Solar thermal energy technology

Experimental study on the design and performance of an indirect solar dryer for agricultural products

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

This chapter investigated the use of solar energy for drying. The objective of thestudy was to study a simple batch dryer for agriculture products in order to improve thedesign and to determine the most effective variables influencing its performance. For thispurpose, an indirect conventional solar dryer unit consisting of a solar air heater (i.e.,inclined solar collector with corrugations) and a drying chamber (i.e., basically a batchdryer) was designed and built at the College of Engineering, Sultan Qaboos University(SQU) in Muscat (Oman). This unit can be used for drying various agricultural productslike fruits and vegetables. In this chapter, the solar dryer unit was used to dry radish cropsas the test samples. The dryer unit was investigated experimentally and its performancewas evaluated under the climatic conditions of Oman (21° 00 N, 57° 00 E). To this effect,a series of experiments were performed on the developed solar dryer during summerconditions in Oman (between May 4 and June 8, 2008). The performance of the solardryer was computed and expressed in terms of the moisture evaporation (crop massduring drying). Several influencing design parameters, involved in the dehydrationprocess, that were expected to affect on this performance and on the drying time weretested and discussed. The design parameters studied were the number of glazing cover,the type of the absorber of the solar collector, the loading capacity, and the drying airflowrate. In terms of the number of glazing cover sheet, experiments were performed with asingle glazing and a double glazing. With regard to the type of the absorber plate, verticaland horizontal corrugated absorber plates were used. The thermal performance of thesolar dryer was also evaluated under no absorber plate conditions. In addition, thethermal performance of the solar dryer was evaluated under various load conditions andthe unit was also tested under various drying air velocity. The temperature and relative humidity data during the solar drying were also recorded for each experiment. Thecomparison revealed that the performance of the solar dryer was improved remarkablywith the use of the vertical corrugated duct collector and the drying time wasconsequently reduced. The results also affirmed that the performance increased withreducing the loading capacity. The other parameters were found to have a negligibleeffect on the performance.

Original languageEnglish
Title of host publicationAir Conditioning Systems: Performance, Environment and Energy Factors
PublisherNova Science Publishers, Inc.
Pages243-266
Number of pages24
ISBN (Print)9781607415558
Publication statusPublished - Jan 2011

Fingerprint

energy technology
drying apparatus
thermal energy
drying
products
Oman
absorbers
solar collectors
vegetables
agriculture
fruits
air
crops
solar energy
ducts
heaters
moisture
accumulators
humidity
chambers

Keywords

  • Corrugated absorber
  • Design parameters
  • Drying time
  • Indirect solar dryer
  • Moisture content
  • Oman.

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Abdul-Wahab, S. A. (2011). Solar thermal energy technology: Experimental study on the design and performance of an indirect solar dryer for agricultural products. In Air Conditioning Systems: Performance, Environment and Energy Factors (pp. 243-266). Nova Science Publishers, Inc..

Solar thermal energy technology : Experimental study on the design and performance of an indirect solar dryer for agricultural products. / Abdul-Wahab, Sabah A.

Air Conditioning Systems: Performance, Environment and Energy Factors. Nova Science Publishers, Inc., 2011. p. 243-266.

Research output: Chapter in Book/Report/Conference proceedingChapter

Abdul-Wahab, SA 2011, Solar thermal energy technology: Experimental study on the design and performance of an indirect solar dryer for agricultural products. in Air Conditioning Systems: Performance, Environment and Energy Factors. Nova Science Publishers, Inc., pp. 243-266.
Abdul-Wahab SA. Solar thermal energy technology: Experimental study on the design and performance of an indirect solar dryer for agricultural products. In Air Conditioning Systems: Performance, Environment and Energy Factors. Nova Science Publishers, Inc. 2011. p. 243-266
Abdul-Wahab, Sabah A. / Solar thermal energy technology : Experimental study on the design and performance of an indirect solar dryer for agricultural products. Air Conditioning Systems: Performance, Environment and Energy Factors. Nova Science Publishers, Inc., 2011. pp. 243-266
@inbook{5e3551548d3d44ac8ea3d38ef517a223,
title = "Solar thermal energy technology: Experimental study on the design and performance of an indirect solar dryer for agricultural products",
abstract = "This chapter investigated the use of solar energy for drying. The objective of thestudy was to study a simple batch dryer for agriculture products in order to improve thedesign and to determine the most effective variables influencing its performance. For thispurpose, an indirect conventional solar dryer unit consisting of a solar air heater (i.e.,inclined solar collector with corrugations) and a drying chamber (i.e., basically a batchdryer) was designed and built at the College of Engineering, Sultan Qaboos University(SQU) in Muscat (Oman). This unit can be used for drying various agricultural productslike fruits and vegetables. In this chapter, the solar dryer unit was used to dry radish cropsas the test samples. The dryer unit was investigated experimentally and its performancewas evaluated under the climatic conditions of Oman (21° 00 N, 57° 00 E). To this effect,a series of experiments were performed on the developed solar dryer during summerconditions in Oman (between May 4 and June 8, 2008). The performance of the solardryer was computed and expressed in terms of the moisture evaporation (crop massduring drying). Several influencing design parameters, involved in the dehydrationprocess, that were expected to affect on this performance and on the drying time weretested and discussed. The design parameters studied were the number of glazing cover,the type of the absorber of the solar collector, the loading capacity, and the drying airflowrate. In terms of the number of glazing cover sheet, experiments were performed with asingle glazing and a double glazing. With regard to the type of the absorber plate, verticaland horizontal corrugated absorber plates were used. The thermal performance of thesolar dryer was also evaluated under no absorber plate conditions. In addition, thethermal performance of the solar dryer was evaluated under various load conditions andthe unit was also tested under various drying air velocity. The temperature and relative humidity data during the solar drying were also recorded for each experiment. Thecomparison revealed that the performance of the solar dryer was improved remarkablywith the use of the vertical corrugated duct collector and the drying time wasconsequently reduced. The results also affirmed that the performance increased withreducing the loading capacity. The other parameters were found to have a negligibleeffect on the performance.",
keywords = "Corrugated absorber, Design parameters, Drying time, Indirect solar dryer, Moisture content, Oman.",
author = "Abdul-Wahab, {Sabah A.}",
year = "2011",
month = "1",
language = "English",
isbn = "9781607415558",
pages = "243--266",
booktitle = "Air Conditioning Systems: Performance, Environment and Energy Factors",
publisher = "Nova Science Publishers, Inc.",

