Scholarlink

<p>Portable generators are widely used in Iraq to supply electricity during blackouts. However, they are noisy due to the engine’s combustion chamber and moving parts, which can negatively impact the neuroendocrine, cardiovascular, pulmonary, and digestive systems. In this work, the noise reduction of the generator using an acoustic enclosure&#xa0;made of local materials has been studied experimentally. The enclosure was made of medium-density fiber, galvanized iron, glass wool, cork, air gap, and compressed sponge. A 2-kW generator was tested for sound level in two scenarios: with and without multi-layered enclosure containing shredded plastic. The outcomes included determining the sound level and reduction in noise caused by the generator in decibels during the day and at night for various load conditions ranging from 0&#xa0;to 25%, 50%, 75%, and 100% load, and at a distance 5&#xa0;m, as well as measuring the thermal performance of the generator when the enclosure&#xa0;was applied. The&#xa0;enclosure&#xa0;filled with shredded plastic at 5&#xa0;m reached the permissible limit according to Iraqi Law No. 41 of 2015, as the limit reached with a load of 25% is 63.3&#xa0;dB during the day. It&#xa0;approached the permissible limit during the night with a load of 50%, which is 62.9&#xa0;dB. The generator head cylinder’s temperature was below the 300 degrees Celsius upper limit permitted for air-cooled generators. The daytime temperature was 177.8&#xa0;°C, and the nighttime temperature was 164.5&#xa0;°C. This study introduces a cost-effective multi-layered enclosure using recycled plastic and natural materials to reduce generator noise by up to 13&#xa0;dB, while maintaining safe operating temperatures.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

An Experimental Study on Reducing the Sound Level of Portable Generators Using a Locally Manufactured Enclosure

  • 期刊论文

  • 发表日期：

    2026年2月22日

查看全文
  • Mahmood S. Mahmood,
  • Eman Mohamed Ismail,
  • Sabreen Abdulrazaq Abood,
  • Karrar Saeed Mohammed,
  • Murtadha Saeed Mohammed,
  • Raad Z. Homod,
  • Hayder I. Mohammed

摘要

Portable generators are widely used in Iraq to supply electricity during blackouts. However, they are noisy due to the engine’s combustion chamber and moving parts, which can negatively impact the neuroendocrine, cardiovascular, pulmonary, and digestive systems. In this work, the noise reduction of the generator using an acoustic enclosure made of local materials has been studied experimentally. The enclosure was made of medium-density fiber, galvanized iron, glass wool, cork, air gap, and compressed sponge. A 2-kW generator was tested for sound level in two scenarios: with and without multi-layered enclosure containing shredded plastic. The outcomes included determining the sound level and reduction in noise caused by the generator in decibels during the day and at night for various load conditions ranging from 0 to 25%, 50%, 75%, and 100% load, and at a distance 5 m, as well as measuring the thermal performance of the generator when the enclosure was applied. The enclosure filled with shredded plastic at 5 m reached the permissible limit according to Iraqi Law No. 41 of 2015, as the limit reached with a load of 25% is 63.3 dB during the day. It approached the permissible limit during the night with a load of 50%, which is 62.9 dB. The generator head cylinder’s temperature was below the 300 degrees Celsius upper limit permitted for air-cooled generators. The daytime temperature was 177.8 °C, and the nighttime temperature was 164.5 °C. This study introduces a cost-effective multi-layered enclosure using recycled plastic and natural materials to reduce generator noise by up to 13 dB, while maintaining safe operating temperatures.