Department of Architectural Engineering & Environmental Design, College of Engineering and Technology, Arab Academy and Science and Technology and Maritime Transport, Alexandria, Egypt.
PLoS One. 2019 Jul 11;14(7):e0219373. doi: 10.1371/journal.pone.0219373. eCollection 2019.
Noise is considered as one of the challenging problems in big cities. However, this noise could be utilized in producing energy especially in dense urban areas. Sound as a form of mechanical energy, it can be converted to electric energy through many approaches including heating, by using the diaphragm and through using piezoelectric materials. This research aims at utilizing noise through using piezoelectric materials as an approach of conversion to produce green sustainable electric energy that can be used to decrease the energy consumption from non-renewable sources and utilizing this energy in street lighting. The study was carried in three bus stations in Alexandria by having measurements during weekdays and weekends in order to study the noise produced in the selected stations and the amount of electric energy that could be produced and utilized in street lighting. The noise level index LDEN was calculated for each of the three selected locations. The equivalent noise level values were always exceeding the limits through the day, evening and night. At daytime they ranged between 75-85 dB which is higher that the permissible limit by 10-20 dB, at evening they ranged from 80-85 dB which is also higher than the permissible limit with 20-25 dB and at the night they ranged from 75-80 dB which is higher by 20-25 dB than the permissible limit. The research concluded that utilizing noise using the piezoelectric material is successful. The electric energy produced from an area of 1.45 m2 containing 690 piezoelectric QB220-503YB transducers at each of the selected stations was about 0.024 watt hr. This amount of electric energy is too small to be used in an application. So the application area should be maximized to hundreds of square meters to produce beneficial electric energy that can be used in lighting 1 LED street lamp or it can be stored and used when needed in applications that use greater amount of electric energy and this would help in reducing the energy consumed.
噪声被认为是大城市面临的挑战之一。然而，这种噪声可以被利用来产生能源，特别是在人口密集的城市地区。声音作为一种机械能，可以通过多种途径转化为电能，包括加热、利用膜片和利用压电材料。本研究旨在利用噪声通过使用压电材料作为转换方法来产生绿色可持续的电能，可以用于减少对不可再生能源的消耗，并将这种能源用于街道照明。该研究在亚历山大的三个公交车站进行，在工作日和周末进行测量，以研究选定车站产生的噪声以及可以产生和用于街道照明的电能数量。计算了三个选定地点的每个地点的噪声水平指数 LDEN。等效噪声级值全天都超过了限值。白天，噪声水平在 75-85dB 之间，比允许值高 10-20dB；傍晚，噪声水平在 80-85dB 之间，比允许值高 20-25dB；晚上，噪声水平在 75-80dB 之间，比允许值高 20-25dB。研究表明，利用压电材料利用噪声是成功的。从每个选定车站的 1.45 平方米面积内包含的 690 个 QB220-503YB 压电换能器中产生的电能约为 0.024 瓦时。这个电量太小，无法在应用中使用。因此，应用面积应该最大化到数百平方米，以产生有益的电能，可用于照明 1 个 LED 路灯，或者在需要更大电量的应用中存储和使用，这将有助于减少能源消耗。
