4.1] A multi-storied shopping mall has installed 5 x 110 TR reciprocating compressors of which  four compressors are in use and fully loaded for 14 hours per day. The specific power  consumption of reciprocating compressor is 0.8 kW/TR. Due to higher energy cost the  shopping mall chief engineer has decided to replace reciprocating compressors with screw  compressors having specific power consumption of 0.65 kW/TR. The chief engineer needs  following input from energy consultant:  • Annual energy bill savings (for 320 days operation). Present unit cost is $ 6.00 per  kWh? (show all calculations)

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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[4.1] A multi-storied shopping mall has installed 5 x 110 TR reciprocating compressors of which 
four compressors are in use and fully loaded for 14 hours per day. The specific power 
consumption of reciprocating compressor is 0.8 kW/TR. Due to higher energy cost the 
shopping mall chief engineer has decided to replace reciprocating compressors with screw 
compressors having specific power consumption of 0.65 kW/TR. The chief engineer needs 
following input from energy consultant: 

• Annual energy bill savings (for 320 days operation). Present unit cost is $ 6.00 per 
kWh? (show all calculations)

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