Difference between revisions of "RCEA energy audit reviews/Food for People"

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Revision as of 23:33, 11 December 2009

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Figure 1 Food For People 14th Street Entrance Eureka, CA Photo by Rebecca Ransom

RCEA Energy Audit Review/Food for People

Food for People is designated as Humboldt County California's food bank. Food for People operates 13 food distribution programs throughout Humboldt County, including The After School Snack Program, Backpacks for Kids Program,The Gleaning Program, and direct food distribution on Wednesday's and Fridays to an average of 1000 households per month. [1] The Redwood Coast Energy Alliance (RCEA)was contracted by Anne Holcomb, Executive Director of Food For People, to implement an energy efficiency upgrade, consisting of lighting retrofits. A retrofit is the addition of new or modified parts or equipment not available or considered necessary at the time of manufacture.[2]

The Retrofits

The retrofits were completed on 9/8/2008. The RCEA and contractors replaced one four foot fluorescent lighting ballast and lamps with a four foot T8 fixture, eight incandescent floodlight lamps with Compact Fluorescent Lights (CFL), and two regular incandescent lights with Compact Flourescent Lights. CT6, A8) The RCEA estimated the client would save $217.50 per year and offset an estimated 783lbs/year CO2. The cost of the upgrades was $324.21. RCEA paid $224.09, for a cost of $199.

Prior to Retrofit After Retrofit
row 1, cell 1 row 1, cell 2 row 1, cell 3
row 2, cell 1 row 2, cell 2 row 2, cell 3
  • The client did not change their lightning habits after the retrofit, but according to Anne Holcomb, the office employees have been making an effort to turn off all the computers in the evenings when no one is working.
  • According to Holcomb, the retrofits would not have done the lighting retrofits without help from the RCEA. The RCEA approached the client about the retrofits. 
  • The client moved forward with the project in the event that they could save money by using less kwh. The client is considering a Photovoltaic Solar Power System for the future, therefore it is important to the client to make the business's energy usage as efficient as possible. Utilities are one of the highest cost for this client. The client has two walk-in freezers and one walk-in refrigerator, as well as three newer refrigerator units in the lobby. The majority of Food for People's energy usage comes from the refrigeration units.

Data Analysis

  • The overall energy usage from Sept 2008- Sept 2009 (restate when the energy retrofit was done) was up 3% from the same time period in 2006-2007. This is most likely due to the malfunctioning refrigeration units discovered by the Engineers without Borders, as well as the addition of the new upright refrigerators in the lobby.(given the number of lights and the watts they draw, the hours they were used, how much do you think it should havegone down?)
  • By looking at Figure 2, it appears as if the malfunctioning refrigeration unit was running at its peak in April of 2009, and went off line for repairs in May 2009 (are these times known?), resulting in significant (W7) savings in May 2009.
  • By just looking (W8) at yearly averages for kWh usage, Food For People's energy demand has been going up, but by looking at the bar graph (likely easier to read as line graph) in Figure 2, it can be seen that there are 3 (see above) months where the energy usage in 2009 is less than the same time period in 2008 (W.12). The drop in power demand is most likely due to the repairs made on the refrigeration unit.(WHEN were these made.  This is important in your analysis, call engineers without borders).
  • For the three good months of data (which are?), the energy demand went down 314 kWh, and saved 164.54 lbs of CO2.  These results are summarized in Table 1.(should be table, C3, C4, cost went up but energy use went down, explain)
  • More energy savings are expected after the refrigeration upgrades are completed.(A1 what were RCEA's predictions?)

Table 1

Month 2008 kWh 2009 kWh kWh savings COOffset in lbs (.52lbCO2/kwH)
June 2418 2241 177 92.75
July 2228 2137 91 47.68
August 2239 2193 46 24.10
3 month totals 6885 6571 314 164.54

Figure 2 File:RCEAFoodForPeople.pdf

Future Retrofits

  • Food For People is in the planning process currently for some refrigeration upgrades. These upgrades will include a timer controlled evaporator fans and new ECM's (i.e.energy efficient motors)(dont use acronym). Some local engineers from Engineers without borders (capitalization) came in and did a data monitoring project that involved using KW meters to figure out how much each of the refrigeration units are using and then address issues that might come up (ike?). Because of this investigation, the engineers were able to locate a unit that was extremely (W9) low on coolant with its compressor running 24 hrs a day. The RCEA and the people from Engineers without borders have been helping get the grants to do the refrigeration upgrades, and Anne (last name?) from Food for people thought was one of the best parts about working with the RCEA (W.10). The refrigeration upgrades include a timer controlled evaporator fan, and other upgrades aimed at making the refrigeration units as efficient as possible (redundant). With and estimated savings of 6435 KWH/year, and a $965.21 savings per year, Food for People Executive Director, Anne Holcomb, is ready for these retrofits to happen (And how are they going to be funded? what is the cost? the simple payback?  less than the lighting projections?), which should be very (W9) soon.


Foodfor people 001.JPG

References (C10, C12)

  1. Food For People
  2. Merriam-Webster Online, date:1953, Retrieved on May 11, 2009, from http://www.merriam-webster.com/dictionary/retrofit