The Experts below are selected from a list of 282 Experts worldwide ranked by ideXlab platform

G.n. Tiwari - One of the best experts on this subject based on the ideXlab platform.

  • Solar energy fundamentals design modelling and applications
    2002
    Co-Authors: G.n. Tiwari
    Abstract:

    Introduction. Heat Transfer: Concepts and Definitions.Flat-Plate Collectors. Evacuated Solar Collector. Solar Water Heating System. Solar Air Heaters. Solar Crop Drying. Solar Concentrators. Solar Distillation. Solar House. Other Applications.Energy Storage. Photovoltaic Systems. Economic Analysis. Appendices.

  • Thermal evaluation of Solarium-cum-passive Solar House
    Energy Conversion and Management, 1991
    Co-Authors: G.n. Tiwari, Sanjay Kumar
    Abstract:

    Abstract The thermal analysis of a Solarium-cum-passive Solar House, based on energy balances of its different components, has been presented. The effects of link walls, viz. air collector, water wall and transwall, and isothermal mass have been incorporated in the analysis in addition to system as well as climatical parameters. Analytical expressions for room temperatures of the Solarium and living space have been derived. Numerical calculations have been carried out for a typical day of Srinagar to evaluate the thermal performance of the systems, along with optimization of the Solarium for best thermal load levelling for the living room. Some of the results are as follows: (i) the transwall, as a link wall, gives better results and (ii) the Solarium room temperature is higher during the day and becomes lower during the night in comparison with the living room temperature.

  • Design of a non-airconditioned passive Solar House for the cold climate of Srinagar
    Building and Environment, 1991
    Co-Authors: G.n. Tiwari
    Abstract:

    Abstract The design of a passive Solar House for the harsh cold climate of Srinagar in Jammu and Kashmir, India is presented. The concept of a water drum wall and transwall for heating the House has been incorporated in the design. A transient analysis based on the energy balance of different components of the proposed design has been developed by incorporating the effect of an isothermal mass within the House. Numerical computations have been carried out for a typical day in Srinagar for consecutive days to evaluate the performance of the proposed design in terms of inside room temperature. The following conclusions are drawn: 1. (i) the cyclic steady state condition is reached after 3 days and 2. (ii) the required load levelling for thermal comfort is achieved for a higher isothermal mass in the case of the transwall.

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.

Khaled Galal - One of the best experts on this subject based on the ideXlab platform.

  • modeling design and thermal performance of a bipv t system thermally coupled with a ventilated concrete slab in a low energy Solar House part 1 bipv t system and House energy concept
    Solar Energy, 2010
    Co-Authors: Yuxiang Chen, Andreas K. Athienitis, Khaled Galal
    Abstract:

    Abstract This paper is the first of two papers that describe the modeling, design, and performance assessment based on monitored data of a building-integrated photovoltaic-thermal (BIPV/T) system thermally coupled with a ventilated concrete slab (VCS) in a prefabricated, two-storey detached, low energy Solar House. This House, with a design goal of near net-zero annual energy consumption, was constructed in 2007 in Eastman, Quebec, Canada – a cold climate area. Several novel Solar technologies are integrated into the House and with passive Solar design to reach this goal. An air-based open-loop BIPV/T system produces electricity and collects heat simultaneously. Building-integrated thermal mass is utilized both in passive and active forms. Distributed thermal mass in the direct gain area and relatively large south facing triple-glazed windows (about 9% of floor area) are employed to collect and store passive Solar gains. An active thermal energy storage system (TES) stores part of the collected thermal energy from the BIPV/T system, thus reducing the energy consumption of the House ground source heat pump heating system. This paper focuses on the BIPV/T system and the integrated energy concept of the House. Monitored data indicate that the BIPV/T system has a typical efficiency of about 20% for thermal energy collection, and the annual space heating energy consumption of the House is about 5% of the national average. A thermal model of the BIPV/T system suitable for preliminary design and control of the airflow is developed and verified with monitored data.

  • design and simulation for a Solar House with building integrated photovoltaic thermal system and thermal storage
    2008
    Co-Authors: Yuxiang Chen, Andreas K. Athienitis, Khaled Galal, Y Poissant
    Abstract:

    Building integrated photovoltaic-thermal systems (BIPV/T) that pre-heat ambient air may be used in combination with ventilated concrete slabs for thermal storage purposes. This is one of many feasible ways to maximize Solar energy utilization. This paper describes the design and simulation of a Solar House with an innovative BIPV/T system and ventilated concrete slab. This House is to be built by a Canadian prefabricated-home manufacturer for Canada’s EQuilibrium Housing demonstration initiative. The BIPV/T system can harvest a considerable amount of useful heat; however, some of this energy typically needs to be stored for later use with an appropriate thermal storage design. A concrete thermal storage system is utilized for this purpose. Simulation results are presented from a transient finite difference model for the House, including the BIPV/T system and ventilated concrete slab.

Zhe Tian - 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.