Abstract
Vacuum wood drying is a fast and proven method, in which wood is subjected to dry at lower temperature. However, continuous transfer of the heat is not possible through convection under lower pressure. Moreover, energy storage and its transfer to wood layers through conduction can make a system more efficient and eco-friendly. Aluminium crosser/stickers were used to fill a phase change material (PCM) and flow hot water by keeping them in tight contact and placing side by side. Charging and discharging of the PCM were carried out at various water temperatures, and melting duration were recorded. In another experiment, simultaneous charging–discharging along with heating wood layers was conducted to ascertain effectiveness of the system. Molten PCM in aluminium stickers/crossers was stacked along with 50-mm-thick Melia dubia wood in a vessel, and vacuum drying was carried out. The results indicate that to melt PCM, higher water temperature (20 °C above melting point) resulted in quickest melting as compared with lower temperatures. Heat storage in PCM resulted in maintaining sufficiently higher wood core temperature. Under, a lower pressure system, using PCM-filled aluminium stickers long with wood layers resulted in an efficient drying. The study demonstrates feasibility of integrating thermal energy storage with timber vacuum dryers heated by solar water heaters.
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References
Bansal NK, Buddhi D (1992) Performance equations of a collector cum storage system using phase change materials. Sol Energy 48(3):185–194
Chen CR, Sharma A (2006) Numerical investigation of melt fraction of PCMs in a latent heat storage system. Journal of Engineering and Applied Sciences 1(4):437–444
Domanski R, Wisniewski T, Rebow M (1997) Experimental study of natural convection in the melting of PCM in horizontal cylindrical annuli, QIRT96-Eurtherm series 50-Edizioni ETS, Pisa
Dutil Y, Rousse DR, Salah NB, Lassue S, Zalewski L (2011) A review on phase-change materials: Mathematical modeling and simulations. Renew Sustain Energy Rev 15(1):112–130
Enibe SO (2003) Thermal analysis of a natural circulation solar air heater with phase change material energy storage. Renew Energy 28:2269–2299
Hamad FA, Egelle E, Gooneratne S, Russell P (2021) The effect of aspect ratio on PCM melting behaviour in rectangular enclosure. Int J Sustain Eng 14(5):1251–1268
IS 1141 (1993) Seasoning of timber- Code of practice. Bureau of Indian Standards. Bureau of Indian Standard, 1993
Jung HS, Lee JH, Lee NH (2000) Vacuum-press drying of thick softwood lumbers. Drying Tech 18(8):1921–1933
Kowata H, Sase S, Ishii M and Moriyama H (2002) Cold water thermal storage with phase change materials using nocturnal radiative cooling for vegetable cooling. In: Proceedings: World Renewable Energy Congress WII, Cologne, Germany
Kumar S, Kishankumar VS (2017) Charging-discharging characteristics of macro-encapsulated phase change materials in an active thermal energy storage system for a solar drying kiln. Therm Sci 21(6 Part A):2525–2532
Mahdi MS, Mahood HB, Campbell AN, Khadom AA (2021) Natural convection improvement of PCM melting in partition latent heat energy storage: numerical study with experimental validation. Int Commun Heat Mass Transfer 126:105463
Mehmet E (2000) Thermal performance of a solar-aided latent heat store used for space heating by heat pump. Sol Energy 69(1):15–25
Nagano K, Moochida T, Takeda S, Domanski D, Rebow M (2003) Thermal performance of maganese (ii) nitrate hex-ahydrate as a phase change material for cooling systems. Appl Therm Eng 23(2):229–243
Oltean L, Teischinger A, Hansmann C (2007) Influence of temperature on cracking and mechanical properties of wood during wood drying–a review. BioResources 2(4):789–881
Pal D, Joshi Y (1996) Application of phase change materials for passive thermal control of plastic quad flat packages: a computational study. Numer Heat Transfer, Part A 30:19–34
Shailendra K, Kumar VSK (2017) Effect of container orientation on melt fraction and use of PCM in enhancing night temperature in a prototype solar kiln. Indian Forester 143(1):43–47
Sharma SD, Iwata T, Kitano H, Sagara K (2004) Thermal performance of a solar cooker based on evacuated tube solar collector with a PCM storage unit. Sol Energy 78(3):416–426
Telkes M, Raymond E (1949) Storing solar heat in chemicals. Heat Vent 46(11):80–86
Wang R, Ren M, Gao X, Qin L (2018) Preparation and properties of fatty acids based thermal energy storage aggregate concrete. Constr Build Mater 165:1–10
Zhang J (1999) Energy saving technology of refrigeration devices. Mechanical Industry Press, Beijing
Acknowledgements
The author is thankful to Indian Council of Forestry Research and Education (ICFRE), Dehradun, for funding support.
Funding
Shailendra Kumar received funding for this study from the Indian Council of Forestry Research and Education, FRI-640/FPD (WS)-105.
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Shailendra, K. Exploratory studies on using thermal energy storage for vacuum wood drying. J Indian Acad Wood Sci (2024). https://doi.org/10.1007/s13196-024-00338-1
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DOI: https://doi.org/10.1007/s13196-024-00338-1