Analysis of noise sources roof boiler plants

Roof Tunnel Stability by Wedge Analysis

A jointed rock mass presents a more complex design problem than the other rock masses. The complexity arises from the number (greater than two) of joint sets which define the degree of discontinuity of medium.  The condition that arises in these types of rock masses is the generation of discrete rock blocks, of various geometries. They defined by the natural fracture surfaces and the excavation...

Improving Air-Conditioners’ Energy Efficiency Using Green Roof Plants

Methods for the Analysis of Boiler Water

Recommendations for Boilers up to 250 psig Ca 0.40 2.50 Na. 0.46 2.17 CaO. 0.56 1. 79 NaOH. 0.80 1. 25 Ca(HC031. . 1. 62 0.617 Na 2C03 1. 06 0.943 CaSO. 1. 36 0.735 NaHC03 1. 68 0.60 CaCl2 1.11 0.901 Na 2SO•. 1.42 0.704 Mg . 0.24 4.17 NaCI 1.17 0.855 MgO 0.40 2.48 CO2 , 0.44 2.27 MgC03 • 0.84 1.19 C03 0.60 1. 67 Mg(HC03) 2 ' 1. 46 0.685 HC03 1. 22 0.82 MgSO•. 1. 20 0.833 SO•. 0.96 1.04 MgCl2 0....

Understanding Slat Noise Sources

Model-scale aeroacoustic tests of large civil transports point to the leading-edge slat as a dominant high-lift noise source in the lowto mid-frequencies during aircraft approach and landing. Using generic multi-element high-lift models, complementary experimental and numerical tests were carefully planned and executed at NASA in order to isolate slat noise sources and the underlying noise gene...

Diagnostics of noise acoustic sources

The diagnostics of the noise acoustical sources from near-field data is considered. The algorithms allowing the determination of the equivalent elementary source distribution along a radiator and the far-field reconstruction from near-field measurements are presented. Some components of the total reconstruction error are analyzed.