ENERGY COST SAVINGS CASE STUDIES

These following are real field installations that dramatically illustrate E-Pak's energy and cost savings potential.

Case #1 - E-Pak vs. Water Cooled

65 Unit Condominium Building, Phila, Pa
Capacity 145 Tons with 44 degrees LWT @ 78 degrees F WB Air on the condenser ..... Replacement of (2) McQuay 75-ton water-cooled centrifugal chillers.

The condominium board had received bids from several mechanical contractors, based upon bid documents prepared by consulting engineers, for the replacement of the existing (17) year old McQuay water cooled centrifugal water chillers and the existing cooling tower.  Since these were comparable to the cost of the E-Pak installation, the consulting engineers recommended E-Pak for its dramatic energy savings.

The rate analysis prepared by PECO Energy Company projected annual energy cost savings of $14,000 through the application of E-Pak.

Based upon an annual savings of $14,000.00 and a purchase price of $85,000.00, the E-Pak will pay for Itself through the energy cost saved within (6) years.

Case #2 -  E-Pak vs. Air Cooled

A publishing Company - Phila., Pa.
Printing & Binding of Bibles
Capacity 202.8 Tons with 44 degrees F LWT @ 78 degrees F WB Air on the Condenser
E-Pak. ECT-205-310L

The input load profile data was developed using the Trane Company load estimate software in conjunction with the 30 year weather data file developed by the National Oceanic and Atmospheric Administration (NOAA).

The load profile data, converted to equivalent energy consumption in KW-hrs. for the respective chiller equipment (Air cooled vs. the E-Pak evaporative cooled) based upon the published equipment ratings, and was then processed by PECO Energy Company, the publishing company's energy supplier, to formulate an estimate of their monthly electric bill for each of the chiller systems.

The publishing company's rate analysis:

The rate analysis prepared by PECO Energy Company for this 200 ton chiller installation is based upon a 5 day/week chiller operation in lieu of the normal 7 day/week operation and provides for chiller shutdown when the outdoor temperature is 55 degrees F or lower for air unit economizer operation.

These conditions constitute an extraordinarily low load profile of 276,000-ton hours for this 200-ton unit while a more normal air conditioning load profile would be approximately 400,000 to 450,000 ton hours with economizer operation.

PECO Estimate of E-Pak Energy Savings = $25,000.00 per year

Adjustment for 7 day operation

$25,000.00 x 7/5 = $35,000.00

Based upon an annual savings of $35,000.00 for a normal 7-day load profile and a purchase price of $128,000.00, E-Pak will pay for Itself through the energy cost saved in 3.6 years.

These examples of E-Pak energy savings are based upon PECO Energy Company rates.  While E-Pak's performance and efficiencies will remain consistent with its published ratings, the actual dollar savings will vary with the rate structure of individual local utilities at the installation site .