TY - JOUR
T1 - Mathematical Modeling of Solar Energy based Thermal Energy Storage for House Heating in Winter
AU - Soni, Neelesh
AU - Sharma, Debojit
AU - Rahman, Mustafa M.
AU - Hanmaiahgari, Prashanth R.
AU - Reddy, V. Mahendra
N1 - KAUST Repository Item: Exported on 2021-01-12
Acknowledgements: 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.
PY - 2020/12/25
Y1 - 2020/12/25
N2 - 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.
AB - 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.
UR - http://hdl.handle.net/10754/666860
UR - https://linkinghub.elsevier.com/retrieve/pii/S2352152X20320260
UR - http://www.scopus.com/inward/record.url?scp=85098764903&partnerID=8YFLogxK
U2 - 10.1016/j.est.2020.102203
DO - 10.1016/j.est.2020.102203
M3 - Article
SN - 2352-152X
VL - 34
SP - 102203
JO - Journal of Energy Storage
JF - Journal of Energy Storage
ER -
