RFQ Amendment 0004.pdf

W81EWF11542321

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print)

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83)

Prescribed by GSA

FAR (48 CFR) 53.243

The purpose of this amendment is to revise the Description of Requirement in Section C and extend the solicitation closing date from 12

August 2021 to 25 August 2021. See Summary of Changes.

1. CONTRACT ID CODE PAGE OF PAGES

J 1 5

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

16C. DATE SIGNED

BY

16B. UNITED STATES OF AMERICA15C. DATE SIGNED15B. CONTRACTOR/OFFEROR

(Signature of Contracting Officer)(Signature of person authorized to sign)

8. NAME AND ADDRESS OF CONTRACTOR (No., Street, County, State and Zip Code) X W913E521Q0022

X 9B. DATED (SEE ITEM 11)

22-Jul-2021

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer X is extended, is not extended.

Offer must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended by one of the following methods:

(a) By completing Items 8 and 15, and returning 1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE

RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN

REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(B).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO.

5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

10-Aug-2021

CODE

ERDC CONTRACTING OFFICE

HANOVER OFFICE

72 LYME ROAD

HANOVER NH 03755-1290

W913E5 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W913E521Q0022

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

SECTION A - SOLICITATION/CONTRACT FORM

The required response date/time has changed from 12-Aug-2021 12:00 PM to 25-Aug-2021 12:00 PM.

SECTION C - DESCRIPTIONS AND SPECIFICATIONS

The following have been modified:

DESCRIPTION OF REQUIREMENT

The Cold Regions Research and Engineering Laboratory (CRREL) requires a new cold glycol chiller skid unit, portable, and fully self-contained except for Glycol inlet and outlet and 480V shore power supply. This unit must be supplied in conjunction with a glycol tank and circulating equipment to allow for successful operation of chilled glycol loops that already exist in CRREL’s Geophysical Research Facility. No modifications to the glycol loops that already exist are within scope. The unit must use ammonia as a refrigerant,have a refrigerant cooling process glycol, and chill the glycol to a range of temperatures from -10F to 35F, with one degree increment control on a touch-screen controller. The entire unit must be rated to operate outdoors, and control voltage and control switches must be in a separate box from 480V shore power so that adjustments can be made by operators who are not cleared to open

480V panels.

Unit Capabilities and Specifications:

1. Refrigeration Performance Requirements:

i. The system must be capable of providing 2.53 tons of refrigeration (TR) (3630,000

BTU/Hr) or better while chilling glycol to a target temperature of 35F.

ii. The system must be capable of providing 2.255 TR (27,000 BTU/Hr) or better while chilling glycol to a target temperature of 28F.

iii. The system must be capable of providing 1.25 TR (15,000 BTU/Hr) or better 5 TR while chilling glycol to a target temperature of -10F.

iv. The system must be capable of operating at a full range from loaded to unloaded to supply cooling from target glycol temperatures across a range from -10F to 35F.

v. A hot gas bypass system or equivalent must be incorporated to reduce power consumption and increase system life when operating at low loads.

vi. The compressor must be selected to allow operation at a wide range of loads.

vii. System operation should be A touch-screen control must allow system refrigeration operation based on selecting a process glycol temperature with the control system making adjustments as needed to provide that temperature..

viii. A defrost or melt-out capability by supplying hot glycol must be available to be manually triggered by the operator.

ix.viii. Coolant in: 1” MPT.

x.ix. Coolant out: 1” MPT.

2. Glycol System Specifications: (May be located on the chiller skid or provided separately)::

i. The glycol system components may be supplied separately from the primary refrigeration unit, but the Vendor must connect them together as part of the installation process and test for operation.

i.ii. The circulating pump must have adjustable settings for 10gpm OR 20gpm.

ii.iii. The system must be plumbed to allow for the pump to be bypassed and operation with an outside pump in a system being connected to, using manual isolation valves.

iii.iv. A flow meter must provide the safety control for the chiller barrel, cutting out refrigeration operation if flow falls below 5 gpm on the glycol circulating system.

iv.v. Glycol pump must supply 1.0 hp at 10 gpm, 2.0 hp at 20 gpm.

v.vi. Peak pressure rating for glycol system must be not to exceed 150 psi; normal pressure should not exceed 80psi.

vi.vii. The system must be designed for both ethylene glycol/water mixes AND Dow Norkool SLH at concentrations up to 60%, without changing any components when switching between processing cooling applications.

viii. A 60 gallon glycol reservoir tank for buffering the unit from the application in use should be provided. This does not need to be physically part of the primary unit but will be procured and installed as a package. This tank should also connect to a separate glycol heater for melt-out.

1.

3. Glycol HeaterA 30 gallon hot glycol reservoir for melt-out/defrost must be installed and maintained at a temperature of 100F based on waste heat from the refrigeration loop.

3.

i. A glycol heater for manual defrost will be provided. This can be a separately powered, separate unit which heats the 60-gallon reservoir tank. It is not necessary for this to operate at the same time as the refrigeration unit.

2. A manual hot glycol defrost cycle with push-button control and automatic return to normal operation should be programmed.

