How Industrial Silencers work in HVAC systems

Crucial factors to take in account when silencers have to be installed in HVAC plants.

One of the most frequent application of soundproofing technology (like Acoustic Louvers and Intake Silencers) encompasses definitely the installation on HVAC plants. These installations release sound emission into the environment, often exceeding the allowed thresholds.

That’s because of the noise created by airflow produced by motors or fan. In other cases, the sound waves tend to break out through the walls of the ductwork and spill out into a room. Often, the noise travels the length of the ductwork and spill out the mouth at the vent.

Acoustic EnclosuresAccording to their functions, these machines are arranged in outdoor places, like courtyards and terraces. Hence, the first step is to evaluate the area in which the HVAC systems should be set. That means an accurate mapping process of noise propagation, including ventilation of buildings, enclosures, and equipment rooms. Integration of noise control measures such as silencers and louvers, into the system design requires careful consideration of space constraints, fan selection and aerodynamic pressure losses.

The need is, one one hand, to reduce the noise generated by air or gas flow. On the other, to avoid of compromising the air or gas flow itself, with keeping the pressure drop as low as possible too. For these reason the Stopson Acoustic Louvers, Intake Silencers and Acoustic Enclosures can be considered suitable for these multiple industrial applications. The silencers can be added on the ventilation circuit and combined with the machine, in order to completely acoustically isolate it in any direction.

The HVAC silencers are an excellent choice for applications requiring maximum insertion loss (noise reduction), low static pressure drop, low maintenance, and quick delivery. Stopson’s offer encompasses the design and engineering assistance to integrate the HVAC system with its attenuators. Both ready-made silencers and custom built solutions are offered. The benefits are: durability, surface finishing, ease to operate.

C.O.R.U. Project Moscow

Stopson Italiana delivers Vent Silencers for Refinery and Petrochemical Projects in Russia

EAC certified vent silencers successfully supplied for Oil & Gas projects in Moscow and Kingisepp

Stopson Italiana has recently completed delivery of 10 silencers to be installed at Combined Oil Refinery Unit (CORU), in the Moscow Refinery and 9 vent silencers to be installed at the new Ammonia plant under construction in Kingisepp, Russia, according to the data below:

  • C.O.R.U. Project – no. 10 SPM and PSP vent silencers for the Combined Oil Refinery Unit, with flow rates from 0,4 to 46 t/h. Temperatures from 150 °C to 450 °C, noise levels 80 dB(A) @ 1 m.
  • Kingisepp Project – No. 9 SPM vent silencers for the Ammonia plant, i.e. Steam and CO2 with flow rates from 1 to 130 t/h. Temperatures from 110 °C to 515 °C, noise level 85-110 dB(A) @ 1 m.

9 SPM Vent Silencers Ammonia PlantAll silencers have engineered according to the highly demanding EPC and end user’s technical specifications. They have been manufactured in Italy in special materials, including stainless steel for internal components, and certified in accordance with EAC TR CU 010 standards for Russian market.

Stopson’s Vent Silencers can be installed downstream any device acting as a link between a container of pressurized gaseous fluid and the atmosphere. The vent silencer can also provide high or low back pressure relief for the system ensuring proper operation.

SPM Vent Silencers, used for higher flows and back pressure, are based on a combined reactive and absorptive principle for noise reduction. The gases expand to atmospheric pressure through a perforated diffuser, providing a first important step in attenuation. The flow evolves into a sound-absorbing lining section to further contribute to reach required noise residual level.

PSP Vent Silencers, used for lower flows and back-pressures, feature an expansion chamber upstream the final absorptive section with no diffuser at the inlet.

A special sound-proofed weather hood is finally heading flow and noise upward, while delivering an effective rain protection and drainage.

Vent silencers can be reactive, absorptive or combined type depending on applications and required attenuation, which can reach as much as 75 dB(A).

Typical Applications for vent silencers are:

  • Safety Valve (PSV)
  • Relief valve (PRV)
  • Control valve
  • Ejector
  • Start up valve
  • Snort-valve
  • Flash and Blow Down Tanks
Stopson Italiana at GasTech

Stopson Italiana exhibits at GasTech 2017 

After the attendance at Offshore Mediterranean Conference (Ravenna), Stopson Italiana is flying to Tokyo for GasTech 2017.

A continuous improvements in Manufacturing and a set of Soundproofing Solutions for Oil & Gas and Power Generation industries. The last technological innovation in Noise Control will be presented within GasTech, the world’s leading gas and LNG conference and exhibition. 

Gastech will be in its 29th edition and 45th year when it arrives at the Makuhari Messe Chiba in Tokyo, Japan from 4 to 7 April 2017. The event will be hosted by the Japan Gastech Consortium made up of Japan’s top 10 natural gas and LNG companies.

