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

Soni, Neelesh; Sharma, Debojit; Rahman, Mustafa Mutiur; Hanmaiahgari, Prashanth Reddy; Reddy, V. Mahendra

doi:10.1016/j.est.2020.102203

Cited by 18 publications

(27 citation statements)

References 60 publications

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“…The buffer tank's energy balance is illustrated in Equation (12), where,

{\overset{Q}{true}}_{italicin}

(W) and

{\overset{Q}{true}}_{italicout}

(W) signify the energy of inflowing and leaving air in the control volume (BT). However,

{\overset{Q}{true}}_{italicBT}

(W) refers to the rate of energy accumulated in the BT's control volume 14,34 . The explicit terms are expressed in Equations (13) to (18) and as follows:

{\overset{Q}{true}}_{italicin} = {\overset{Q}{true}}_{air, in} = \int_{T_{\infty}}^{T_{italicair, italicin}} {\overset{m}{true}}_{air, in} C_{p_{a}} dT,

\sum {\overset{Q}{true}}_{italicout} = {\overset{Q}{true}}_{air, out} + {\overset{Q}{true}}_{italiclosses},

{\overset{Q}{true}}_{air, out} = \int_{T_{\infty}}^{T_{italicair, italicout}} {\overset{m}{true}}_{air, out} C_{p_{a}} dT,

{\overset{Q}{true}}_{italiclosses} = ({\dot{q}}_{Convection} + {\dot{q}}_{Radiation}) A_{italicBT} = {\bar{h} ({\overset{T}{true}}_{italicBT} - T_{italic∞}) + ϵ σ (T_{S}^{4} - T_{normal∞}^{4})}<...

…”

Section: Mathematical Modelingmentioning

confidence: 99%

“…Furthermore,

refers to diffusion flux of j th species, and

denotes supplementary volumetric heat source which is deserted in this case. 14 , 18 …”

Section: Mathematical Modelingmentioning

confidence: 99%

“…Porous materials (PM) have been used in a wide range of heating applications for the augmentation of fluid's thermal performance. 14 , 15 , 16 , 17 , 18 The PM ensures proper mixing by offering a higher surface‐to‐volume ratio to enhance the heat transfer between solid and gas phases. 19 However, the pressure drop inside the porous zone demands more pumping power which can be suppressed considering the optimum porosity of PM.…”

Section: Introductionmentioning

confidence: 99%

“… 16 , 17 Researchers have extensively used metal foams, porous sintered metal, and ceramics in porous‐based air heating equipment. 14 , 20 , 21 Abo‐Elfadl et al 20 have investigated the PM‐based air heating in a tubular solar air heater at variable mass flow conditions and noticed 8.9% and 8.2% improvement in energy and exergy efficiencies of the tubular air heater. In the same context, Hernandez et al 21 were conducted a numerical analysis of a solar air heating collector with a porous steel matrix, and the air distribution in the collector, and the heat transfer characteristics were improved.…”

Section: Introductionmentioning

confidence: 99%

“…In the milieu of energy sources, solar PV/thermal established their potential utility in the domestic and industrial applications as a replacement of conventional energy with zero carbon formation. 14 Solar‐powered installations are drastically growing in India due to adequate solar potential reaching 40.09 GW (March 2021). 23 Solar PV publicized its utility in numerous applications like lighting, pumping, air conditioning, space heating, water heating, and air heating.…”

Section: Introductionmentioning

confidence: 99%

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Novel thermal treatment model to decontaminate airborne SARS Cov‐2 virus for residential and commercial buildings

2022

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In the COVID‐19 pandemic, control of airborne virus transmission is exceptionally challenging as it is attached to suspended particles in the air and stays for an extended time. Air contaminated with airborne viruses holds a substantial risk for household transmission. In this study, a novel thermal treatment system is modeled based on porous heating for the decontamination of airborne SARS‐Cov‐2. The model includes an air heating domain, insulated chamber, buffer tank and heat exchanger. The airborne SARS‐Cov‐2 is decontaminated when passing through a porous heat pipe and the insulated chamber for an anticipated dwelling period of more than 5 min at 105°C and further stored in a buffer tank for natural cooling. The obligatory decontaminated air is allowed in the residential space under ambient conditions passing through a heat exchanger. The numerical investigation of the porous pipe model at different L/D ratios with altered porosities aims to establish the best‐performing porous domain. Besides this, the buffer tank is intended to maintain buffer storage of the treated air and significant natural cooling before passing to the heat exchanger. A solar PV module is proposed to meet the prerequisite energy requirements of the equipped devices.

