Agriculture Reference
In-Depth Information
• Mechanized irrigation (o4) is performed by irrigation machinery.
• Other operations (o5) are performed by rest agricultural machinery, the
workload statistics of which are not available.
7.2.3 MAIN MODULE
Two kinds of the energy carriers, diesel and electricity, are considered in
SECA. The energy required to perform the selected farming operation is
estimated using the equation below:
(1)
wherein the subscript o indicates the farm operations mentioned in the
Operation Module (o = o1, o2,…, o5); the subscript y indicates the year (y
= 1996, 1997,…, 2010); C refers to the quantity of energy consumption;
P is the total power of agricultural machinery; t refers to the average an-
nual working hours of unit machinery; uc is the weighted average of unit
energy consumption (for diesel) or motor efficiency (for electricity).
The workload statistics for the four categories of agricultural opera-
tions, viz. o1, o2 , o3 and o4 , can be obtained from specifi c statistics.
Their average annual working hours of unit machinery t
o,y
can be deter-
mined from the following equation:
(2)
wherein AW is the actual workloads of the farming operation; up indicates
the weighted average of unit productivity; WS refers to the workload sta-
tistics; lf is the load factor, which is used for describing the actual work
intensity and is assumed to be proportional to the machinery power in
unit area; oec is the other effect coeffi cient obtained from the Correction
Module.