Connecting 22000 technical innovators with commercial experts, the conference will draw 2000 conference delegates while its B2B exhibition will provide a platform for over 500 international exhibitors. Its many features and dedicated business networking programmes will also gather over 250 C-level and ministerial VIPs, 150 senior leaders who champion workforce diversity, as well as 250 young energy professionals.

 

GasTech in numbers:

  • 25,000+ visitors
  • 600+ exhibitors
  • 8 country pavilions
  • 4 dedicated Exhibition Zones
  • 2 Product Showcase Theatres
  • dedicated networking zones

Online networking | features and attendees from all sectors | upstream / midstream / downstream

Offshore Mediterranean Conference 2017

Clean Energy and Environmental Sustainability: the OMC 2017 turns toward “green” policies

Trade show and scientific roundtables: the Offshore Mediterranean Conference will host more than 1,300 delegates and 650 international exhibitors

Rome – From transition to a low carbon economy, to the role of the Mediterranean as a gas hub.

To meet the growing demand for energy of the future (+ 30% to 2035) the representatives of the Mediterranean countries together with some of the highest levels of the oil & gas industry will meet within the International Offshore Mediterranean Conference (OMC), the biennial conference and trade show dedicated to the upstream operator that will be held in Ravenna, next March 29-31. The thirteenth edition of the OMC 2017, has been presented last week in the Ministry of Economic Development in Rome. The main focus of the opening session held by Minister Carlo Calenda (March 29, 10.30am) will be titled “Transition to a sustainable energy mix: the contribution of oil and gas“. The plenary conference will be also attended by the Ministers of Energy of Egypt, Iraq, Cyprus, Lebanon and Greece, together with Eni’s CEO, Claudio Descalzi, and Edison, Marc Benayoum.

This event will represent an important opportunity to compare the energy and climate policies of the Mediterranean countries. But also a workshop for summarizing the different contribution that the main players could give in in order to achieve sustainability’ objectives“.

In this regard – argued General Director for Environmental Safety Activities’ mineral and energy of Mise, Franco TerlizzeseItaly is finalizing the update of the climate and energy strategy, which will result within the “SEN” (National Energetic Strategy) in 2017, as a tool to define primary action and manage the key role of the energy sector in the context of sustainable growth. All these components will take into account the European objectives of the Clean Energy Package, aiming to sight targets always more challenging“.

The Offshore Mediterranean Conference and Exhibition, the main showcase oil and gas in the Mediterranean basin, which will see the participation of over 1,300 delegates, representatives of producer countries not only in the Mediterranean but also Sub-Saharan Africa and the Middle East. Within a ​​30 thousand square meters area will be hosted 650 exhibitors from 30 countries, the presence of all the major European oil company of North Africa and Middle East.

Started in 1993 as a regional event, in its more than 20 years of activity OMC has experienced a remarkable growth in terms of attendance figures, exhibiting companies and conference quality, achieving an international status. It is now worldwide recognized as a key event within the Oil & Gas sector, the Offshore Industry and the related services.

 

Main topics:

 

  • Drilling and Completions
  • Exploration & Production
  • Marine Equipment & Services
  • Reservoir Description and Dynamic
  • Platforms (Fixed & Floating)
  • Safety, Environmental Protection & Regulatory Services
  • Management & Information Technology
  • Pumps & Compressors
  • Power Supply
  • Tubulars & Piping
  • Valves & Actuators
  • Process Equipment &Services
  • Corrosion & Control
  • Transportation & Communication

 

Technology Keywords:

  • 02002 Industrial Manufacture
  • 02003 Process control and logistics
  • 02004 Plant Design and Maintenance
  • 02007 Materials Technology
  • 03002 Process Plant Engineering
  • 03008 Mining Technologies
  • 10002 Environment Market Keywords
  • 06001 Oil and Gas Exploration and Production
  • 06004 Enhanced Oil Recovery (EOI)
  • 06007 Other Energy
  • 08001 Chemicals and Materials
  • 08002 Industrial Automation
  • 08004 Pollution and Recycling Related

 

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Stopson Italiana exhibits at OMC 2017

Stopson Italiana will launch 2017 exhibition program with Offshore Mediterranean Conference 2017 in Ravenna next week, presenting the technological excellence of its products and services for the Oil & Gas Industry.

 

Next OMC 2017 will address the theme of transition: the Paris Cop 21 Agreement and the recent decline in oil prices promise to reshape the Oil & Gas Industry.

Over three days a wealth of industry professionals and decision makers will share ideas, new research and innovation, highlighting how the oil & gas industry can and must contribute to a sustainable future.

The recent huge gas discoveries in the Mediterranean confirm once more its role as a natural energy hub, capable of channelling  the energy flows from Africa  to the European continent.

For all those attending, Stopson Italiana will make available its technical expertise to support any demanding requirements to develop new sound-proofing solutions in the Oil & Gas Industry.

