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102623

UTILIZATION OF SAS LANGUAGE FOR MODELING THE ROCK BED PERFORMANCE

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Last updated: 26 Dec 2024

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Biosystems Engineering

Abstract

Heated air by solar collector has high variation in temperature because it is depend on time.  Therefore, a rock-bed was used to regulate the air temperature and to damp out the large fluctuation of air temperature, although it causes a change in the phase and the amplitude temperature of the inlet air. The rock-bed could be used then to store day-heat for night use.             The purpose of this paper was to mathematically model the rock-bed performance using SAS language. This modeling utilizes; (1) rock-bed characteristics, (2) Fourier series, and (3) statistical procedures for predicting the outlet air temperature.  A computer program was developed to achieve this purpose.  An air flow of 4.66 m3/min was used to test the computer model and air temperatures at 0, 0.375, and 0.70 m of the rock bed height were recorded by time for 24 h. It was found that Fourier series was more efficient for predicting the air temperature at any vertical location of the rock-bed. The correlation coefficient using the rock-bed characteristics and Fourier series was 0.905 for predicting the outlet air temperature. The determination coefficients were found to be above 0.98 between observed and predicted air temperatures at any vertical location of the rock-bed.

DOI

10.21608/mjae.2011.102623

Authors

First Name

Ezzat A.

Last Name

Abed EL-Ghaffar

MiddleName

-

Affiliation

Prof. Agric. and Biosystems Eng. Dept., Fac. of Agric. (Chatby), Alexandria University, Egypt.

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City

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Orcid

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First Name

Khiery M.

Last Name

Ismail

MiddleName

-

Affiliation

Prof. Agric. and Biosystems Eng. Dept., Fac. of Agric. (Chatby), Alexandria University, Egypt.

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City

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Orcid

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First Name

M. A.

Last Name

Rashwan

MiddleName

-

Affiliation

Assist. Prof. Agric. and Biosystems Eng. Dept., Fac. of Agric. (Chatby), Alexandria University, Egypt.

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City

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Orcid

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Volume

28

Article Issue

4

Related Issue

15523

Issue Date

2011-10-01

Receive Date

2020-07-12

Publish Date

2011-10-01

Page Start

1,073

Page End

1,093

Print ISSN

1687-384X

Online ISSN

2636-3062

Article File

MJAE_Volume 28_Issue 4_Pages 1073-1093.pdf

PDF . 610.5kB

Link

https://mjae.journals.ekb.eg/article_102623.html

Detail API

https://mjae.journals.ekb.eg/service?article_code=102623

Order

19

Type

Original Article

Type Code

1,326

Publication Type

Journal

Publication Title

Misr Journal of Agricultural Engineering

Publication Link

https://mjae.journals.ekb.eg/

MainTitle

UTILIZATION OF SAS LANGUAGE FOR MODELING THE ROCK BED PERFORMANCE

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Article

Created At

23 Jan 2023