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“…The buffer tank's energy balance is illustrated in Equation (12), where,

{\overset{Q}{true}}_{italicin}

(W) and

{\overset{Q}{true}}_{italicout}

(W) signify the energy of inflowing and leaving air in the control volume (BT). However,

{\overset{Q}{true}}_{italicBT}

(W) refers to the rate of energy accumulated in the BT's control volume 14,34 . The explicit terms are expressed in Equations (13) to (18) and as follows:

{\overset{Q}{true}}_{italicin} = {\overset{Q}{true}}_{air, in} = \int_{T_{\infty}}^{T_{italicair, italicin}} {\overset{m}{true}}_{air, in} C_{p_{a}} dT,

\sum {\overset{Q}{true}}_{italicout} = {\overset{Q}{true}}_{air, out} + {\overset{Q}{true}}_{italiclosses},

{\overset{Q}{true}}_{air, out} = \int_{T_{\infty}}^{T_{italicair, italicout}} {\overset{m}{true}}_{air, out} C_{p_{a}} dT,

{\overset{Q}{true}}_{italiclosses} = ({\dot{q}}_{Convection} + {\dot{q}}_{Radiation}) A_{italicBT} = {\bar{h} ({\overset{T}{true}}_{italicBT} - T_{italic∞}) + ϵ σ (T_{S}^{4} - T_{normal∞}^{4})}<...

…”

Section: Mathematical Modelingmentioning

confidence: 99%

“…Furthermore,

refers to diffusion flux of j th species, and

denotes supplementary volumetric heat source which is deserted in this case. 14 , 18 …”

Section: Mathematical Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Novel thermal treatment model to decontaminate airborne SARS Cov‐2 virus for residential and commercial buildings

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Modeling and analysis of PCM‐encapsulated solar thermal energy storage system for space heating

Soni,

Reddy,

Reddy

2023

Energy Storage

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In this study, a phase change material (PCM)‐encapsulated packed‐bed thermal energy storage (PB‐TES) system is intended for Day‐round space heating in the winter. Solar concentric collectors act for day‐time heating and TES charging, while the stored energy can be used at night and intermediate time for space heating. A region‐wise techno‐economic analysis of PCM candidates is made to compare the costs and sizes of solar collectors and PB‐TES. A spherical capsule filled with sodium nitrite (NaNO2) and sodium nitrate (NaNO3) is numerically investigated during the PCM charging at constant thermal input. After complete liquefication, the charging time for NaNO2 and NaNO3 capsules is 3280 and 4300 s, respectively, holding the maximum stored energy of 733.4 KJ/kg at 285°C and 687.27 kJ/kg at 310.12°C, respectively. In addition, the stored exergy is obtained 238.78 and 234.74 kJ/kg for NaNO2 and NaNO3, respectively; however, the average exergetic effectiveness for NaNO2 and NaNO3 are 0.54 and 0.46. Despite the lower energy storage capacity (kJ/kg) of NaNO3, the PB‐TES volume is less with NaNO3 than with NaNO2 due to higher density. However, the average cost ($/tonne) of NaNO3 PCM is 50% higher than NaNO2. Subsequently, the thermal efficiency of the proposed system is estimated at 27.68% and 26.94% during day and night‐time operations.

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Enhancement of organic solar cell efficiency by altering the zinc oxide photoanode nanostructure morphology

Samavati

Ismail

et al. 2021

J Nanostruct Chem

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The current paper examines the effects of zinc oxide nanostructure configurations, as photoanode formations of organic solar cells, on the performance of power conversion. To this end, some experiments were conducted during which a near band edge emission red shift of ~0.11 eV from nanoparticles to vertically-oriented nanorods was observed. This bandgap narrowing promotes transferring of photo-excited electrons towards the conduction band of photoanode. A ~48% decrease in the deep level emission intensity revealed a smaller nonradiative waves emission due to lower level of crystal disorder. By using vertically-oriented zinc oxide nanorods as photoanodes, the photovoltaic efficiency of the organic solar cell improved considerably. The nanorod-structured photoanodes showed a 0.22 V rise in the open-circuit voltage, from 0.76 V to 0.98 V, and a 2.08 times increment in the overall conversion performance, compared to the zinc oxide nanoparticle-structured photoanodes. This superior performance is attributed to a greater chance of charge recombination and light-trapping in the cells, more efficient light absorption, and high level of crystallinity that grants easier electron mobility for vertically-oriented zinc oxide nanorods. Moreover, a smaller electron transfer impedance (0.85 ) was achieved due to better electrocatalytic action for oxygen reduction for vertical nanorods compared to the other two zinc oxide configurations (1.62  and 5.06 ). This boosted the cell performance by increasing the short-circuit current density (JSC). The fabricated solar cell may contribute to sustainable and environmentally-friendly electricity generation process through reducing the consumption of nonrenewable energy sources.

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

Cited by 18 publications

References 60 publications

Novel thermal treatment model to decontaminate airborne SARS Cov‐2 virus for residential and commercial buildings

Novel thermal treatment model to decontaminate airborne SARS Cov‐2 virus for residential and commercial buildings

Modeling and analysis of PCM‐encapsulated solar thermal energy storage system for space heating

Enhancement of organic solar cell efficiency by altering the zinc oxide photoanode nanostructure morphology

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