Visit us at OMC2017, Hall 3 booth N24!

OMC 2017 Floor Plan Updated

CLICK HERE
TO DOWNLOAD YOUR FREE PASS!

In more than 22 years since being launched, each OMC edition was a record-breaking one, and the last event in March 2015 has been the biggest and best ever held.

With trend-bucking increases in both visitors and exhibitors number – 688 companies from 33 countries – OMC also welcomed more than 18,900 visitors from 69 countries worldwide.

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.
Offshore Mediterranean Conference 2017, will take place in Ravenna, Italy, March 29-31. Stopson Italiana will be exhibiting at Booth 3N24.

 

Gastech 2017

Stopson Italiana will exhibit at OMC 2017 and Gastech 2017

Two among the largest International Trade Show for Oil & Gas industry
Stopson will present its products of technological excellence within the Offshore Mediterranean Exhibition & Conference (Ravenna, IT), and Gastech (Tokyo). Two events that will bring together hundreds of companies and organizations from worldwide.
For all those attending, Stopson Italiana will make available its technical expertise to support any demanding requirements to develop new sound-proofing solutions in the Power Generation Industry and Oil & Gas.

Offshore Mediterranean Conference (OMC)
29-31 March 2017 | Ravenna ITALY

Gastech 2017
4-7 April 2017 | Chiba-Tokyo

ExxonMobil Singapore

ExxonMobil keeps expanding Singapore

A new refinery for blended lubricants to meet lower emission and raise fuel economy

Last February 16th, ExxonMobil Corp. has announced the expansion of its Singapore refinery to support the production of the company’s EHC™ Group II base stocks.

The aim is to develop the global supply of these products, enhancing the Singapore facility’s competitiveness. In facts, the project has been meant to enable customers “to blend lubricants that satisfy more-stringent specifications, help reduce emissions, and improve fuel economy and low-temperature performance“, ExxonMobil said.

On the other hand, Reuters published last week an announcement that a carbon tax on direct emitters is to be introduced from 2019. A strong signal that places Singapore – Asia’s main oil trading hub – in the way to moving towards a longer-term future dominated by cleaner technology and resources.

The ExxonMobil’s EHC product line has been designed to maximize the performance of all major automotive engine oil grades and to enhance the performance of finished lubricants used in multiple industries.

This expansion project represents the latest in a series of recent ExxonMobil investments in base stock production, including a previous expansion of capacity at the Singapore refinery in 2014, a recently-commissioned project at the company’s major integrated facility in Baytown, Texas, and introduction of Group II base stocks into European markets ahead of the anticipated completion of the new Rotterdam hydrocracker unit in 2018.

ExxonMobil released that a cogeneration project has started to improve energy efficiency and reduce emissions at the Singapore refinery. Construction is expected to begin during the second quarter of 2017 with completion anticipated in 2019.

How to Provide an Efficient Noise Propagation Control’s Infrastructure (ISO 11690-2)

The need for the companies to adopt a solid noise control policy has been widely covered in a recent article.

Regarding the control of the noise during its propagation – from the source to the receiver (generally the worker) – some or all of the following actions need to be considered meticulously, in order to set-up the most appropriate infrastructure within the plant:

  • Use of vent silencers (for valves and tanks), designed to reduce noise level of exhaust piping to the atmosphere for pressurized gaseous fluids.
  • Use of acoustic barriers (single walls), partial enclosures or full enclosure of the entire item of equipment.
  • Use of enclosures for noisy components on a machine.
  • Use of reactive or dissipative mufflers; the former for low frequency noise or small exhausts, the latter for high frequencies or large diameter exhaust outlets.
  • Use of in-line plenum chambers or lined ducts for air handling systems
  • Reverberation control – the addition of sound absorbing material to reverberant spaces to reduce reflected noise fields. Note that care should be taken when deciding upon this form of noise control, as direct sound arriving at the receiver will not be affected. Experience shows that it is extremely unusual to achieve noise reductions in excess of 3 or 4 dB(A) using this form of control which can be exorbitantly expensive when large spaces or factories are involved. In flat rooms the spatial sound distribution is of interest, see ISO 11690-1,-2.
  • Active noise control, which involves reflection, suppression or absorption of the noise radiated by an existing sound source by use of one or more secondary or control sources.

The commitment starts with a detailed analysis in order to ensure proper noise control measures for the facility design process. Three necessary steps in raw are accurately executed:

  • Field assessments Interpretation
  • Risks Mitigation
  • Reduction of noise control’s costs

All the analysis performed on noise and vibration problems are accomplished taking in account of noise control optimization’ costs, risk management from facility noise, complaints and regulatory compliance challenges.

The fully customized solutions realized by Stopson Italiana cover Oil and Gas, Power Generation, Marine and other industriesThe long-time maintenance assessments and long-term monitoring services are adopted to ensure full compliance over time.

