Environmental Progress & Sustainable Energy最新文献

Analysis of an earth‐to‐air heat exchanger for enhanced residential thermal comfort 分析用于提高住宅热舒适度的土-空气热交换器

Environmental Progress & Sustainable Energy Pub Date : 2024-02-04 DOI: 10.1002/ep.14346

Chandraprakash Dewangan, A. Shukla, Rahul Salhotra, A. Dewan

{"title":"Analysis of an earth‐to‐air heat exchanger for enhanced residential thermal comfort","authors":"Chandraprakash Dewangan, A. Shukla, Rahul Salhotra, A. Dewan","doi":"10.1002/ep.14346","DOIUrl":"https://doi.org/10.1002/ep.14346","url":null,"abstract":"It is well known that a massive demand for thermal comfort has resulted in a sharp rise in energy use for residential space heating and cooling. This article presents numerical simulations of a room coupled with an earth‐to‐air heat exchanger system operating at the climatic condition of 21.2497° N, 81.6050° E for both summer and winter seasons. The present study involves an estimate of monthly variations in soil temperature at different depths and a suitable geometrical arrangement of pipe is proposed. The thermal performance of the earth‐to‐air heat exchanger system in terms of the outlet air temperature and effectiveness has been calculated. It is shown that with an effectiveness of 0.77 in summer and 0.78 in winter, the present EAHE system reduces the ambient air temperature from 38 to 28.2°C in the summer and it rises from 13 to 22.9°C in winter, respectively. Finally, an improvement in the thermal comfort condition of the room exposed to the solar radiation has been examined at different time intervals and different heights of the room. During the summer the room temperature dropped by 4.2°C while in winter it rose by 5.2°C. Furthermore, the environmental effects of system have been evaluated, showing energy savings of 3.90 kWh/day during summer and 4.83 kWh/day during winter leading to a decrease in CO2 emissions of 6.13 kg/day in summer and 7.59 kg/day in winter.","PeriodicalId":394591,"journal":{"name":"Environmental Progress & Sustainable Energy","volume":"2017 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139807117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advancing RCCI engine performance via optimal acetylene premix ratios and advanced diesel injection timing: An experimental investigation 通过优化乙炔预混比例和先进的柴油喷射正时提高 RCCI 发动机性能：实验研究

Environmental Progress & Sustainable Energy Pub Date : 2024-02-02 DOI: 10.1002/ep.14375

Parthasarathi Deb, Abhishek Paul

{"title":"Advancing RCCI engine performance via optimal acetylene premix ratios and advanced diesel injection timing: An experimental investigation","authors":"Parthasarathi Deb, Abhishek Paul","doi":"10.1002/ep.14375","DOIUrl":"https://doi.org/10.1002/ep.14375","url":null,"abstract":"Reactivity controlled compression ignition (RCCI) stands out as an innovative combustion strategy, effectively reconciling stringent emission regulations with precise combustion management and optimal engine performance. In this research, the influence of injection timing of diesel, acting as highly reactive fuel (HRF), alongside variable premix ratios of acetylene, a low reactive fuel (LRF), operating within the RCCI framework has been investigated. In a first‐of‐its‐kind attempt, with a thorough experimental design, the present investigation encompasses a progressive advancement of HRF injection timing, extending up to 110° CA bTDC with 20° CA increments, coupled with LRF integration at premix ratios of up to 70%. Optimal operational conditions materialize at an HRF injection timing advancement of 90° CA bTDC, complemented by a 40% LRF contribution. This configuration yields substantial gains, including a 28.2% upsurge in the cylinder pressure and an 18.6% elevation in the cylinder temperature compared to conventional diesel (CDC) operations. Additionally, the combustion process exhibits an advanced start of combustion (SoC) relative to the CDC baseline, with an 8.53% decline in heat release rate, at 40% LRF enrichment. Under optimal circumstances, moderate hydrocarbon (HC) emissions are noted, while smoke emissions experience a noteworthy reduction of 55.9%, all the while upholding overall output performance. A remarkable 69.8% peak increase in brake thermal efficiency is attained, underscoring the merits of judiciously advancing HRF injection timing and extending LRF utilization within the RCCI paradigm. Thus, the study underscores the synergistic potential between augmented HRF injection timing and controlled LRF integration, offering a promising avenue for elevating the RCCI approach.","PeriodicalId":394591,"journal":{"name":"Environmental Progress & Sustainable Energy","volume":"6 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139810507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Solar drying process for sewage sludge in a drying bed: A case study in Tunisia 干燥床中污水污泥的太阳能干燥工艺:突尼斯的案例研究

Environmental Progress & Sustainable Energy Pub Date : 2023-06-28 DOI: 10.1002/ep.14227

Azza Masmoudi, Ahlem Ben Sik Ali, H. Dhaouadi, H. Mhiri

引用次数: 1

Studies on the efficiency of fish scale adsorbents for treatment of fish processing effluent 鱼鳞吸附剂处理鱼类加工废水的效果研究

Environmental Progress & Sustainable Energy Pub Date : 2023-06-06 DOI: 10.1002/ep.14195

S. Devasena, P. Padmavathy, V. Rani, P. Ganesan, J. J. Pereira

引用次数: 0

Clean printing of cotton fabrics using novel environmental‐friendly phthalocyanine‐monoazo reactive dyes 使用新型环保酞菁-单偶氮活性染料对棉织物进行清洁印花

Environmental Progress & Sustainable Energy Pub Date : 2023-05-31 DOI: 10.1002/ep.14205

Liu Hu, Yingsong Yu, Huayu Han, Shangkun Zhang, Y. Hu, Xiyu Song

引用次数: 0

Effective hydrolysis of NH 3 BH 3 for hydrogen evolution by the novel graphene quantum dots loaded bimetallic nanoparticles (Pt‐Co/GQDs) 负载双金属纳米粒子(Pt‐Co/GQDs)的新型石墨烯量子点有效水解nh3bh3促进析氢

Environmental Progress & Sustainable Energy Pub Date : 2023-04-18 DOI: 10.1002/ep.14161

Jie Cao, Fatao Zhang, T. Xiao, Lihua Jiang, Weifeng Chen, Xinyu Tan

引用次数: 0

Environmental Progress &amp; Sustainable Energy最新文献

Environmental Progress & Sustainable Energy最新文献