FORM OF PROPOSAL
PRE-PURCHASE OF WATER CHILLER
NEW POWER PLANT
NORTHERN KENTUCKY UNIVERSITY
HIGHLAND HEIGHTS, KY
Award of Contract will be made based on the Base Bid for two chillers and the Modified Life Cycle Cost Calculations defined as follows:
MODIFIED LIFE CYCLE COST CALCULATIONS
· NOTE: Modified Life Cycle Cost Calculations and all blank spaces must be filled out in their entirety by the Bidder or the Bid will be considered non-responsive and rejected.
· Centrifugal Refrigeration Machine (CRM)
· CRM Model ______
· Refrigerant ______
· Drive ______Open ______Hermetic
· Speed ______Constant ______Variable
NOTES:
· This modified life cycle calculation considers the first cost (which is the bid price) and the electric utility costs to operate the machine for 20 years. Maintenance costs will not be considered.
· The Present Worth Value Factor is based on a 20-year life and an interest rate of 6%. Thus Pvf = [(1.06)20 – 1)]/0.06(1.06)20 = 11.470
· The KW/Ton values for each bin must be filled in by the vendor. Values to three decimal places will be allowed (example 0.591). The value indicates a limit that will be used in factory testing. Therefore, 0.591 represents all values from 0.5900 to 0.5910 but does not represent 0.5911. 0.5911 is represented as 0.592.
· Condenser water flow rate is 7500 GPM. Chilled water flow rate is 6000 GPM, and the discharge temperature is 42 deg F.
· If there is a math error in the extension, it will be corrected but revised KW/Ton values may not be entered.
CALCULATION OF ANNUAL CONSUMPTION COST2500 TON CHILLER
Complete the following chart
(Do not change indicated values)
Maximum allowed power input at 100% = .60 KW/Ton
LOAD / ECWT
2 / LCHWT
1,3 / OPR. TONS / VAR. SPEED CONT. TONS
** / TOTAL TONS / HOURS/YR. / $/ KWH
4 / KW/ TON
* / $ COST/YR
5
100% / 85 / 42 / 2500 / 36 / $0.05
91% / 79 / 42 / 2275 / 190 / $0.05
81% / 76 / 42 / 2025 / 417 / $0.05
72% / 73 / 42 / 1800 / 599 / $0.05
62% / 71 / 42 / 1550 / 813 / $0.05
53% / 67 / 42 / 1325 / 875 / $0.05
44% / 63 / 42 / 1100 / 857 / $0.05
34% / 60 / 42 / 850 / 692 / $0.05
25% / 60 / 42 / 625 / 641 / $0.05
TOTALS / -- / -- / 5120 / -- / --
TOTAL ANNUAL CONSUMPTION COST ------à
CALCULATION OF MODIFIED LIFE CYCLE COST
A. Bid Price (Initial Cost) for two Chillers $______
Inclusive of materials, supplies, labor, delivery and services required to complete this procurement in accordance with the specifications and contract documents and any duly issued addenda for a Lump Sum Amount.
B. 20-Year Present Worth of Annual Electrical Costs
Total annual consumption of chiller $______
Total annual consumption of condenser water pump Ft Hd ______x $452 $______
Total annual consumption of chilled water primary pump Ft Hd ______x $361 $______
Present worth of all electrical costs (Chiller + Condenser Pump + Primary Pump) x 11.470
$______
C. Total Modified Life Cycle Cost (A + B = C) $______
See General Notes on Page 3
NOTES:
1. LCHWT – Leaving chilled water temperature.
2. ECWT – Entering condenser water temperature.
3. Fouling factor for evaporator - - 0.0001, and condenser - - 0.00025.
4. Base electrical energy cost of $.05 per KW-Hr.
5. Based on Cost: $ = KW/Ton x gross tons x hours/year x $/KWH.
KW/Ton will be factory tested at four different points of entering condenser water temperature. One (1) point at 100% load and 85 deg. F ECWT and the remaining three (3) points will be selected at the owner’s option. One of the additional three (3) points could include testing under partial load at 25% and 85 deg. F ECWT. This point could be requested to assure no surging is present. This point is not to be considered in the modified life cycle cost analysis.
Operating tons shall be increased as required to include additional tonnage (gross tons) added for open motor/compressor design and/or variable speed control.
Cost of pump operation ($/Ft Head) was calculated as follows:
HP = GPM x 1.0 Ft x SP. GR.
3960 x Pump Efficiency
HP x .7457 = KW Cost of electrical power = $.05/ KW-Hr
Efficiency = 0.8 Annual operating hours = 5120
$ for pump electrical consumption costs are calculated as:
$ = Condenser Water Pump Head (condenser pressure drop) in Ft Head x $/ Ft of Head
$ = Primary Chilled Water Pump Head (evaporator pressure drop) in Ft Head x $/Ft of Head
METHOD OF AWARD
Award of Contract will be to that responsive, responsible firm having the lowest Total Modified Life Cycle Cost (line C) meeting all the terms, conditions, specifications, etc., of this procurement.
Bid Bond and Performance/Payment Bond will be based on Bid Price, Line A.
Actual amount to be written on the Contract Document will be the Bid Price of that respondent who has the lowest Total Modified Life Cycle Cost.
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