The operational impact of integrating a Solar Evacuated-Tube Air Heater with a baffle and Perforated Twisted Tape (SETAHBPTT) on one side of the baffle in every evacuated tube (ET) for a pitch length of 57 mm, Hole (3 holes) Diameter of 2 mm on the twisted tape, and various air flow rates were studied. The novel airflow pattern of splitting the airflow within the ET and perforated twisted tape (PTT) inserts was placed to increase the outlet temperature at higher air flow rates and compensate for the pressure drop at the same time, and it was experimentally investigated to scale the impact of PTT insertion on the performance of SETAHBPTT. An analytical model is developed for the flow pattern in SETAHBPTT, and its results were validated with the experimental results, both results were in good agreement with minimum deviation. The temperature rise of the outlet is highest at 318.47 K for the least mass flow rate of 100 kg/h. The peak thermal efficiency is 59.7% for the mass flow rate of 500 kg/h. An optimum mass flow rate of air for the maximum effective thermal efficiency is 51.21% at 300 kg/h. For an airflow rate of 100 kg/h, the maximum exergy efficiency was 2.37%, and the exergy efficiency decreased with an increasing airflow rate. The Levelized Cost of Heating, which is the cost of producing heated air per kilo Watt hour, was 0.023 INR for the proposed system.
AbdelmagiedM. Thermo-fluid characteristics and exergy analysis of a twisted tube helical coil. 2024; Abdelmagied M. Thermo-fluid characteristics and exergy analysis of a twisted tube helical coil. Sci Rep2024; 14: 27873.
2.
AbedAMChauhanBSAyedH, et al.Hydrothermal performance analyses of an isothermal tube with punched twisted tape turbulator (PTT). Case Stud Therm Eng2024; 57: 104308.
3.
AggarwalSKumarRKumarS, et al.Impact of fin material properties and the inclination angle on the thermal efficiency of evacuated tube solar water heater: an experimental study. J King Saud Univ - Sci2024; 36: 103186.
4.
AggarwalSKumarRLeeD, et al.A comprehensive review of techniques for increasing the efficiency of evacuated tube solar collectors. Heliyon2023; 9.
5.
AbrofarakhMMoghadamH. Investigation of thermal performance and entropy generation rate of evacuated tube collector solar air heater with inserted baffles and metal foam: a CFD approach. Renew Energy2024; 223: 120022.
6.
AliA. Performance study on a new solar air heater for space heating : a numerical and experimental study. AIP Advances2024; 125314: 1–16.
7.
BoussouarGRostaneBAlianeK, et al.2024. Study of the thermal performance of solar air collectors with and without perforated baffles. Energies 2024; 17: 3812.
8.
CanOFCelikNOzgenF, et al.Experimental and numerical analysis of the solar collector with stainless steel scourers added to the absorber surface. Appl Sci2024; 14: 2629.
9.
Chávez-BermúdezIAOrtega-AvilaNVenegas-ReyesE. A thermal model for a CPC-Type double-pass solar air heater. AIP Conf Proc2022; 2445: 120007.
10.
ChithraVPJayakumarVBakthavatchalamB, et al.Thermal performance enhancement of laminar flow using compound twisted square duct and variable pitch twisted tape inserts. Case Stud Therm Eng2024; 64: 105462.
11.
ElbrashyAElshennawyARashadM, et al.Assessment of thermal behavior for storage material filled in annulus coaxial aluminum pipes and inserted in evacuated tube collector: an experimental and mathematical investigation. J Energy Storage2025; 105: 114674.
12.
El-FakharanyMKAbo-SamraAEAAbdelmaqsoudAM, et al.Enhanced performance assessment of an integrated evacuated tube and flat plate collector solar air heater with thermal storage material. Appl Therm Eng2024; 243: 122653.
13.
GhildyalASinghVBhandariP, et al.A comparative numerical evaluation of solar air heater performance having W-contoured, taper-contoured and reverse taper-contoured turbulators. 2024.
14.
IbrahimSHNajiZH. Augmentation heat transfer in a circular tube using twisted-tape inserts: a review. J Eng Sustain Dev2023; 27: 511–526.
15.
KhimsuriyaYDPatelDKPatelV, et al.Heat transfer enhancement in a solar air heater utilizing novel rotating spiral baffles. J Renew Sustain Energy2024; 16.
16.
KumbharDGSutarKBKumarA, et al.Experimental studies on heat transfer performance of a heat exchanger with drilled twisted tape inserts. Eng Res Express2024; 6: 045568.
17.
KurhadeASSiraskarGDJawalkarSS, et al.The impact of circular holes in twisted tape inserts on forced convection heat transfer. J Mines, Met Fuels2024; 72: 1005–1012.
18.
MohammedAAShakirAKChannapattanaSV. Numerical investigation of triangular Y-shaped cut twisted stripe insertion on improving the performance of heat exchangers. J Adv Res Fluid Mech Therm Sci2024; 2: 220–234.
19.
