Ryde College Energy Audit - Cost Benefit Analysis

441 views

Published on

An examination of some aspects of the college energy audit, with a cost benefit analysis of some of the options for saving energy and money.

Published in: Business
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
441
On SlideShare
0
From Embeds
0
Number of Embeds
13
Actions
Shares
0
Downloads
0
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Ryde College Energy Audit - Cost Benefit Analysis

  1. 1. Stakeholder Issues relevant to Energy reporting and making recommendations Paul Boundy 9 May 2013
  2. 2.       Reduce fossil fuel energy use and thus CO2-e Emissions Showcase sustainability Reduce energy expenditure thus save money Short return on investment periods Adding Electrical submeters Obtain relevant baselines Consumption GJ per capita and per m2  Emissions in tCO2-e per capita and per m2  Comparison to improvements in future years  Comparison between campuses 
  3. 3. Short Payback Period Low Adjusting Thermostat temperature band to 19-25 DegC Capital Cost Replace 50W Halogen lights with 35W IRC lights Higher Replace 36W T8 fluoro with T5 Capital Cost Payback Period yrs 0.03 0.05 2.3 Capital Cost $ 4,900 5,600 109,800 Long Payback Period Install VSD on Cooling Tower fan Bldg H Install lighting motion sensors in bathrooms Convert Constant Volume to VAV Apply Solar Reflective paint to rooves of H, B, C & D Install 100kW Solar PV on Bldg A Payback Period yrs 6.1 8 16.7 8.3 8.4 Capital Cost $ 2,500 11,400 87,300 36,600 273,100 Interpreted from Table 1.2 Summary of Recommendations Obvious solutions:  Low capital cost and short pay back period But where are the greatest GHG reductions? Short Payback Period Low Adjusting Thermostat temperature band to 19-25 DegC Capital Cost Replace 50W Halogen lights with 35W IRC lights Higher Replace 36W T8 fluoro with T5 Capital Cost   Payback Period yrs 0.03 0.05 2.3 Capital Cost $ 4,900 5,600 109,800 GHG Long Payback Period Savings tonnes CO2/pa 187.1 Install VSD on Cooling Tower fan Bldg H 20.8 Install lighting motion sensors in bathrooms 140.3 Convert Constant Volume to VAV Apply Solar Reflective paint to rooves of H, B, C & D Install 100kW Solar PV on Bldg A Payback Period yrs 6.1 8 16.7 8.3 8.4 NSI/Ryde needs to lead / showcase / “Walk the Talk” Worth investing in 100kW Solar PV System Capital Cost $ 2,500 11,400 87,300 36,600 273,100 GHG Savings tonnes CO2/pa 1.7 8.1 23.6 17.7 135.8
  4. 4.  HVAC is the biggest user of energy on the site. Energy Electricity Gas    46% 38% 59% 11,200 GJ 1,576 MW 5,527 GJ $324,000 $243,000 $174,000 Any improvement is welcome. Easy choices: Adjusting thermostats and adding Variable Speed Drive to cooling tower. Converting Constant Vol to VAV Cost $87,000 Payback 16 years But a worthwhile investment
  5. 5.   Any Questions? Reference: Coffey Environments Australia Pty Ltd 2013, TAFE NSW Northern Sydney Institute, Ryde College, Level 2 Energy Audit Report, NSW Office of Environment and Heritage, Sydney, Australia

×