Development of Noise Prediction Program for HRSG

HRSG 소음예측 프로그램 개발

It is usually the contractual responsibility of HRSG(Heat Recovery Steam Generator) supplier to limit combustion turbine exhaust noise at cogeneration sites. Thus, it is necessary to predict the noise level from HRSG at the stage of preliminary design. HRSG is usually composed of inlet duct, main casing, outlet duct, stack. To satisfy the noise limit level, additional equipments are sometimes required - duct shroud, silencer. We develop algorithms for predicting the noise emission from all these equipments of HRSG units. For the convenience of user, we develop the GUI window version program, named NP-HRSG program. To evaluate the accuracy of this program, predicted noise levels from a real HRSG model are compared with measured data. Through this comparison, we observe that the maximum error is just about 3dB.