King Fahd University of Petroleum and Minerals

CEM 512Value Engineering

Term ProjectTurbine Fuel Gas Heater

Prepared by: Ahmed S. Al ZahraniID# 200295

To: Dr. Sady Assaf

August 8, 2005

OUTLINE

INTRODUCTION

JOB PLAN

Information Phase

Creative Phase

Judicial Phase

Development Phase

Presentation &Implementation Phase

Summary

INTRODUCTION

• In gas compression plant, the compressors are driven by a combustion gas turbine.

• For best turbine performance, the fuel gas temperature should be at certain temperature (120 – 140 deg F).

• Electric Coil heater that provide sufficient heat to fuel gas.

• The objective is to find better heating medium using Value Engineering Technique.

INFORMATION PHASE• The information sources:

– Equipment Manual– Plant Operating Manual– Material Control Group– Planners– Colleagues

Performance Criteria

• Objectives & Desired Criteria:– To give sufficient heat to fuel gas to be in the

acceptable range.– To control and maintain that desired

condition.

• Desired Features & Criteria:– Minimum construction cost.– Easy Control and Operation.– Safe Operation.– Easy Maintenance.

Cost Information

ItemCost,

$

Electric Coil30,000

Wiring & Installation5,000

Instrumentation5,000

Total40,000

Function Identification

• WHAT DOES IT NOW DO?

• WHAT MUST IT DO?

VERBNOUN

SupplyHeat

ControlTemperature

VERBNOUN

SupplyHeat

ControlTemperature

EnhancePerformance

MinimizeMaintenance

Function Identification

To Meet TheRequired Condition

To IncreaseTemperature

Have HeatingMedium

WHY? FUNCTIONHOW?

Beside the Electric Heater:• Steam Jacket.• Exchange Heat Between Hot Lube Oil

and FG.• Exchange Heat Between Process Gas

and FG.• Eliminate the Heater.

CREATIVE PHASE

JUDICIAL PHASE

Goals, Criteria, Functions, FeaturesRaw

ScoreAssignedWeight

A. Construction Cost310

B. Safety27

C. Easy Maintenance13

D. Easy Operation & Control13

BCD

AA-2A-1D-1

BB-1B-1

CC-1

HOW IMPORTANT

3. Major Preference

2. Medium Preference

1. Minor Preference

JUDICIAL PHASE

IDEASCos

tSafet

yMaintenanc

eOperation

TOTAL10733

Proposed Idea:Electric Heater

2322534

1. Steam Jacket4344851

2. Heat Exchange with Lube Oil

4133653

3. Heat Exchange with Process Gas

3123525

4. Eliminate Heater5132722

JUDICIAL PHASE

IDEAADVANTAGESDISADVANTAGESRank

Electric HeaterEasy operationHigh Cost,

Difficult Maintenance

2

Steam JacketLow Cost, Safe, Easy

Maintenance

Difficult Operation

1

Heat Exchanging with Lube Oil

Low Cost, Easy Operation

Not Safe, Difficult Maintenance

3

Heat Exchanging with Process Gas

Low Cost, Easy Operation

Not Safe, Difficult Maintenance

4

Eliminate Heating

No CostNot Reliable,

Affect the turbine Performance

5

DEVELOPMENT PHASE

INTIAL COSTS, $

ELECTRICAL HEATER40,000

STEAM JACKET7,500

SAVINGS32,500

LIFE CYCLE COSTS, $

ELECTRICAL HEATER7,000

STEAM JACKET3,000

SAVINGS4,000

• Will be presented to the operation Manager.

• Decision will be taken by the Manager.

• Implementation will be done by Maintenance Division.

Presentation & Implementation