Stopson Italiana will present the technological features of its soundproofing products in the world’s leading conference and exhibition for the European Power Generation industry
In its inaugural year as Electrify Europe, the re‑imagined event (previously “Power Gen”) will be dedicated to the convergence underway between the power generation and the transmission and distribution sectors, driven by digitalization, decarbonization, decentralization and electrification. For all those attending, Stopson Italiana will make available its technical expertise to support any demanding requirements to develop new sound-proofing and noise abatement solutions in the Power Industry.
Visit us at EE2018, Italian Pavilion – Hall A Booth R52
With the aim to attract over 11.000 delegates and attendees from more than 85 countries, Electrify Europe represents the industry’s premier conference and exhibition dedicated to the power generation, renewable and alternative energy and transmission and distribution industries. In this year of rebranding, the trade show has extended its conference program including keynote and plenary sessions addressing key issues affecting the sector. Among these: E‑mobility, Cybersecurity, AI, Blockchain, Demand Side Response and Energy Storage. Read full program here.
This year, Electrify Europe will address such topics as:
Transforming power economics & management
Advances in power generation technology
Operations & maintenance in a digital age
Sustainability & environmental protection
Energy storage & e-mobility
Intelligent infrastructure & cybersecurity
Empowering the customer
Distributed energy & systems
Since 1965 Stopson Italiana has been considered one of the largest provider of noise control solutions such as silencers, enclosures, vent equipment and test facilities for any industrial applications.
The Electrify Europe will take place on 3 days from Tuesday, 19 June to Thursday, 21 June 2018 in Wien and Stopson Italiana will be exhibiting at Hall A Booth R52 (Italian Pavilion)
How and what you need to know to soundproof properly your plant
Some basics about noise
Noise is commonly defined as unwanted sound. A typical noise control problem includes three basic components: the noise source (machines, fans, pumps, processes etc.), the receiver (persons subjected to the noise); and the path (the route the noise travels between the source and the receiver indoors or outdoors).
Noise can be classified in two different forms: airborne and structure-borne.
The first one goes from a source to a receiver as a differential in atmospheric pressure, traveling in all directions. Structure-borne instead is unwanted vibration, which is transmitted from a vibrating source to a receiver through a solid material and regenerated as airborne noise. Once the three main elements (source, path and receiver) have been identified, four ways can be adopted to control the noise: absorption, barriers (blocking), damping and vibration isolation.
Perhaps the greatest single contribution of unnecessary noise is the lack of proper maintenance and corresponding preventive maintenance intervals. Equipment that is poorly maintained eventually becomes inefficient. One manifestation of inefficiency is noise (misdirected energy), which, ultimately, becomes the subject of replacement. Typical energy wasters and noise producers are:
Steam leaks
Slipping belts
Worn bearings/gears
Improperly aligned belts
Unbalanced rotating parts
Reciprocating striking parts
Insufficiently lubricated parts
Contact between moving and stationary parts
Compressed air leaks
Vibrating sheet metal, such as streamlining
Improperly adjusted linkages or cams
How to choose the most appropriate Steam Vent Silencer provider
Which are the most relevant data to be considered in order to identify the correct roles within the supply chain of acoustic manufacturers. Understanding all of the factors involved could simplify the selection of the rightest vent silencer for the application required. But first, it’s important to introduce vent and blowdown silencers, reviewing the factors involved in predicting the noise generated by high-pressure vents.
Here below a list about the blowdown and vent applications that require silencers:
Steam venting in power generation applications
Process control and relief valves in industrial applications
Pipeline blowdowns and Natural Gas compressor station
Blowdown tanks and autoclaves
Bypass valves on blowers and compressors
Discharge of high-pressure gas to substantially lower pressure environment (atmosphere).
Steam ejectors and hogging vents
Vent Silencers and their applications
The terms “vent silencer” and “blowdown silencer” refer to the relative application for which each one is used. For both of them the design is similar, since we refer to vent silencers when being used to vent at a constant flow rate, for a period of time. The word silencer is instead referred to as blowdown, when they are blowing down a finite volume of gas starting at a high pressure, and ending at a low pressure over a given time. Vent silencers are sized for constant flow and blowdown silencers are sized for maximum flow.
Vent silencers find wide applications in high pressure vents, steam vents, safety relief valve outlets, system blow downs and purge outlets etc. Vent and blowdown noise is a function of upstream pressure and temperature, type of gas being vented, the valve size and type, plus the effect of downstream piping.
Stopson Italiana designs and manufactures high quality Vent Silencers that attenuate the high noise produced by the expansion of Gas, Steam or Air at elevated temperatures to atmospheric pressure.
When it’s required the installation of a Vent Silencer, here below all the data required in order to obtain a precise offer:
Application (Vent, Blow down, Relief)
Fluid Composition (Steam, Gas, Air)
Molecular Weight or Specific Gravity
Process conditions upstream of valve and units (lb/hr, SCFM, ACFM)
Temperature Pressure (P1)
Atmospheric pressure ( Pa ) / Temperature (T2)
Line size between valve and silencer
Line size from silencer discharge
Attenuation required (silencer performance)
Allowable pressure drop
Noise Generated by High-Pressure Vents
Over the years, there has been a good deal of work done in the field of predicting the noise generated by the high-pressure venting of gases.
Factors Influencing Noise Generated by High-Pressure Vents:
Mass flow – the higher the mass flow, the noisier it becomes.
