AIRFIELD ELECTRICAL IMPROVEMENT PROJECTS Innovations in a Low Bid Environment

AIRFIELD ELECTRICAL IMPROVEMENT PROJECTS

Innovations in a Low Bid Environment

John E. Joyner III, P.E.Matthew W. Kundrot, P.E.

3 October 2012

MILITARY DESIGN GROUP Delta Airport Consultants, Inc

AIRFIELD ELECTRICAL IMPROVEMENT

PROJECTS:


“Net Zero” Objective Considerations:

How is “Net Zero” Achieved?

•By reducing Operations and Maintenance costs (Energy)

•By producing energy from the airfield environment … topic for another day.

How is this Accomplished in a Low Bid Environment?

•By improving understanding of airfield electrical system design

•By improving project scoping and contracting relative to airfield electrical system design requirements

10-3-12 Net Zero through Emerging Technologies 2



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Base Utilities Electrical Distribution Overview:

Definition of Electrical PowerPower = Voltage x Current (Watt = Volt x Amp)

Two Electrical Power Delivery ModesConstant Voltage – Voltage remains constant andthe current fluctuates based on the load demand(Typical voltages – 120, 208, 240, 277, 480)

Constant Current – Current remains constant andthe voltage fluctuates based on the load demand




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Examples of Constant Voltage Based Systems:

Air Handling Systems Fire Suppression SystemsAutomatic Sprinkler Systems Food Service EquipmentBoiler Plants Industrial SystemsChilled Water Plants Medical SystemsConveying Systems Power DistributionDomestic Water Distribution Refrigeration SystemsEmergency Power Generation Sanitary Drainage Systems




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Examples of Constant Current Based Systems:

Airfield Electrical Systems. . . . . . . Very few others due to strict performance requirements (an aircraft hydraulic control system which operates at 4,000 psi provides a good analogy)




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Scoping Disconnect:

95% + of all electrical projects on a military installation are constant voltage based.

Understandably, the project methodology associated with these systems is often applied to the airfield electrical system.

However, what is desirable in the “constant voltage” world is often counterproductive in the “constant current” world of the airfield electrical system. The misapplication of design methodology can result in energy waste and unsafe working conditions for maintenance personnel.




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SOLUTION: Improve the Project Scoping Process

1)Review the components of the airfield electrical system and understand the corresponding stakeholder requirements.

2)Explain the most common type of disconnects associated with airfield electrical system projects

3)Illustrate how scoping an airfield electrical system project from an O&M perspective supports the mission and the concept of “Net Zero”




PROJECTS:


AIRFIELD ELECTRICAL SYSTEM COMPONENTS - Pavement Lighting(Runway/Taxiway Edge Lights, Touchdown Zone Lights, and Centerline Lights)




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AIRFIELD ELECTRICAL SYSTEM COMPONENTS – Airfield Signs(Taxiway Guidance Signs, Runway Hold Signs, Distance Remaining Signs)




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AIRFIELD ELECTRICAL SYSTEM COMPONENTS - Approach Lighting(REILs, ALSF-1 & ALSF-2, PAPI)




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AIRFIELD ELECTRICAL SYSTEM COMPONENTS – Lighting Control(Touch Screen, Monitoring Capability, Configured for Mission Operations)




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AIRFIELD ELECTRICAL SYSTEM COMPONENTS – Power Equipment(Stand Alone and Switchgear Cabinet Constant Current Regulators)




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Five Main Scoping Disconnects Associated with Airfield Electrical System Projects:

1)Repair by Replacement of Fixtures – LED Lights, Signs, etc.2)Replace in Kind – Constant Current Regulators3)Minimize the Number of Constant Current Regulators4)Ignore the Input of Operations and Maintenance Personnel5)Utilize Inexperienced Design & Construction Personnel




PROJECTS:


#1a. Repair By Replacement - Airfield Signs:

Pro: An old airfield sign is replaced with a new sign

Con: The sign is placed and/or labeled incorrectly.

Solution: Develop an Airfield Signage Master Plan

Benefit: Improvement dollars are only spent once




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Andrews AFB Example Sign Plan

Insert Andrews AFB Sign Plan Images here




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#1b. Repair By Replacement - Airfield Lights

Pro: Replacing incandescent fixtures with LED fixtures will decrease power consumption by 50%

Con: Existing cable and transformers are deteriorated and “leaking power” therefore NO energy savings.

Solution: Assess condition of cable and lighting infrastructure and replace in “usable” sections.

Benefit: Long term cost reduction and improved controls resulting in further energy savings.




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Examples of Airfield Lights –

Insert pictures of old NAS Pensacola and NAS Corpus Christi lighting fixtures here




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#2. Replace in Kind - Constant Current Regulator

Pro: Equipment procurement, no engineering required

Con: Existing equipment is oversized

Solution: Assess the airfield electrical system from a load

demand perspective. Replace the system configuration, not just the system components

Benefit: Decreased operations and maintenance costs




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Examples Regulator Replacement –

Insert pictures of old NAS Oceana and NAS Corpus Christi CCR’s here




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#3. Minimize the Number of Current Regulators

Pro: Lower number of constant current regulators to maintainCon: Increased operations and maintenance costs

Solution: Design airfield lighting system configuration from an operations perspective

Benefit: Improvement in safety and a reduction in operations and maintenance costs, operational impacts, and energy consumption




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Examples of Minimizing the Number of Constant Current Regulators

Insert pictures of old NAS Oceana, NAS Corpus Christi, and MCAS Yuma CCR’s here




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#4. Ignore Input from O&M Personnel

Pro: Decreases contracting and design time

Con: The contractor determines what’s best for mission support

Solution: Proper project scoping with end users conducted by personnel familiar with airfield electrical system design

Benefit: Increased mission support plud decreased project and O&M costs




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Examples Ignoring Input from O&M Personnel:

Insert pictures of NAS Patuxent River and Lackland AFB Airfield Electrical Vaults here




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#5. Utilize Inexperienced D&C Personnel

Pro: Decreases contracting and design time

Con: The contractor determines what’s best for mission support

Solution: Utilize Design and Construction personnel which have experience in airfield electrical system work

Benefit: Increased mission support plus decreased project and O&M costs




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Examples of projects executed by Inexperienced Design and Construction Personnel

Insert pictures of airfield electrical system projects executed by inexperienced design and construction personnel




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Successfully Executing Airfield Electrical Projects in a Low Bid Environment

Traditional Design-Bid-Build

Design-Build




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Traditional Design-Bid-Build

• Require that design and construction personnel haveexperience in airfield electrical system projects

• Solicit input from stake holders on all projects

• Scope projects from an “Asset Management” perspective




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Design-Build

• Require that design and construction personnel haveexperience in airfield electrical system projects

• Evaluate proposals on total project cost, not just construction cost

• Utilize IDIQ contractors to improve accountability




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Summary:

1)Prepare a Master Plan for infrastructure replacement prior to fixture replacement; replace infrastructure in usable units2)Replace Constant Current Regulators based on Load3)Configure System from an Operations Perspective4)Solicit the Input of Operations and Maintenance Personnel5)Utilize Experienced Design & Construction Personnel




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Questions?



AIRFIELD ELECTRICAL IMPROVEMENT PROJECTS Innovations in a Low Bid Environment

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