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Research Reports

Management plan for minimizing the noise impact in residential areas around the combined heat and power plant
  • Author Park, Youngmin
  • Researchers
  • Date 2020-10-31
Ⅰ. Background and Aims of Research
1. Background
o Social issues
ㅇ Concerns about urban noise pollution associated with collective energy supply
- Noise complaints related to turbine operation and capacity expansion of combined heat and power equipment
ㅇ Noise damage due to expansion of installation promotion of combined heat and power facilities near demand areas

o Necessity of the research
ㅇ Setting a policy agenda: solving the problem of residential noise near cogeneration facilities
ㅇ Concerns about underestimation when assessing the noise environmental impact of the surrounding residential area
ㅇ Necessary to strengthen management measures for the noise effect during the operation of a cogeneration facility

2. Research objectives
o To improve the prediction and evaluation method for the noise effect in the surrounding quiet area
ㅇ Used when predicting and evaluating the noise impact of energy power generation facilities subject to environmental impact assessment

o To present a draft noise management policy for the operation of a combined heat and power facility
ㅇ Used for post-environmental impact assessment and noise monitoring

3. Research target and content
o Research target
ㅇ Newly constructed and pre-existing urban combined heat and power plants

o Main research content
ㅇ Survey on the current state of noise management policies for domestic and overseas cogeneration facilities (Chapter 2)
ㅇ Noise survey and the diagnosis of the problems (Chapter 3)
ㅇ Solving the noise problem associated with the urban combined heat and power plants and proposing feasible policy measures (Chapter 4)

Ⅱ. Survey on the Current State of Noise Management Policies for Combined Heat and Power Facilities in Korea and Other Countries
1. Domestic status (in Korea)
o (Environmental Impact Assessment Act, Article 22) Environmental impact assessment of energy source development projects
ㅇForecasting the noise effects associated with the operation of the cogeneration facility and evaluating the reduction plan
ㅇ Necessary to set the target standards for noise management in the quiet area during operation
- Standards for the control of living noise (other business establishments) under the Noise and Vibration Control Act
-Environmental (Noise) standards under the Framework Act on Environmental Policy

o(Environmental Impact Assessment Act, Article 36) Post-construction environmental impact survey
ㅇ Survey of noise impacts on the adjacent quiet area and implementation status of reduction measures, etc.

2. International cases of the industrial noise management policy
o European Union, Assessment and Management of Environmental Noise (EU, 2002)
o UK, The Control of Noise at Work Regulations (2005)
ㅇ Minimization of health risks through the control of noise workers exposed to (noise level at the point that is 1m away), daily or weekly / personal
- lower noise exposure action value: 80 dB(A)
o Noise risk assessment on workers’ health
- upper noise exposure action value: 85 dB(A)
o The level that accords with the target noise level in noise reduction measures for cogeneration plants in Korea
- Noise exposure limit value: 87 dB(A)

o Australia, Noise Policy for Industry (NSW EPA, 2017)
ㅇ Project intrusiveness noise level
- The level of noise from source, measured over a 15-minute period, should not exceed the background noise level by more than 5 dB
o Background noise (Rating Background Level) + 5dB or less
- Seeks to limit the degree of the change a new noise source introduces to the existing environment
ㅇ Amenity noise level
- Maintaining the appropriate noise level for each city
o Regulation of the acceptable noise level for each land use area

Ⅲ.oSurvey of the Noise Effects and the Diagnosis of the Problems
1. Current status of environmental noise impact assessment for combined heat and power plants and the diagnosis of the major problems
o Current state of the designed noise level and problems during operation
ㅇ Apply to similar cases collectively when setting the noise source in power plants

o Current status and problems of predicting the noise effects in adjacent areas during operation
ㅇ (Securing noise data) Securing noise data from noise-generating facilities when predicting the noise impacts
ㅇ (Setting the target noise standard) Include management guidelines for low-frequency noise

ㅇ (Prediction of noise effects) Predict noise effects at points a certain distance away
ㅇ (Examination for measures to reduce noise effects)
- Whether or not the acceptance limit in the surrounding quiet area is exceeded
- Review the appropriateness of the reduction measures

2. Analysis of major noise sources and application examples of noise reduction measures through examination of complaint cases
o Power plant chimney noise (Stack noise)
o Cooling tower noise
o General noise reduction measures and related application case studies
ㅇ Noise source / Path / Receiver
ㅇ Establishment of noise reduction measures and actual on-site application

Ⅳ.oFeasible Policy Proposals
1. A plan for predicting and evaluating noise effects in quiet areas such as surrounding residential areas
o Noise source
ㅇ Select and survey facility-induced noises in power plants during operation
ㅇ Utilize the measured results of the sound power level (facility-induced noise)

o Path
ㅇ Adjust the positions of noise sources
ㅇ Predict the noise effects considering the characteristics of the noise source and the sound propagation
ㅇ Examination of countermeasures according to the prediction result of 3D noise impact
- (Priority setting) Reduction measures for facilities with a high potential of generating noise such as cooling towers
-(Optimal placement) Consider the relocation of noise-generating facilities in consideration of the separation distance from the surrounding residential area

o Receiver
ㅇ Space
- Investigation of noise effects according to the type of noise source such as the chimney of a power plant and their location (indoor / outdoor, height)
ㅇ Time
- Evaluation of noise effects considering operating conditions during weekly / night-time hours
ㅇ Environment
- Evaluation of the noise effects considering the weather effect and operating conditions

2. Post-management policy for noise generated during power plant operation

o Management plan for the effects of low frequency noise
ㅇ Management around a quiet area
- When conducting the post-environmental impact assessment, follow the low-frequency noise management guidelines
o (When the standards are exceeded) Reestablish prevention measures for each major noise source and monitor the noise reduction effect

o Improve the integrated environmental management system for noise generating facilities
ㅇ Expansion of the target group for integrated management
ㅇ Complaint management based on real-time monitoring
ㅇ Applying the best available techniques to high-risk establishments