}

TY - CHAP

T1 - Solar thermal energy technology

T2 - Experimental study on the design and performance of an indirect solar dryer for agricultural products

AU - Abdul-Wahab, Sabah A.

PY - 2011/1

Y1 - 2011/1

N2 - This chapter investigated the use of solar energy for drying. The objective of thestudy was to study a simple batch dryer for agriculture products in order to improve thedesign and to determine the most effective variables influencing its performance. For thispurpose, an indirect conventional solar dryer unit consisting of a solar air heater (i.e.,inclined solar collector with corrugations) and a drying chamber (i.e., basically a batchdryer) was designed and built at the College of Engineering, Sultan Qaboos University(SQU) in Muscat (Oman). This unit can be used for drying various agricultural productslike fruits and vegetables. In this chapter, the solar dryer unit was used to dry radish cropsas the test samples. The dryer unit was investigated experimentally and its performancewas evaluated under the climatic conditions of Oman (21° 00 N, 57° 00 E). To this effect,a series of experiments were performed on the developed solar dryer during summerconditions in Oman (between May 4 and June 8, 2008). The performance of the solardryer was computed and expressed in terms of the moisture evaporation (crop massduring drying). Several influencing design parameters, involved in the dehydrationprocess, that were expected to affect on this performance and on the drying time weretested and discussed. The design parameters studied were the number of glazing cover,the type of the absorber of the solar collector, the loading capacity, and the drying airflowrate. In terms of the number of glazing cover sheet, experiments were performed with asingle glazing and a double glazing. With regard to the type of the absorber plate, verticaland horizontal corrugated absorber plates were used. The thermal performance of thesolar dryer was also evaluated under no absorber plate conditions. In addition, thethermal performance of the solar dryer was evaluated under various load conditions andthe unit was also tested under various drying air velocity. The temperature and relative humidity data during the solar drying were also recorded for each experiment. Thecomparison revealed that the performance of the solar dryer was improved remarkablywith the use of the vertical corrugated duct collector and the drying time wasconsequently reduced. The results also affirmed that the performance increased withreducing the loading capacity. The other parameters were found to have a negligibleeffect on the performance.

AB - This chapter investigated the use of solar energy for drying. The objective of thestudy was to study a simple batch dryer for agriculture products in order to improve thedesign and to determine the most effective variables influencing its performance. For thispurpose, an indirect conventional solar dryer unit consisting of a solar air heater (i.e.,inclined solar collector with corrugations) and a drying chamber (i.e., basically a batchdryer) was designed and built at the College of Engineering, Sultan Qaboos University(SQU) in Muscat (Oman). This unit can be used for drying various agricultural productslike fruits and vegetables. In this chapter, the solar dryer unit was used to dry radish cropsas the test samples. The dryer unit was investigated experimentally and its performancewas evaluated under the climatic conditions of Oman (21° 00 N, 57° 00 E). To this effect,a series of experiments were performed on the developed solar dryer during summerconditions in Oman (between May 4 and June 8, 2008). The performance of the solardryer was computed and expressed in terms of the moisture evaporation (crop massduring drying). Several influencing design parameters, involved in the dehydrationprocess, that were expected to affect on this performance and on the drying time weretested and discussed. The design parameters studied were the number of glazing cover,the type of the absorber of the solar collector, the loading capacity, and the drying airflowrate. In terms of the number of glazing cover sheet, experiments were performed with asingle glazing and a double glazing. With regard to the type of the absorber plate, verticaland horizontal corrugated absorber plates were used. The thermal performance of thesolar dryer was also evaluated under no absorber plate conditions. In addition, thethermal performance of the solar dryer was evaluated under various load conditions andthe unit was also tested under various drying air velocity. The temperature and relative humidity data during the solar drying were also recorded for each experiment. Thecomparison revealed that the performance of the solar dryer was improved remarkablywith the use of the vertical corrugated duct collector and the drying time wasconsequently reduced. The results also affirmed that the performance increased withreducing the loading capacity. The other parameters were found to have a negligibleeffect on the performance.

KW - Corrugated absorber

KW - Design parameters

KW - Drying time

KW - Indirect solar dryer

KW - Moisture content

KW - Oman.

UR - http://www.scopus.com/inward/record.url?scp=84892072003&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84892072003&partnerID=8YFLogxK

M3 - Chapter

SN - 9781607415558

SP - 243

EP - 266

BT - Air Conditioning Systems: Performance, Environment and Energy Factors

PB - Nova Science Publishers, Inc.

ER -