| Author | Maradee Phongpipatpong |
| Call Number | AIT Thesis no.AE-91-18 |
| Subject(s) | Peanuts--Drying
|
| Note | A thesis submitted in partial fulfillment of the requirements for the
degree of Master of Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | In this study, thin layer drying characteristics of Thai peanuts
(variety Tainan-9) were investigated. The drying conditions included dry bulb
temperature ranging from 36 to 55°C, relative humidity ranging from 37
to 81%, initial moisture content of peanut pods ranging from 22 to 104 %
dry basis, and air velocity of 0.2 m/s. Several equations were developed
based on regression analysis to represent the drying characteristics of
peanuts adequately. Comparison of various thin layer equations revealed
that two- term exponential equation provided a good fit for peanuts with
initial moisture content more than 55 % dry basis whereas the modified
exponential equation gave better fit for peanuts with moisture content
below 55 % dry basis.
A thin layer drying equation was also developed on the basis of
transient conditions of the input air in the form of a simple exponential
model. The moisture contents estimated from this equation were higher than
t he experimental values. These differences were perhaps due to the error in
the measurement of wet-bulb temperatures in between the thin layers, and
could be reduced using a constant factor determined by the comparison of
experimental and estimated moisture contents. The effect of layer thickness
on the thin layer drying equation development was also investigated. The
results showed that a layer thickness up to 7. 5 cm did not affect the
values of the regression coefficients in thin layer drying equation. |
| Year | 1991 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Jindal, Vinod Kumar; |
| Examination Committee(s) | Athapol Noomhorm;Gupta, C.P.; |
| Scholarship Donor(s) | STARR Foundation; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1991 |