ASME PTC 4.4 FREE DOWNLOAD

All manually collected data should be made available to all parties to the test prior to leaving the test site. The total uncertainty of the average temperature is affected by the uncertainty of the individual measurements, the number of points used in the averaging process, the temperature gradients, and the time variation of the readings. The period rejected shall start immediately prior to the change and end no less than 10 min following the recovery of the criteria found in Table Some areas of caution are as follows: The duty associated with any stream injected into the gas stream such as augmenting air or atomizing steam must be calculated by multiplying the stream flow times the stream enthalpy. For heat inputs outside this range the user is referred to Nonmandatory Appendix F.

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For both cases, the damper installation will influence the results of performance testing.

(PDF) Gas Turbine Heat Recovery Steam Generators ASME PTC | Satriyo Baskoro -

The injection stream, bleed stream, and fuel flow and composition effects can be added to the inlet air stream so that the gas outlet flow and composition is also defined. Reheat steam flow can be determined by subtracting HP steam turbine gland losses from the HP turbine throttle steam flow.

Banister, Honorary Member, Consultant J. ASME Ptd are developed and maintained with the intent to represent the consensus of concerned interests. Egli, Alstom Power J. The thermowell must be located where the desuperheating water has thoroughly mixed with the steam. For all steam and water streams, flow, pressure, temperature, and quality shall be defined as required to asmme the change in energy of the stream.

Sometimes stream flows are not measured directly.

Asme Ptc - Gas Turbine Heat Recovery Steam Generators - Free Download PDF

The atmospheric pressure pptc the average gas pressure in the HRSG. Calculate the heating value contribution of each fuel gas compound by computing the product of the fuel gas compound mole fraction, the fuel gas compound molecular weight, and the fuel gas compound heat of combustion and dividing by the total fuel weight.

This code or standard pyc developed under procedures accredited as meeting the criteria for American National Standards. The process by which a psychrometer operates is not adiabatic saturation, but one of simultaneous heat and mass transfers from the wet-bulb sensing element. The systematic error is what remains after all reasonable attempts ltc eliminate it such as calibrating instruments have been made.

Flow elements need not be inspected following the test if the devices have not experienced steam blow or chemical cleaning. Users of this Code are free to adopt, modify, or reject any models for systematic error set forth in this Section, provided that the parties to the test agree to do so and agree on an appropriate substitute. The heating value for oil is to be determined by a bomb calorimeter test performed in accordance with ASTM D A less desirable alternative is to establish a flow by heat balance.

In general, all test instrumentation that is to be calibrated shall be calibrated against reference standards traceable to the National Institute of Standards and Technology NISTother recognized international standard organizations, or recognized physical constants. The gas molar pptc must also include the molar flow of steam or water injection into the GT. They include directions regarding instrument applications, limits and sources of error, range, sensitivity and random uncertainties, and methods adme calibration.

There are no specific requirements for the number of pc readings. ASTM E provides guidance on the selection of thermocouples. This section determines the mass fractions and molar flows of the air constituents entering the GT. Supporting data are historical calibration data that demonstrate a calibration drift less than the accuracy of the reference standard for the desired calibration period.

Asme Ptc 4.4 - Gas Turbine Heat Recovery Steam Generators

Gerhart, University of Evansville W. The spatial variation is estimated from the variation of the temperatures between measurement locations using the following equation: If a duct burner is in operation during a test, the change in composition and heat input is also taken 44. account. The thermowell has a bore extending to near the tip to facilitate the immersion of a temperature measurement device. Multiply the fuel oil flow by the carbon weight fraction in the fuel oil and divide by Column references are shown in brackets.

The steam flow to the desuperheater is taken as the feedwater flow. The parties to a test can use a pretest uncertainty analysis to assist in reaching many of the agreements required in Section 3.

Albert, Thermal Performance Services R. Unless the damper is periodically maintained and exposed to uniform temperatures, the potential for seal damage and frame and blade deformation exists. This will result in a higher than expected heat loss because minimum insulation thickness may control at the cold end of the HRSG. If there is a duct burner, go to Step 8.