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Publication Title | MICROTURBINE OPERATING EXPERIENCE AT LANDFILLS

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MICROTURBINE OPERATING EXPERIENCE AT LANDFILLS 2003 SWANA LFG Symposium – Tampa, Florida

Andrew Wang Capstone Turbine Corporation Chatsworth, California

Benny Benson SCS Energy Long Beach, California

Ed Wheless

Sanitation Districts of Los Angeles County Whittier, California

ABSTRACT

Microturbines have been sold commercially in landfill and other biogas applications since early 2001. The following paper will discuss the early operating experiences using Capstone MicroTurbines in landfill gas projects, culminating in the technical and economic issues related to the successful development of the most recent 300 kW Capstone installation at Calabasas Landfill in Southern California.

INTRODUCTION

Capstone Turbine Corporation was the first to market microturbines commercially beginning in 1998, and has since sold and shipped more than 2,400 microturbine systems worldwide. Characteristics of Capstone MicroTurbines include:

• a low emissions profile with no post-combustion exhaust devices or chemicals;

• a single moving part;

• air bearings and air cooling;

• flexibility to use a wide range of fuels, including

flare gas with up to 7% H2S;

• optimized for 24x7 full-load operation;

• ability to follow electric demand load;

• unlimited grid-connected scalability

• built-in 2-20-unit grid-independent arraying with no

external hardware (up to 100 grid-independent units

with one minor networking hub);

• built-in power conditioning, synchronizing and

Direct2GridTM interconnectivity functionality and safety (UL-certified to 1741 and state-certified for direct grid interconnection in CA and NY).

These characteristics enable:

• energy cost control and grid power conservation at host sites

• NOx and greenhouse gas emissions control / reduction

• minor scheduled maintenance needs (primarily filter, injector, temp. sensor and ignitor [spark plug] cleaning or replacement once every 1 to 2 years, if operated 24x7)

• no gearbox, pumps or other mechanical subsystems that introduce maintenance and reliability issues

• no lubricants, coolants, other hazardous fluids, or even water

• ability to operate on liquid fuels as well as models to use a wide Btu range of gaseous fuels (350 – 2,600 Btu/scf).

To date, microturbines have been primarily placed into service as grid interconnected stationary power generators using natural gas fuel. Variations on the technology have resulted in liquid fuel utilization, grid- independent operation, hybrid electric vehicular applications, and medium-Btu1 flare gas utilization.

The following sections will detail the topics below:

• Early LFG Projects

• Calabasas Microturbine Project

• Newly Commissioned and Upcoming • Conclusions & Recommendations

1 350 – 700 Btu/scf HHV, Capstone Engineering Specification ES-0463

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