The Importance of Noise Modeling Software for Industrial Plants

An industrial plant’s acoustical footprint can be a dynamic and complicated environment. For gas power plants, in particular, a complex list of noise sources needs to be considered. For a combined cycle power plant, there are major noise sources from prime movers like the gas turbine itself, but there are many other noise sources, from the steam generation process to other balance of plant ancillary equipment.

A typical list of noise sources from a combined cycle gas turbine power plant includes:

• air-cooled condenser (ACC) or cooling tower
• steam turbine generator (STG)
• combustion inlet filter house
• exhaust stack
• heat recovery steam generator (HRSG)
• high-pressure steam piping
• the condenser is a major noise producer, with steam bypassing the STG
• balance-of-plant (BOP) equipment like ammonia injection systems, cooling fans, transformers

SVI BREMCO utilizes SoundPLAN software to analyze how the noise sources from a power plant influence the surrounding environment in the near field and far field. The near field can be analyzed for personnel protection, and the far field can be analyzed for impacts outside the plant boundaries to a community or residential areas.

What is SoundPLAN?

SoundPLAN is an environmental noise modeling and analysis software designed to comprehensively assess power plant noise emissions. Utilizing ISO, ASTM, and industry-standard algorithms, it simulates and visualizes noise impact, particularly near-field noise behavior. By creating a baseline model that incorporates predicted acoustic properties of both primary and secondary sources, SoundPLAN visually displays noise propagation patterns in both two and three dimensions. The software produces results that include color contours of acoustic response at a defined perimeter, analyses of alternative concepts, and comparative data to guide the selection of final mechanical equipment characteristics.

What Are the Key Features of SoundPLAN Software?

The features of SoundPLAN vary based on the plan you use. The following features are highlights from the SoundPLANnoise option:

Noise Propagation Modeling: SoundPLAN, used by acoustical consulting firms for complex soundscape analysis, accurately models noise propagation from various power plant sources. It considers factors like source geometries, radiating surfaces, directivity, topography, atmospheric conditions, and ground characteristics to simulate noise travel and predict noise levels at specific locations.

Source Characteristics Integration: SoundPLAN allows detailed input of the power plant’s equipment and operations, including geometric and acoustic properties for components like the M501JAC exhaust system, tempering air system, and ammonia flow control skid (AFCU). It accounts for changes in power plant schedules and displays turbine performance, focusing on single-unit operation at maximum sound power and flow conditions.

Regulatory Compliance: SoundPLAN helps ensure compliance with noise regulations by assessing whether power plant noise emissions meet local, regional, and national standards or project criteria. It compares predicted sound pressure levels against defined noise limits or previously surveyed data.

Community Noise Impact Assessment: SoundPLAN evaluates the current impact of power plant noise on the surrounding area and the effects of proposed improvements. It produces visual color contours showing how noise spreads from the plant in three dimensions, making it easy to display overall or frequency-specific sound pressure levels.

Scenario Analysis: Power plants have multiple operational scenarios for primary (combustion turbine, generator) and secondary (tempering air, AFCU, fuel yard, compressor station, valving, venting, etc.) equipment. SoundPLAN allows users to conduct and save individual scenario analyses, identifying improvements or declines in soundscape performance.

Reporting and Documentation: SoundPLAN offers comprehensive reporting tools, generating detailed illustrations and numerical data. These outputs are useful for explaining results in reports to regulatory agencies or customers in the power generation industry.

Why Use a Noise Modeling Tool Like SoundPLAN?

Using a noise modeling tool is essential for managing and mitigating noise emissions in various environments, including industrial plants. These tools offer benefits like accurate analysis, compliance with regulations, and improved community relations. Here are several key reasons why incorporating a noise modeling tool into plant operations is beneficial:

• Environmental impact assessments often require detailed noise level analyses to predict the plant’s impact on nearby communities and wildlife.
• Noise regulations and standards, which vary by region, aim to limit exposure to harmful noise levels.
• Accurate noise modeling and prediction ensure compliance with these regulations.
• Identifying noise hotspots and high-emission sources within the plant allows for targeted mitigation efforts.
• Noise modeling tools can simulate the effects of various noise control measures, such as barriers, silencers, and operational changes, aiding in the design of effective noise reduction strategies.
• Minimizing noise pollution is essential for maintaining good relationships with nearby communities.
• Using tools like SoundPLAN to predict and mitigate noise enables power plants to address potential complaints proactively and demonstrate their commitment to environmental stewardship.
• Noise modeling can assist in the planning stages of a power plant, helping determine the optimal layout and positioning of noisy equipment to minimize noise impact.
• During operation, it can be used to schedule maintenance activities and other operational changes to minimize noise disturbance.
• Excessive noise can harm the health and safety of plant workers.
• Noise modeling helps design a safer working environment by identifying high noise exposure areas and recommending appropriate protective measures.

Do You Need Help with Custom-Engineered Industrial Noise Control Solutions?

SVI BREMCO offers industrial noise control modeling, planning, noise surveys, silencer inspections, and plant and/or equipment noise control design support. Contact the engineers at SVI-BREMCO today to discuss options for your site.