The type of gas and its molecular weight/specific gravity – lighter gases are noisier.
Temperature – higher temperatures result in lighter gas flows, and therefore, higher noise levels.
Upstream versus downstream pressure – the higher the upstream pressure is relative to downstream pressure, the louder it will be.
Choke flow (critical flow or sonic flow) – occurs when upstream pressure is roughly two times or greater than downstream pressure, making things much noisier.
Orifice/opening size of valves, vents, orifice plates, diffusers, etc. – larger diameters result in low frequency noise, while smaller diameters produce higher frequency noise. For instance, diffusers create a shift in the noise spectrum from low frequency (one large vent opening) to high frequency (many smaller openings), which is much easier to attenuate.
Elements Creating Noise in High-Pressure Venting Systems
The noise at the end of a high-pressure vent pipe is a combination of the noise generated by the high-pressure-drop elements in the system. Essentially, any element that has a high-pressure drop across it or large change in area will create noise and should be included in the noise model to accurately predict overall noise level.
The major elements that create noise in high-pressure venting systems are:
Pressure relief and control values – present in virtually all venting systems.
Vent pipes/nozzles – last element in venting systems, except for those using high-pressure silencer diffusers.
High-pressure silencer diffusers – when included, usually designed to provide a specific backpressure at the rated flow (sometimes used as fail-safe device).
Orifice plates – included in many systems as a flow regulator or fail-safe device.
Enlargers (reducers), headers and abrupt transitions – included in pipe systems for various reasons. Shock Noise Versus Turbulent Mixing.
There are two phenomena that produce noise in a high-pressure venting system:
Shock noise – occurs when a choked flow condition exists
Turbulent mixing – caused by the ripping of the air as the vent gas decelerates to lower velocity, such as the atmosphere. Shock noise is the louder of the two. By adjusting the elements in a piping system it is possible to reduce the shock noise by reducing the magnitude or quantity of choked flow conditions present. Turbulent mixing, on the other hand, is always present, though less of an issue.
The Sound Vibration Control Magazine released a full report with all the specifications needed (listed in a Data Sheet) in order to proceed with the right purchase of a industrial silencer.
Industrial silencers: an increase of demand due to a more strict regulation for industries
An integral part of today’s industrial process and ventilation systems, industrial fans, blowers, and compressors are leading causes of noise problems. If unaddressed, these issues can lead to health and safety concerns, as well as environmental regulation violation. With the tightening of noise regulations, industrial facilities are required to stay in compliance with regulations. Industrial silencers are typical being used to attenuate noise coming from intake and exhaust systems of industrial facilities. These silencers may be built in limited space. Inside an industrial area, fan installation is one of the most predominant source.
Industrial silencers are engineered to control noise in specific applications, and can alleviate problems in work facilities. With more than 50 years of experience Stopson Italiana soundproofed plants in a broad range of installations, such as:
Fan Silencers
Duct Silencers
Blower Silencers
Sound Enclosures
Gas Turbine Engine Exhaust Silencers
Silencers are required for almost all installations that particularly include gas turbines and heat recovery steam generators. Our Gas Turbine Exhaust Silencers are especially designed to work in an environment where they are simultaneously exposed to high temperatures and to high velocity turbulent flow.
Stopson Italiana provides full custom engineered Inlet Exhaust Silencers for Gas Turbines, DG sets Turbo Compressors and Turbo Blowers. They entail complete solutions in the field of Machinery filtration and acoustic solutions for Gas turbines and compressors.
Stopson Italiana Gas Turbine Silencers provide the ideal solution to keep noise at a manageable level, while maintaining the operating efficiency of your turbine intake system.
Stopson Italiana designs and manufactures all types of discharge silencers in compliance with the international quality standards. Our discharge silencers are very much effective in reducing the noise for entire systems that receives air for heavy engines & turbine.
Stopson Italiana engineers have been designing application-specific products and services for industrial plants and processes since 1965. Each product manufactured is tested and inspected to meet all applicable industry standards in terms of quality, longevity and safety.
Stopson Italiana pioneers the acoustical market since 1965 with highly engineered, custom made and proven solutions to meet most demanding customers’ expectations worldwide.
With decades of experience in designing and manufacturing products, structures, test facilities and providing engineering support ...
Absorptive for cold and hot gases, reactive for engines or small boilers exhaust, combined absorptive and reactive for venting systems. Circular or rectangular shape, atmospheric or pressurized for any gas ...
Installation, commissioning and testing services to complement Stopson's sound-proofing solutions offering. Post-delivery assistance, acoustics surveys and measurements to make our support fully ...
Acoustic rooms and chambers for industrial equipment and aeronautical engine test purpose, semi-anechoic and anechoic chambers, control rooms. A solution for any sound control requirement in the ...
We reinvent ourselves every day while sticking to our principles and key values in designing available solutions to reduce noise pollution. Our aim is to anticipate tomorrow’s challenges to make a tangible improvement in quality of life and provide our contribution to a more sustainable environment.
ABOUT US
STOPSON ITALIANA was founded in 1965. Ever since it was set up, the company has pursued a philosophy of dealing with every aspect of sound-proofing, leveraging the multi-years experience from thousands of installations worldwide to increasingly become a reference point for people who want to undertake a really specific and definitive programme of noise pollution reduction.
In order to fully satisfy each specific need, STOPSON ITALIANA organized its corporate structure so that every activity would contribute towards maintaining a constant standard of product quality. A strict selection of cutting-edge materials and technologies...
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