Activity to reduce unit consumption of compressed air by its supply in ...

National Convention of Excellent Examples in Energy Conservation for Fiscal 2005
2005_PCECCJ_7_Nissan_Motor_Co._Ltd._Oppama_Plant
Annual production volume
Automobile
Number of
produced
automobile
Countermeasures
Decrease pressure
Introduction of tube end pressure control
Introduction of number of operated machines control
Measure to reduce pipe resistance
Measure to close facility primary valves
Reduction of air leak
Reduction of air feed time
Setting "no energy day"
Introduction of intermittent air blow
Electro-motorization of air equipment
Table of unit consumption transition
Air discharge electricity unit
consumption
Unit consumption per
automobile
Year
Fig. 2 Transition of air unit consumption
Year
Table 1 Measures to decrease air unit consumption
2. Understanding and Analysis of Current Situation
(1) Understanding of Current Situation
1) Outline of compressed air supply facility
Compressors are installed in two compressor rooms. The first compressor room has two
high pressure compressors and five low pressure compressors and their total capacity is
3280 kw. The second compressor room has four low pressure compressors and their total
capacity is 2190 w.
To supply air, processes are grouped into two systems (high pressure and low pressure) and
the air is looped after each process to lower the air feed pressure to the lowest allowable
level.
3
Unit consumption