MunusamyABarikDChandranSSR, et al.Experimental analysis of the effect of copper dimple tube with aluminum coating on the performance of parabolic solar water heater using helically twisted tape. Adv Mech Eng2024; 16: 1–12.
20.
MutarWMAlaiwiY. Experimental investigation of thermal performance of single pass solar collector using high porosity metal foams. Case Stud Therm Eng2023; 45: 102879.
21.
Prabhat Bhuddha DevSGanapathiramanSManickamP. Experimental studies on evacuated tube collector with in-built energy storage - waste car engine oil as sensible heat storage medium. J Energy Storage2024; 84: 110929.
22.
SachdevaAChandrashekaraMYadavA. Development and thermodynamic analysis of a novel heat pipe vacuum tube solar collector with sensible heat storage. Energy Sources, Part A Recover Util Environ Eff2023; 45: 1511–1532.
23.
ShafieianAKhiadaniMNosratiA. Thermal performance of an evacuated tube heat pipe solar water heating system in cold season. Appl Therm Eng2019; 149: 644–657.
24.
Siuta-OlchaACholewaTDopieralska-HoworuszkoK. Experimental studies of thermal performance of an evacuated tube heat pipe solar collector in Polish climatic conditions. Environ Sci Pollut Res2021; 28: 14319–14328.
25.
Hassan VenkataramaiahHNagarajaSRaikarP, et al.Study of thermo-hydraulic performance in a circular tube with elliptical protruded twisted tape inserts. Numer Heat Transf Part A Appl2024; 0: 1–15.
26.
Vishwakarma-et-al.pdf In, VishwakarmaDKBhattacharyyaS, et al.Transition Flow Heat Transfer and Pressure Drop in a Uniformly Heated Inclined Solar Air Heater Fitted with Wavy Tapes. InInternational Conference on Computational Heat and Mass Transfer 2023 Sep 4 (pp. 703–712). Cham: Springer International Publishing.
27.
UyanikMDağdevirTOzceyhanV. Thermo-hydraulic performance investigation of a heat exchanger tube inserted with twisted tapes modified with various twist ratio and alternate axis. Eur Mech Sci2022; 6: 189–195.
28.
Veera KumarAArjunanTVSeenivasanD, et al.Thermal performance of an evacuated tube solar collector with inserted baffles for air heating applications. Sol Energy2021; 215: 131–143.
29.
VenkatramananRArjunanTVSeenivasanD, et al.Parametric study of evacuated tube collector solar air heater with inserted baffles on thermal network for low-temperature applications. J Clean Prod2022; 367: 132941.
30.
GunesSKarakayaE. Thermal characteristics in a tube with loose-fit perforated twisted Tapes. Heat Transf Eng2015; 36: 1504–1517.
31.
VenkatramananRArjunanTVSeenivasanD, et al.Energetic and enviro-economic performance of medium scale evacuated tube solar air heating system for industrial applications. Proc Inst Mech Eng Part A J Power Energy2024; 239: 388–389.
32.
MatheswaranMMArjunanTVSomasundaramD. Analytical investigation of solar air heater with jet impingement using energy and exergy analysis. Sol Energy2018; 161: 25–37.
33.
AbuşkaMKayapunarA. Experimental and numerical investigation of thermal performance in solar air heater with conical surface. Heat Mass Transf2021; 57: 1791–1806.
34.
AboulmagdAPadovanACésaro Oliveski DDCR. a New Model for the Analysis of Performance in Evacuated Tube Solar Collectors. 3rd Int High Perform Build Conf Purdue. 2014;(July):1–10.
35.
MatheswaranMMArjunanTVSomasundaramD. Analytical investigation of exergetic performance on jet impingement solar air heater with multiple arc protrusion obstacles. J Therm Anal Calorim2019; 137: 253–266.
36.
Veera KumarAArjunanTVSeenivasanD, et al.Influence of twisted tape inserts on energy and exergy performance of an evacuated tube-based solar air collector. Sol Energy2021; 225: 892–904.
37.
VijayanSArjunanTVKumarA. Exergo-environmental analysis of an indirect forced convection solar dryer for drying bitter gourd slices. Renew Energy2020; 146: 2210–2223.
38.
AtizAKarakilcikM. Experimental room heating applications relative to increasingly evacuated vacuum tube solar collectors. Heat Mass Transf2023; 59: 1059–1071.
39.
Abu HamedTAlkharabshehS. Design and performance analysis of a new evacuated tube solar air heaters equipped with fins and coils. Int J Sustain Energy2020; 39: 997–1008.
40.
Veera KumarAArjunanTSeenivasanD, et al.Techno-Economic evaluation of an evacuated tube solar air collector with inserted baffles. Proc Inst Mech Eng Part E J Process Mech Eng2021; 235: 1027–1038.
Supplementary Material
Please find the following supplemental material available below.
For Open Access articles published under a Creative Commons License, all supplemental material carries the same license as the article it is associated with.
For non-Open Access articles published, all supplemental material carries a non-exclusive license, and permission requests for re-use of supplemental material or any part of supplemental material shall be sent directly to the copyright owner as specified in the copyright notice associated with the article.
