HomeMy WebLinkAbout1/16/2008 - STAFF REPORTS - 2.I. ;O�pPLM SA4
i2
e
V s N
C �AoRt4� ,'tlP
City Council Staff Rego
DATE: January 16, 2008 CONSENT CALENDAR
SUBJECT, APPROVE THE REPLACEMENT OF THE SUNRISE COGENERATION
FACILITY CHILLER GENERATOR TUBE BUNDLE
FROM: David H. Ready, City Manager
INITIATED BY: Public Works and Engineering Department
SUMMARY
During the annual maintenance inspection of the chiller, a leak was discovered in the
generator section causing water to mix with the refrigerant, thus reducing its cooling
capacity. The chiller is over 21 years old. The last time the generator tube was replaced
in 1997, by the Carrier Corporation.
RECOMMENDATION:
Approve the replacement of the Sunrise Cogeneration chiller generator tube bundle in
the amount of$49,581.00 from Carrier Corporation, City of Industry, California.
STAFF ANALYSIS:
An internal tube leak has developed in the generator section on the Carrier 16JB
Hermetic Absorption Chiller. This leak was discovered during the annual scheduled
maintenance inspection in preparation for the summer peak cooling and electrical load.
Carrier conducted a leak test on the system and determined that water was diluting the
refrigerant, which severely diminished its cooling capacity. Carrier at this time
temporally repaired the tube bundle by plugging 4 tubes. Further deterioration of the
tubes could cause a rupture at anytime resulting in the emergency shutdown of the
facility. Should this occur during the peak summer period it would result in an expensive
repair with a long lead time for materials and the purchase of electricity from S.C.E. at
the higher summer rates. The facility has been scheduled for annual maintenance in
March, at which time the tubes would be replaced.
ITEM NO.
Per section 7.04.030 of the Municipal Code entitled "Special Expertise Procurement",
the City Council may award a contract "without competition when it is determined that
an unusual or unique situation exists, in that due to experience and expertise
demonstrated in prior contracts with the City a particular contractor is uniquely qualified
for a particular task, that makes the application of all requirements of competitive
sealed bidding or competitive sealed proposals contrary to the public interest."
As the manufacturer of this machine and all of the proprietary parts and equipment
needed to make the repairs, Carrier can provide the technical knowledge and factory
specified parts in the shortest time and with the expertise required. Carrier proposes to
provide all necessary materials and labor to replace all tubes in the generator section of
the chiller and will return the unit to original factory specifications. Carrier has a long
history of contracting with the City and has serviced both the Cogeneration and Airport
Chillers since 1985.
FISCAL IMPACT.-
Funds for this purchase are available in Account 520-5641-48700, Cogen Special Parts
and Repairs.
L
David J. Barakian, Director, Public Works/ DavidRady, anager
City Engineer