Characteristic analysis of heat loss in multistage counter-flow paddy drying process

Li, Tao; Li, Changyou; Li, Bin; Li, Chengjie; Fang, Zhuangdong; Zeng, Zhiheng; Ou, Wenyan; Huang, Juanying

doi:10.1016/j.egyr.2020.08.006

Cited by 20 publications

(5 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Therefore, it is of great significance to design a recovery device to reuse the waste heat in the outlet air for the motivation of reducing the exhaust heat loss and energy-consumption costs. Li [56] found a similar result in his research on the characteristic analysis of heat loss in a multistage counterflow paddy dryer and pointed out that a corresponding waste heat recovery device should be designed for the problem of high-exhaust heat loss. similar result.…”

Section: Heat Loss Characteristicsmentioning

confidence: 62%

Energy and Exergy Analyses of a Combined Infrared Radiation-Counterflow Circulation (IRCC) Corn Dryer

Huang

et al. 2020

Applied Sciences

Self Cite

View full text Add to dashboard Cite

Energy consumption performance evaluation of an industrial grain dryer is an essential step to check its current status and to put forward suggestions for more effective operation. The present work proposed a combined IRCC dryer with drying capacity of 4.2 t/h that uses a novel drying technology. Moreover, the existing energy–exergy methodology was applied to evaluate the performance of the dryer on the basis of energy efficiency, heat loss characteristics, energy recovery, exergy flow and exegetic efficiency. The results demonstrated that the average drying rate of the present drying system was 1.1 gwater/gwet matter h. The energy efficiency of the whole drying system varied from 2.16% to 35.21% during the drying process. The overall recovered radiant energy and the average radiant exergy rate were 674,339.3 kJ and 3.54 kW, respectively. However, the average heat-loss rate of 3145.26 MJ/h indicated that measures should be put in place to improve its performance. Concerning the exergy aspect, the average exergy rate for dehydration was 462 kW and the exergy efficiency of the whole drying system ranged from 5.16% to 38.21%. Additionally, the exergy analysis of the components indicated that the combustion chamber should be primarily optimized among the whole drying system. The main conclusions of the present work may provide theoretical basis for the optimum design of the industrial drying process from the viewpoint of energetics.

show abstract

Section: Heat Loss Characteristicsmentioning

confidence: 62%

Energy and Exergy Analyses of a Combined Infrared Radiation-Counterflow Circulation (IRCC) Corn Dryer

Huang

et al. 2020

Applied Sciences

Self Cite

View full text Add to dashboard Cite

show abstract

“…For the Aceh region of Indonesia, it is known that the average maximum temperature from 2011-2015 is 34.7 °C [9], so that the utilization both 25 W and 50 W heaters is still relevant for this experiment. Several studies related to paddy drying have been carried out, prototypes and performance of hybrid solar heating and photovoltaic heater paddy dryers with a temperature monitoring system with an average drying temperature of 35.28°C [10], 32,4 °C, [12], 46°C [13]. Control system design for paddy drying with solar collectors and heat storage with an average drying temperature of 35.6°C [13].…”

Section: Drying Chamber Temperature Distribution Using Infrared Heatermentioning

confidence: 99%

Deep bed drying performance on paddy using hybrid infrared-solar dryer

Nasution

Agustina

Fauza

2022

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Hybrid infrared-solar dryer has a potential for drying fruits, vegetables, and grains such as paddy. This study aims to assess the performance of hybrid infrared-solar dryer on paddy in different of deep layer. Three different infrared heaters were used with a power of 25 W, 50 W, and 100 W. The hybrid infrared-solar dryer equipped with sensors placed in an open space so that sunlight can reach the drying chamber. The paddy samples were dried in different of deep layer (2 cm, 4 cm, 6 cm) until it reaches a moisture content of 14%. The input sensors in the drying chamber such as temperature, humidity, and moisture content were recorded using microcontroller and stored in Microsoft Excel® using the Parallax Data Acquisition tool. The algorithm was developed in order to control the heater from the input of temperature and humidity sensors by adjusting turn on/off relay. The study confirmed that the infrared heating power of 100 W is recommended for paddy drying if the ambient temperature is unfavourable (temperature less than 30°C). In general, the hybrid infrared-solar dryer with a power of 25 W-100 W has a potential to dry paddy quickly at a thickness of 2 cm-6 cm with a time range of 90-150 minutes.

show abstract

“…Temperatur pada pengeringan pascapanen mampu ditingkatkan secara signifikan dengan memanfaatkan heat exchanger. Suatu unit operasi dengan konsumsi energi paling penting dan tinggi pada pascapanen adalah pengeringan (Li et al, 2020). Penanganan pascapanen merupakan tahapan yang penting untuk menjaga kualitas bahan selama penyimpanan (Buchori et al, 2013).…”

Section: Pendahuluanunclassified

Karakteristik Termal-Produktivitas Heat Exchanger untuk Tungku Sekam Padi pada Pengeringan Cabai

Alit

Susana

2021

j.res.technol.ind.

View full text Add to dashboard Cite

Pengeringan dengan metode menjemur di bawah sinar matahari merupakan salah satu cara pengawetan bahan pangan yang mudah dan murah. Kelemahan metode ini diantaranya tergantung pada cuaca; rentan terpapar kotoran, debu, dan gangguan binatang. Pengeringan produk hasil pertanian dengan menjemur di bawah sinar matahari menimbulkan kondisi suhu sulit dikontrol karena sangat tergantung intensitas radiasi matahari, sehingga berdampak terhadap lama pengeringan. Oleh karenanya pengeringan buatan menjadi salah satu alternatif yang tepat untuk menggantikan pengeringan konvensional tersebut. Solusi dari kondisi ini yaitu menambahkan heat exchanger pada tungku pembakaran sekam padi. Model ini berfungsi sebagai alat pengering bahan pangan. Hasil pengujian menunjukkan rata-rata temperatur keluar heat exchanger mencapai 76,58 o C dengan rentang 44,64-117,29 o C. Temperatur ini merupakan hasil perpindahan panas pembakaran sekam padi dengan udara lingkungan yang mengalir ke dalam pipa-pipa heat exchanger. Temperatur keluar heat exchanger ini sebagai temperatur untuk mengeringkan bahan pangan di dalam ruang pengering dan dalam penelitian ini menggunakan sampel uji cabai merah. Rata-rata temperatur pengeringan mencapai 57,34 o C dengan rentang 31,69-92,57 o C. Karakteristik termal seperti ini mampu meningkatkan penurunan rata-rata kadar air bahan mencapai 10,47%. Kadar air awal bahan adalah 85% dengan lama waktu pengeringan 660 menit. Tingkat produktivitas meningkat sebesar 83,44% dibandingkan dengan menjemur di bawah sinar matahari.

show abstract

Characteristic analysis of heat loss in multistage counter-flow paddy drying process

Cited by 20 publications

References 51 publications

Energy and Exergy Analyses of a Combined Infrared Radiation-Counterflow Circulation (IRCC) Corn Dryer

Energy and Exergy Analyses of a Combined Infrared Radiation-Counterflow Circulation (IRCC) Corn Dryer

Deep bed drying performance on paddy using hybrid infrared-solar dryer

Karakteristik Termal-Produktivitas Heat Exchanger untuk Tungku Sekam Padi pada Pengeringan Cabai

Contact Info

Product

Resources

About