Article
Thermodynamics
Y. Nandakishora, Ranjit K. Sahoo, S. Murugan, Sai Gu
Summary: A cryogenic distillation-based CO2 separation process (CCSP) is developed and improved by utilizing waste heat and integrating organic Rankine cycle (ORC), resulting in lower energy consumption compared to traditional CCUS processes.
Article
Thermodynamics
Xia Zhou, Hanwei Zhang, Yangyiming Rong, Jian Song, Song Fang, Zhuoren Xu, Xiaoqin Zhi, Kai Wang, Limin Qiu, Christos N. Markides
Summary: The annual energy consumption of cryogenic air separation units in China is high, with a significant amount of energy dissipated as waste heat during compression processes. The use of organic Rankine cycle (ORC) based waste heat recovery systems can effectively recover and utilize this waste heat, bringing economic and environmental benefits. Case studies and analysis show that the ORC-m-VCR system performs the best when the expansion work-electricity conversion efficiency is low.
Article
Thermodynamics
George Kallis, Tryfon C. Roumpedakis, Platon Pallis, Zoi Koutantzi, Antonios Charalampidis, Sotirios Karellas
Summary: The Marine ORC prototype unit is a waste heat recovery system based on a conventional low-temperature subcritical Organic Rankine Cycle. The system has shown improved environmental performance in several impact categories, but also has some negative effects, such as mineral resource consumption and terrestrial ecotoxicity.
Article
Thermodynamics
Xuelei Zhang, Zhuoyuan Zhang, Gaofeng Wang
Summary: This study proposes a novel combined cycle for CO2 capture from coal-fired power plants, which integrates a supercritical CO2 Brayton cycle and an organic Rankine cycle. The results show promising exergy efficiency and economic performance. The proposed combined cycle has the potential to compete with other carbon capture technologies.
Article
Thermodynamics
Xia Zhou, Song Fang, Hanwei Zhang, Zhuoren Xu, Yubo Yao, Haoran Gan, Xiaoqin Zhi, Limin Qiu, Kai Wang
Summary: This paper conducts dynamic simulation of the ORVC-air compression heat recovery system (ORVCACS) and proposes an improved lumped parameter model. The results show that the ORVC-ACS can operate normally under design conditions and has significant energy saving and environmental performance.
APPLIED THERMAL ENGINEERING
(2023)
Article
Engineering, Marine
Long Lyu, Ankang Kan, Wu Chen, Yuan Zhang, Bingchun Fu
Summary: This paper introduced an environmental method of generating electricity by recovering waste heat from a marine main engine, using organic Rankine cycle (ORC) technology to minimize carbon dioxide emissions for ships. The study analyzed the impact of various engine loads and operating times on the performance of the ORC system using three different dry-type substances. The results showed that Cyclohexane provided net power while Benzene was more efficient in terms of thermal efficiency. The study also provided emission data based on a voyage cycle of a container ship.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Thermodynamics
Jinbo Qu, Yongming Feng, Yuanqing Zhu, Song Zhou, Wenping Zhang
Summary: In the context of global decarbonization, there is increasing focus on improving the energy efficiency of marine power plants, with the use of a high-efficiency waste heat recovery system that can generate up to 1,079.1 KW of power at 100% load. The system demonstrated stable operation and high thermal efficiency and exergy efficiency at 90% load. Further techno-economic evaluation showed a payback period of 5.2 years for the system.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Thermodynamics
Lei Sun, Ding Wang, Yonghui Xie
Summary: The study proposes a combined cycle system consisting of S-CO2 cycles and ORC for waste heat recovery of gas turbine and conducts thermodynamic and exergoeconomic analyses to optimize system performance. It is found that using Propane in CO2-based binary mixtures can improve thermodynamic performance and exergoeconomic characteristic. The optimized system can achieve high thermal efficiency, exergy efficiency, and cost effectiveness.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Thermodynamics
Bingchun Liu, Mengya Jia, Yu Liu
Summary: Waste heat recycling has great potential for reducing greenhouse gas emissions. A prediction model forecasts China's energy consumption under different climate scenarios and estimates the potential of waste heat recycling. The results show significant potential for waste heat recycling and economic feasibility.
