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Content DescriptionThis Code provides procedures for conducting performance tests of air heaters to determine: exit gas temperature; air to gas leakage; fluid pressure losses; and other fluid temperatures. It also provides procedures to determine the heat capacity ratio (X-ratio and any or all of the performances results specified above that may be necessary for: checking actual performance against standard or design performance; comparing changes in performance over time with standard or design performance; comparing performance under various operating conditions; and determining the effect of changes in equipment. This Code applies to all air heaters used in industrial application, e.g., air heaters servicing steam generators and industrial furnaces. This specifically includes: combustion gas-to-air heat exchanger including air heaters with multi-section air streams; and air preheater coils utilizing noncondensing (single phase steam, water or other hot fluids. This Code does not cover direct-fired air heaters or gas-to-gas heat exchangers. In the latter application, this Code may be used to determine both the thermal and pressure drop performance, while alternate methods of leakage measurement should be agreed upon between the parties. This Code also does not cover heat exchangers where the heating fluid is condensed while passing through the heater. Air heaters in parallel shall be tested individually (wherever possible for purposes of checking actual performance. This Code requires pretest and post-test uncertainty analysis. The pretest uncertainty analysis is required in order to effectively plan the test. It allows corrective action to be taken prior to the test, either to decrease the uncertainty to a level consistent with the agreed-upon uncertainty, or to reduce the cost of the test while still attaining the objective. The post-test uncertainty analysis is used to determine the uncertainty intervals of the actual test. This analysis should confirm the pretest systematic and random uncertainty estimates. It serves to either validate the quality of the test results or to expose problems.Subscription InformationMADCAD.com ASME Standards subscriptions are annual and access is single concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office locations & multiple concurrencies on ASME Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASMEASME is a not-for-profit membership organization that enables collaboration, knowledge sharing, career enrichment, and skills development across all engineering disciplines, toward a goal of helping the global engineering community develop solutions to benefit lives and livelihoods. Founded in 1880 by a small group of leading industrialists, ASME has grown through the decades to include more than 130,000 members in 158 countries. Thirty-thousand of these members are students. From college students and early-career engineers to project managers, corporate executives, researchers and academic leaders, ASME's members are as diverse as the engineering community itself. ASME serves this wide-ranging technical community through quality programs in continuing education, training and professional development, codes and standards, research, conferences and publications, government relations and other forms of outreach. |
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