Performance of indirect through pass natural convective solar crop dryer with phase change thermal energy storage

被引:177
作者
Jain, Dilip [1 ]
Tewari, Pratibha [1 ]
机构
[1] ICAR Cent Arid Zone Res Inst, Div Agr Engn Arid Prod Syst, Jodhpur 342003, Rajasthan, India
关键词
Solar dryer; Phase change thermal energy storage; Thermal performance; Economic analysis; AIR HEATER; DRYING SYSTEMS;
D O I
10.1016/j.renene.2015.02.012
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
A state-of-the-art solar crop dryer was developed with thermal energy storage to maintain continuity of drying of herbs for their colour and flavour vulnerability. The dryer consists of flat plate solar collector, packed bed phase change energy storage, drying plenum with crop trays and natural ventilation system. Dryer is designed with a maximum collector area of 1.5 m(2), six crop trays with an effective area of 0.50 x 0.75 m(2), can hold 12 kg of fresh leafy herbs. The dryer is attached with a packed bed thermal energy storage having capacity of 50 kg phase change material (PCM). The drying system works in such a manner that phase change material stores the thermal energy during sun shine hours and releases the latent and sensible heat after sunset, thus dryer is effectively operative for next 5-6 h. The temperature in drying chamber was observed 6 degrees C higher than the ambient temperature after sunshine hours till the mid night during the month of June at Jodhpur. Economic performance of the dryer was analysed with return on capital and simple payback period as 0.65 and 1.57 year respectively on optimum cost of raw material and product sale price. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码:244 / 250
页数:7
相关论文
共 19 条
[1]   Parametric study of a solar air heater with and without thermal storage for solar drying applications [J].
Aboul-Enein, S ;
El-Sebaii, AA ;
Ramadan, MRI ;
El-Gohary, HG .
RENEWABLE ENERGY, 2000, 21 (3-4) :505-522
[2]  
BANSAL NK, 1987, ADV DRYING SOLAR CRO, V4
[3]   THERMAL-ENERGY STORAGE USING SODIUM-SULFATE DECAHYDRATE AND WATER [J].
BISWAS, DR .
SOLAR ENERGY, 1977, 19 (01) :99-100
[4]   Review of solar-energy drying systems - II: an overview of solar drying technology [J].
Ekechukwu, OV ;
Norton, B .
ENERGY CONVERSION AND MANAGEMENT, 1999, 40 (06) :615-655
[5]   A review on phase change energy storage: materials and applications [J].
Farid, MM ;
Khudhair, AM ;
Razack, SAK ;
Al-Hallaj, S .
ENERGY CONVERSION AND MANAGEMENT, 2004, 45 (9-10) :1597-1615
[6]  
Fudholi A., 2011, P 7 IASMEWSEAS INT C, V11, P89
[7]   Modeling the performance of greenhouse with packed bed thermal storage on crop drying application [J].
Jain, D .
JOURNAL OF FOOD ENGINEERING, 2005, 71 (02) :170-178
[8]   Performance evaluation of an inclined multi-pass solar air heater with in-built thermal storage on deep-bed drying application [J].
Jain, D ;
Jain, RK .
JOURNAL OF FOOD ENGINEERING, 2004, 65 (04) :497-509
[9]   Modeling the performance of the reversed absorber with packed bed thermal storage natural convection solar crop dryer [J].
Jain, Dilip .
JOURNAL OF FOOD ENGINEERING, 2007, 78 (02) :637-647
[10]   Modeling the system performance of multi-tray crop drying using an inclined multi-pass solar air heater with in-built thermal storage [J].
Jain, DL .
JOURNAL OF FOOD ENGINEERING, 2005, 71 (01) :44-54