Wall Thermal Behavior and Energy Efficiency of a Light Steel Frame Compartment: Experimental and Numerical Assessments
    Energies, 2020
    Co-Authors: Victor Lohmann, Paulo Santos
    Abstract:

    Buildings are seeking renewable energy sources (e.g., solar) and passive devices, such as Trombe Walls. However, the Thermal performance of Trombe Walls depends on many factors. In this work, the Thermal behavior and energy efficiency of a Trombe Wall in a lightweight steel frame compartment were evaluated, making use of in situ measurements and numerical simulations. Measurements were performed inside two real scale experimental identical cubic modules, exposed to natural exterior weather conditions. Simulations were made using validated advanced dynamic models. The winter Trombe Wall benefits were evaluated regarding indoor air temperature increase and heating energy reduction. Moreover, a Thermal behavior parametric study was performed. Several comparisons were made: (1) Sunny and cloudy winter week Thermal behavior; (2) Office and residential space use heating energy; (3) Two heating set-points (20 °C and 18 °C); (4) Thickness of the Trombe Wall air cavity; (5) Thickness of the Thermal Storage Wall; (6) Dimensions of the interior upper/lower vents; (7) Material of the Thermal Storage Wall. It was found that a Trombe Wall device could significantly improve the Thermal behavior and reduce heating energy consumption. However, if not well designed and controlled (e.g., to mitigate nocturnal heat losses), the Trombe Wall Thermal and energy benefits could be insignificant and even disadvantageous.