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JSIR Vol.71 [2012] >
JSIR Vol.71(02) [February 2012] >
| Title: | Design and construction of an oven for drying palm bunch using glycerine as fuel together with using closed-loop oscillating heat-pipe with check valves (CLOHP/CV) heat exchanger for waste heat recovery |
| Authors: | Sangiamsuk, S.
Rittidech, S.
Pattiya, A.
Pipatpaiboon, N. |
| Keywords: | Closed-loop Oscillating heat-pipe
Glycerin
Palm Bunch Oven |
| Issue Date: | Feb-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | This research addresses
design and construction of an oven (2 m x 3 m x 2 m) for effectively drying
palm bunch using glycerin as a fuel and a closed-loop oscillating heat-pipe
with check valves (CLOHP/CV) as a heat exchanger for waste heat recovery. In
each experiment, palm bunches (500 kg) were baked in oven with and without
CLOHP/CV heat exchanger. CLOHP/CV (0.2 m x 0.8 m x 0.5 m) is made of copper
tubes (inner diam, 2.03 mm). Working fluids were distilled water, ethanol and
R134a. Waste heat from oven was recovered by heat exchanger and was beneficial
for pre-heating the air in combustion process. Pre-heating was useful in
burning glycerine, and distribution of heat inside oven with CLOHP/CV was
better than without CLOHP/CV. Consequently, palm bunches received uniform heat
that restrained enzyme thus slowing dissolution reactions that would otherwise
produce free fatty acids and cause loss of palm oil. Use of a CLOHP/CV also
reduced moisture content of palm bunches to 1.2 wt% on dry basis. When using
oven with CLOHP/CV as a heat exchanger with R134a as working fluid, the highest
thermal efficiency of drying palm bunch was 42.4%, highest effectiveness of
CLOHP/CV was 43.0% and highest efficiency of glycerin stove was 45.0%. |
| Page(s): | 138-143 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1084 (Online); 0022-4456 (Print) |
| Source: | JSIR Vol.71(02) [February 2012]
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