Stopson Italiana is one of the Italian leading provider of innovative sound control solutions, noise impact model design and prediction.

In order to expand its staff, Stopson has recently open five new job positions in the following areas: Design Engineering, Project Engineering, Sales Engineer, and Quality Assurance-Control (QA-QC).
See more on Stopson Italiana CAREER Section.

Trump

Oil and Gas 360: the Trump ‘side effect’

From the stocks’ uncertainty to the pipeline’s manufacturing reestablishment: the new elected 45th US President keeps pushing to boost gas and oil outputs

“Making America ‘Crude’ Again”. This the buyword resounding like a commercial – and spotted by the newspaper – after the last new elected 45th US President Donald Trump’s speeches. How the Trump’s policy could affect the oil and gas market is still undoubtedly hard to sentence. However, barely hours after Trump had taken office, a revised White House website has declared its new found pro energy industry credentials.
That’s the way on which – after three days into his presidency – Trump gave his explicit backing to two controversial pipeline projects: Dakota Access and Keystone XL, providing American steel for their construction.

Nevertheless the presidency of Donald Trump, who made promises on the campaign trail to boost US oil and gas output and roll back regulations unfriendly to industry, is expected to be a stark policy departure from President Barack Obama, who spent much of his political capital over the past four years pushing efforts to combat climate change.

Furthermore, Trump reiterated his creed that pipeline makers use U.S. materials when they build projects in the United States, another sign that he will keep pressure on companies in the middle of the energy sector.

Crossing the boundaries, Mexican gasoline market reforms could influence U.S. gasoline export trends. In facts, the government is in the process of opening its gasoline and diesel markets to outside competition and replacing government-set prices with market-based prices. Last year, Mexico began allowing entities other than the state-owned company Petróleos Mexicanos (Pemex) to import gasoline and diesel and open retail stations. These changes followed previous energy sector reforms that ended Pemex’s upstream monopoly and opened the oil and natural gas sectors to foreign direct investment. Although Mexico is a large crude oil producer, it relies heavily on imports of gasoline from the United States to meet domestic demand. Therefore, the outcome of gasoline market reforms in Mexico may have significant implications for the sale of U.S.-produced gasoline.

The volume of gasoline trade between Mexico and the United States is significant to U.S. refineries. Over the past five years, U.S. exports to Mexico accounted for between 44% (2014) and 54% (first 10 months of 2016) of total U.S. gasoline exports. On a year-over-year basis, U.S. gasoline exports to Mexico increased by 71,000 b/d in 2015, with additional average growth of 75,000 b/d over the first 10 months of 2016, when U.S. exports to Mexico averaged nearly 390,000 b/d.

Based on projections in EIA’s January 2017 Short-Term Energy Outlook (STEO), natural gas prices are expected to increase in both 2017 and 2018. Rising natural gas prices could lead developers to postpone or cancel some of the upcoming power plant additions. Construction timelines for these plants are relatively short: more than half of the natural gas-fired generating capacity scheduled to come online in 2017 and 2018 was not yet under construction as of October 2016.
Stock and trading
On the New York Mercantile Exchange, light, sweet crude futures CLH7, +1.43% traded at $52.43 a barrel, down 20 cents, or 0.4%, in the Globex electronic session. Brent crude LCOH7, +1.05% on London’s ICE Futures exchange fell 9 cents to $55.14 a barrel. U.S. oil production now stands at 8.96 million barrels a day, according to the U.S. Energy Information Administration.

According to a BMI Research report, North America, the Middle East and parts of Asia will lead the recovery in oil and gas spending over 2017. The reports told that spending on oil and gas in North America is expected to raise by more than 17% this year.

inline silencer

In-line silencers for compression skid successfully tested

Hydrostatic Test of AISI316L pressurized silencers for screw compressor completed last week.

Stopson Italiana has recently fulfilled the supply of stainless steel in-line silencers to be installed at 1st and 2nd stage of a screw compression skid for offshore installation. With an operating pressure between 1.7 and 8.7 barg and a design pressure of 11 barg, the two silencers have been hydrostatically tested up to 22 barg. Operating temperatures vary in the 180-240 °C range.

hydrostatic testSTOPSON in-line silencers are designed according to ASME VIII Div. 1 and PED certified to match various applications even requiring small, compact construction with high acoustic performance. With special materials suitable for sound absorbing in a pressurized environment, they allow higher velocities since those materials are not directly exposed to the flow, thus maintaining higher initial acoustic performance.

According to the required design pressure, an accurate calculation of the actual fluid density allows proper internal sizing, to avoid the risk of losing soundproofing materials into the flow.
Our design criteria can match the most stringent requirement in terms of thermodynamic conditions, materials and size, thus making STOPSON’s In-line silencer a state-of-the-art solutions for a large number of onshore and offshore installations.