4. Refrigeration Unit Operating Specifications:

i. The system must use ammonia as the refrigerant, in an ultra-low-charge configuration.

i. The ammonia charge cannot exceed 35lbs; the worst case leak from a single vessel must not exceed 20lbs.ay use any refrigerant necessary for most efficient operation.

ii. 480V power supply and box must be separated from controls voltage in its own box;

programmable thermostat and all switches and controls must be in a separate control box for safety purposes.

iii. It is optional for controls voltage and crankcase heater power to be separately supplied on a different voltage.

ii.iv. The unit shall come equipped with a 75-ft shore power extension cord with a mechanical circuit interlocking plug.

iii.v. The system must be air-cooled and completely standalone without a requirement for processing cooling water hookups.

iv.vi. The system compressor horsepower is expected to be at approximately 5 to 7.5 horsepower;

the vendor must prepare calculations for Government review showing how this meets the cooling capacity requirement.

v.vii. The unit must have a compressor interlock flow switch for the cooling system.

vi.viii. The unit must have a compressor interlock flow switch for the glycol through the chiller barrel.

vii.ix. System must have plate-and-frame heat-exchanger(s).

viii.x. System must have subcooler.

ix.xi. System must have fan cycle switch.

x.xii. Refrigerant system must be rated for 150psi low pressure to 350psi peak short-term high pressure (375psi safe).

xi.xiii. System should be fitted with suction accumulator and oil separator unless plans of the system are presented to the Government for approval before construction begins showing a configuration which does not require these components to correctly and safely function.

xii.xiv. A crankcase heater should be supplied for operations at Outside Air Temperatures from -30F and above. It is assumed -30F would be a short duration extreme outdoor condition in the dead of winter and this requirement should be considered accordingly; however, operation during such an event must be guaranteed.

xiii. An on-unit alarm and ammonia detector must be incorporated into the skid unit.

5. Electrical Specifications:

i. Unit electrical power supply must not exceed the capacity of a 480V, 3 phase circuit with a

20A breaker. The breaker amps on 480V, 3 ph must not exceed 20A.

ii. 480V power supply and box must be separated from controls voltage in its own box;

programmable thermostat and all switches and controls must be in a separate control box for safety purposes.

iii. It is optional for controls voltage and crankcase heater power to be separately supplied on a different voltage.

iv. The unit shall come equipped with a 75-ft shore power extension cord with a mechanical circuit interlocking plug.

6. Volumetric and Frame Specifications:

i. The unit length must not exceed 15 feet.

ii. The unit width must not exceed 6.5 feet.

iii. The unit height must not exceed 6.5 feet.

iv. The unit must have six hoisting eyes on the corners and in the middle of the frame, length-wise, with clear access for hoisting (submittals should indicate this).

v. The unit frame must be designed to be forkable by a heavy duty fork truck, with appropriate fork points, or to use self-levelling jacks so that a trailer can be driven under it and it can be lowered securely onto the trailer bed..

vi. The unit frame must be self-levelling, with screw-jack adjustable feet which allow it to be levelled for operation on an uneven surface. These jacks must be present even if the unit is provided in a configuration for a drive-under trailer instead of fork-lift points.

vii. A sufficient number of support feet or a bottom contact frame for the unit must be provided so ground pressure does not exceed 30 psi.

7. General Specifications:

i. The unit must be designed to operate completely unprotected in an outside environment. If a roof for the unit is required, it should be integral to the frame. In this case, the total height may exceed 6.5 feet.

ii. The unit must be painted with durable, marine-grade paint for metal exposed to a nearby oceanic salt water environment.

iii. The unit must be designed to operate in an OAT range from -30F to 100F with 100% humidity, with the requirement it will keep running in extreme cold nighttime conditions in

Northern New Hampshire. y.

iv. The crank-case heater must be able to operate off a separate low-voltage power supply so the unit can be kept on standby without being plugged in to 480V power.

v. Pumps must be stainless steel.

vi. Reservoirs and glycol tanks must be stainless steel.

vii. Heat exchangers selected for operation with ammonia viii.vii. Cooling system sized for no loss of capacity in hot weather.

ix.viii. Designed to operate continuously for 9 months without down-time for maintenance or emergencies (6,500 hours of continuous operation per annum as a duty cycle).

x.ix. Designed to go through a single non-operational maintenance cycle per year during the 3-month non-operational period.

8. Other Specifications and Requirements:

i. Vendor must supply list of all replacement parts, all checks, and all other maintenance and service to be conducted at single annual maintenance down-time.

ii. Vendor must supply detailed checklists and instructions for maintenance during regular operation.

iii. Vendor must supply training video for operating the unit.

iv. Vendor must supply two days of on-site operation and maintenance instruction.

v. Vendor must supply shipping to 72 Lyme Road, Hanover, NH. 03755.

vi. All training personnel and delivery personnel must be US citizens.

vii. If one required rating is different from another in these specifications due to the precise relationship between, for example, power, electrical supply amperage, cooling capability, etc, then it is required that the vendor use the more demanding specification in sizing the system.

Pre-award submittals:

The following submittals must, at minimum, be included in the vendor’s response to the solicitation for this unit for review:

1. Calculations showing that the proposed configuration meets the power supply limitation requirements.

2. Calculations showing that the proposed configuration meets the ammonia charge limitation requirements.

3.2. Calculations showing that the proposed configuration meets the cooling capability requirements.

4.3. Design drawings showing that the basic unit configuration meets that required and includes a process glycol system configured as required.

Structuring the Price Proposal:

1. We ask the vendor to provide a proposal with the price to purchase the chiller unit as one item including , the ancillary glycol heating and circulating equipment, the delivery as a second item, the training as a third item, and the post-award submittals and post-award conference to review and approve them as a forth item.

2. Ship to Location: Shipping to CRREL, 72 Lyme Road, Hanover NH 03755.

Post-award submittals:

1. 100% detail design drawings.

2. Complete list of all parts to be used in the system.

3. Electrical wiring diagrams.

4.3. Ammonia safety system configuration design.

5.4. Operator’s manual and trouble-shooting guide.

(End of Summary of Changes)