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    Mathematical Modeling of Solar Energy based Thermal Energy Storage for House Heating in Winter

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    Type
    Article
    Authors
    Soni, Neelesh
    Sharma, Debojit
    Rahman, Mustafa M. cc
    Hanmaiahgari, Prashanth R.
    Reddy, V. Mahendra
    KAUST Department
    Mechanical Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2020-12-25
    Embargo End Date
    2022-12-25
    Submitted Date
    2020-06-24
    Permanent link to this record
    http://hdl.handle.net/10754/666860
    
    Metadata
    Show full item record
    Abstract
    A novel solar thermal energy storage (TES) system for house heating purposes is modeled in the present study. The solar parabolic collector acts as a heat source to charge the TES using compressed CO2. The thermal energy in terms of sensible heat is stored in mild steel (MS) block wrapped in the thermal insulation material and buried in the ground at a certain depth. The stored energy will be used for house heating in the winter season. A mathematical model is developed to calculate the quantity of stored energy, consumption, and loss from TES along with the optimal storage volume of the block to fulfill the energy demand for house heating. Computational analysis of the 3D model is executed by adopting stipulated boundary conditions. Quantitative and qualitative studies of numerical results have been investigated for two cases: Initial charging and year-round performance. Numerical results revealed that the initial charging of the block takes in 55.2 days with maximum block temperature and stored energy as 324.2 °C and 2604 MJ, respectively. The average exergy efficiency and exergetic effectiveness of TES are observed as 49.9 % and 0.50, respectively. The partial charging of the block continued to compensate the heat losses after initial charging. The year-round performance of TES exhibits the reduction of stored energy by 71.6% at the end of January due to increased heating demand. Meanwhile, during a cyclic year, the average exergy efficiency and exergetic effectiveness of TES are noticed as 56.12 % and 0.76 respectively. The proposed TES has enough potential for year-round house heating since 28.4 % of net stored energy exists with the least block temperature of 106 °C. The rational economic study endorsed the proposed system 42.5% less expensive than the traditional heating methods for 50 years of utilization in addition to mitigating the average CO2 production of 5.655 Tons/year.
    Citation
    Soni, N., Sharma, D., Rahman, M. M., Hanmaiahgari, P. R., & Reddy, V. M. (2021). Mathematical Modeling of Solar Energy based Thermal Energy Storage for House Heating in Winter. Journal of Energy Storage, 34, 102203. doi:10.1016/j.est.2020.102203
    Sponsors
    Authors have not received any funding for this work. This work is conducted on the keen interest of PhD student (Neelesh Soni) and Supervisor (VMR) on energy storage and renewable energy. The authors would like to acknowledge the support received from KAUST (King Abdullah University of Science and Technology) for the high-performance computational facility. Authors also would thankful to Prof. Rajaram Lakkaraju (IIT Kharagpur) for valuable suggestions and proofreading.
    Publisher
    Elsevier BV
    Journal
    Journal of Energy Storage
    DOI
    10.1016/j.est.2020.102203
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S2352152X20320260
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.est.2020.102203
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program

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