Natural Gas vs. Electric Cooling 
Simple Payback Analysis Tool
  
This tool provides a simple cost comparison analysis for various cooling technologies(>100 Tons) based on size, energy rates, and performance. These calculations use average pricing, efficiencies, & maintenance costs for the gas and electric technologies considered. 

The results produced by this tool are intended solely as a preliminary evaluation of potential large-scale gas cooling, or small-scale gas cooling and heating options. For a more accurate analysis, the user should seek the assistance of a qualified engineering firm with input from appropriate manufacturers.

  

Analysis Assumptions 

 
  Capital Cost ($/Ton) Installation Cost ($/Ton) Maintenance Cost ($/Ton-Hr/Yr) Equipment Life (Years) Efficiency Electric Demand (KW) Gas Usage (BTU/Ton) Recoverable Heat (Therm/Hr)
Electric Centrifugal Chiller 250 50 0.004 20 0.7 KW/TON 70 0 0
Single Effect Absorption 250 50 0.006 20 0.65 COP 10 15000 0
Double Effect Absorption 435 50 0.006 20 1.3 COP 10 9200 0
Engine Driven Chiller 550 100 0.01 20 1.57 COP 5 5700 0
Engine Driven Chiller w/heat recovery 550 130 0.01 20 1.89 COP 5 5700 1.71
     

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