Abstract:
Nowadays, the agriculturists has been led a biogas fuel that produced from waste water in the pig
farm, to produced electricity. The modified biogas engine has produced low efficiency biogas.
Cause to the pig farm pays for expensive cost to produce electricity in section of air conditioning
section, to solve problem, so the agriculturists used the evaporative cooling system instead. And the
other problem was large amount of moisture in the air in the pig farm which takes effects of growth
and hygiene to the pigs in farm, so this paper is aimed to research the problem as described above.
First, study for increases efficiency electricity production used the biogas engine and the modified
biogas engine, and compare advantages and disadvantages both of engines, and emphasized study of
efficiency and the worthiness of the economics. Second part, study how to reduce air moisture by
used Plastic Mesh , from this the wetted media of evaporative cooling system, and vary a parameters
such as wire mesh sizes, spaces between wire mesh, air velocity, and amount of wire mesh layers.
Finalize, create an equations of parameter that relations with reducing air moisture by use of Plastic
Mesh.
Results of this research can found that use of the biogas engine to produce electricity was much
more than the modified biogas engine for double times of production rate, The biogas engine used
in SPM pig farm has economy analysis as following, ratio of profits per cost is 4.98, returning asset
rate will be 77.59 % and payback period is 1.39 year respectively, to reduced air moisture flow
through evaporative cooling system with Plastic Mesh, it is found that can reduced air humidity 2.87
– 4.94 %RH approximately, but is not reduced enough for keep the properly environmental suitable
for pigs, and the installation of Plastic Mesh might be causes of error pressure drop for air
ventilating system. With this problem, the pigs could feel uneasily because of high temperature in
farm. So, the pig farm needs to run the air ventilating system more than usual, and consume energy
with this way.