4] 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:

Structural Analysis
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ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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Let R6.00=$6.00 , Energy Management Q4

[4] 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:
• Comparison of power and electricity consumption of both reciprocating and screw
compressors?
• Annual energy bill savings (for 320 days operation). Present unit cost is R 6.00 per
kWh.
Transcribed Image Text:[4] 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: • Comparison of power and electricity consumption of both reciprocating and screw compressors? • Annual energy bill savings (for 320 days operation). Present unit cost is R 6.00 per kWh.
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