application of asme ptcs to geothermal perf testing (oct 2010)

8/18/2019 Application of ASME PTCs to Geothermal Perf Testing (Oct 2010)

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The Geothermal Potential

• Significant role in the world’s electricity needs

• Japan’s National Institute of Advanced Industrial Science and

Technology (AIST) estimates capacity at 30 million kilowatts

(kW)2

• U.S. Geological Survey (USGS) estimates the potential capacity

to produce between 8,000-73,000 MW (mean of 33,000 MW)

across 13 western states3

• The U.S. already has more geothermal capacity than any other

country1

• 3,000 MW in 9 states alone!!!1


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The Geothermal Potential

(cont.)

• One of the few renewable energy technologies that can

supply continuous, baseload power on a level that is desiredby the current power market

• Costs for electricity from geothermal facilities are declining to

a level that is competitive with new conventional fossil fuel-

fired power plants4

• Now the BIG question


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What can we do to help geothermal

electricity take its rightful place in

the power market and beconsidered a key element of the

U.S. energy infrastructure???

•

Geothermal energy must be established in allareas as with traditional forms of energy.

• One of those areas is:

• The ASME Performance Test Codes (PTCs)


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ASME Performance Test Codes

• ASME - American Society of Mechanical Engineers

• ASME’s mission: – “To promote and enhance the technical competency and

professional well-being of our members, and through

quality programs and activities in mechanical engineering,

better enable its practitioners to contribute to the well-being of humankind…”


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ASME Performance Test Codes

(cont.)

• Codes and Standards mission:

– “Develop the preeminent, universal acceptable codes,standards, conformity assessment programs, and related

products and services for the benefit of humanity. Involve

the best and brightest people from around the world to

develop, maintain, promote and employ ASME productsand services globally.”


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ASME PTCs Purpose

• Provide uniform rules and procedures to the power industry for planning,

preparing, and executing performance tests and reporting the results.

• What is a performance test?

– An engineering evaluation where measurements are taken on key

parameters to feed calculations, whose results indicate how well the

performance of the specified equipment compares to an established

design criteria.

• PTCs serve as standards for parties entering into commercial agreements

on the purchase of power equipment or plants so that each party has a

solid foundation on which to make sure that the commercial obligation

surrounding the expected performance is met.


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• Power industry benefits by having a set of standards to

help evaluate equipment and overall plant performance

by setting all technologies associated on an equal basis

ASME PTCs – Why are they so

doggone important?


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Uses of ASME PTCs

Who, What, When, Where, and Why

• WHO uses ASME PTCs

– Equipment Suppliers

– Equipment Owners

– Architect/Engineering Companies

– Engineering Personnel

• WHAT are the uses of ASME PTCs

– Determination if equipment meets design or expected performance criteria

– Incorporation by reference into contracts to serve as a means to determine fulfillment of

guarantees

– Evaluation of equipment performance following modification, change in operating

conditions, or any suspected change in performance for which such investigation is required.

– Studies to help determine the value of possible upgrades or modifications to equipment

– Benchmarking of equipment performance, sometimes to help determine necessity for

specific preventative maintenance or possible upgrade or modification

– Validation of results from online or continuous performance monitoring systems, which are

usually less accurate than results conducted in accordance with PTCs5


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Uses of ASME PTC’s, cont’d

• WHEN to use ASME PTCs

– Acquiring new equipment

– Modifying existing equipment

– Benchmarking existing equipment

•WHERE to use ASME PTCs – Power Plants New and Existing

– Refineries

– Other industrial facilities (using process steam etc.)

– Manufacturing

•

WHY use ASME PTCs – Evaluate equipment

– Target high priority maintenance or capital items

– Evaluate the economic dispatch of a unit

– Optimize operation

– Understand design margin and the impacts of manufacturing tolerances on performance


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Codes that can be applied to

Geothermal Power Plants

• EQUIPMENT CODES

– PTC 6, Steam Turbines

– PTC 8.2, Centrifugal Pumps

– PTC 12.2, Steam Surface Condensers

– PTC 12.4, Moisture Separator Reheaters

– PTC 12.5, Single Phase Heat Exchangers

– PTC 19.11, Steam and Water Sampling,

Conditioning, and Analysis in the Power Cycle

– PTC 19.23, Model Testing

– PTC 23, Atmospheric Water Cooling Equipment

– PTC 24, Ejectors

– PTC 25, Pressure Relief Devices

– PTC 29, Speed-Governing Systems for HydraulicTurbine Generator Units

– PTC 30, Air-Cooled Heat Exchangers

– PTC 39, Steam Traps

– PTC 46, Overall Plant Performance

– PTC PM, Performance Monitoring Guidelines for

Steam Power Plants

• GENERAL DOCUMENTS

– PTC 1, General Instructions

– PTC 2, Definitions and Values

– PTC 19.1, Test Uncertainty

– PTC 19.2, Pressure Measurement

– PTC 19.22, Digital Systems Techniques

– PTC 19.25, Transient Measurement Uncertainty

– PTC 19.3, Temperature Measurement

– PTC 19.5, Flow Measurement

– PTC 19.6, Electrical Power Measurement

– PTC 19.7, Measurement of Shaft Power

– PTC 36, Measurement of Industrial Sound

– PTC 60, Validation and Verification of

Computational Solid Mechanics

– PTC 61, Validation and Verification of

Computational Fluid Dynamics and Heat Transfer


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ASME PTC 46

• Start using it now!

• Can be applied to any type of power plant even though there

are not specific examples for all types.

• Use PTC 46 as a guideline for overall plant testing. Identifying

test boundaries, measurement locations, and calculation

methodology.


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ASME PTC 6

• Uses a correction for HP Steam Pressure. Geothermal power

plant correction needs to be for HP Steam Flow.

• PTC 6.2 (Steam Turbines in Combined Cycles) has a correction

methodology that uses HP Steam Flow.

• Current implementation for the correction method used in

Geothermal Steam Turbines can be a combination of the 6

and 6.2 Performance Test Codes.


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Geothermal Industry Benefit from

ASME PTCs

• Increase in reliable geothermal technologies.

• Standardize the industries measurements, calculations, and reporting

practices for Geothermal Power Plant Performance Testing.

• Standardize manufacturing and construction.

• Dry and Flash steam geothermal plants can be covered under the specified

PTCs within this presentation with minor to no modifications.

• Binary cycle geothermal technology is not covered well if at all by the

current ASME PTCs. This is where a specific PTC for Geothermal would

make a huge impact to the industry.

• Manufacturing practices will have to adhere to strict guidelines in order to

fulfill performance requirements of the PTCs.

• Contracts will have a firm foundation on how obligations therein can be

demonstrated.


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ASME PTC 52

• The Solar Industry is a renewable power source that has already begun its

involvement with the ASME PTCs

• A committee is in place working on the ASME PTC 52 code for

Concentrating Solar Power Plants


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Conclusions

• WIN – Geothermal Industry will gain standardization

• WIN – Owners will gain a means to consistently evaluate assets

• WIN – Financial organizations will have a means to gauge risk

• WIN – ASME PTCs will provide new technological knowledge to the

industry with regards to proper testing techniques associated with

Geothermal Power Plants

• With standardization, knowledge, and experience will come reliability,

repeatability, and accountability in all areas of the Geothermal Industry.

And with those, we will have a viable source of renewable energy that can

be used for dependable power generation.


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QUESTIONS ?

Thank you very much for your time.

application of asme ptcs to geothermal perf testing (oct 2010)

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