APPLIED THERMAL ENGINEERING
(2024)
Review
Green & Sustainable Science & Technology
Reyhaneh Loni, Gholamhassan Najafi, Evangelos Bellos, Fatemeh Rajaee, Zafar Said, Mohamed Mazlan
Summary: Waste heat recovery through organic Rankine cycle technology is an effective way to produce energy products, reduce CO2 emissions, and improve system efficiency.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Thermodynamics
Xuanang Zhang, Xuan Wang, Jinwen Cai, Rui Wang, Xingyan Bian, Zhaoxian He, Hua Tian, Gequn Shu
Summary: Engine cooling water contains waste heat, and waste heat recovery (WHR) is essential for improving engine efficiency. However, extreme cooling water temperatures can negatively impact engine emissions and performance. This study proposes a parallel dual expander organic Rankine cycle (ORC) system that can operate in multiple modes to efficiently recover and utilize waste heat from engine cooling water under varying conditions. Through experimental studies, the system characteristics and operation strategy were explored, and four operation modes were developed based on extensive performance experiments. The feasibility of this operating strategy was verified through experiments with 16 different heat sources, demonstrating effective adaptation to heat source variation and the ability to expand applicable conditions by 120%. This study provides a foundation for the practical application of the ORC-WHR system.
Article
Thermodynamics
Lixia Kang, Jianping Tang, Yongzhong Liu
Summary: This paper presents a three-step method for designing the optimal ORC waste heat recovery system that meets the requirements of multi-period and multi-source heat recovery. The method involves selecting candidate working fluids and WHRS cycles, establishing a multi-source and multi-cycle WHRS model, and finalizing the design using a time-sharing model.
Article
Green & Sustainable Science & Technology
Xuemin Ye, Zhijian Dong, Jiawei Lu, Chunxi Li
Summary: This study proposes three technical scenarios to enhance energy utilization efficiency using ORC and CCS systems, improving the thermal performance of the overall system. Through simulation and analysis, it is found that these scenarios can enhance the thermal performance of the system, with the solar-aided coal-fired power generation system showing the best thermoeconomic performance.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2021)
Review
Engineering, Environmental
Mohammad Ja'fari, Muhammad Imran Khan, Sami G. Al-Ghamdi, Artur J. Jaworski, Faisal Asfand
Summary: In energy intensive industries, the use of ORC technology for waste heat recovery can enhance energy efficiency, reduce carbon emissions, and provide a solution for energy saving in the iron and steel sector, contributing to the fight against climate change.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Wenyu Li, Xiang Ling
Summary: This paper proposes an optimization framework for the ORC-WHR system based on a serialized turbine database. By investigating the construction method of the turbine database and conducting case studies, the effectiveness and innovation of the proposed framework are demonstrated. The optimization framework can reduce investment costs and promote the application of the ORC-WHR system.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Lars odegaard Bentsen, Narada Dilp Warakagoda, Roy Stenbro, Paal Engelstad
Summary: This study investigates uncertainty modeling in wind power forecasting using different parametric and non-parametric methods. Johnson's SU distribution is found to outperform Gaussian distributions in predicting wind power. This research contributes to the literature by introducing Johnson's SU distribution as a candidate for probabilistic wind forecasting.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Xing Liu, Qiuchen Wang, Yunhao Wen, Long Li, Xinfang Zhang, Yi Wang
Summary: This study analyzes the characteristics of process parameters in three lean gas ethane recovery processes and establishes a prediction and multiobjective optimization model for ethane recovery and system energy consumption. A new method for comparing ethane recovery processes for lean gas is proposed, and the addition of extra coolers improves the ethane recovery. The support vector regression model based on grey wolf optimization demonstrates the highest prediction accuracy, and the multiobjective multiverse optimization algorithm shows the best optimization performance and diversity in the solutions.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Cairong Song, Haidong Yang, Xian-Bing Meng, Pan Yang, Jianyang Cai, Hao Bao, Kangkang Xu
Summary: The paper proposes a novel deep learning-based prediction framework, aTCN-LSTM, for accurate cooling load predictions. The framework utilizes a gate-controlled multi-head temporal convolutional network and a sparse probabilistic self-attention mechanism with a bidirectional long short-term memory network to capture both temporal and long-term dependencies in the cooling load sequences. Experimental results demonstrate the effectiveness and superiority of the proposed method, which can serve as an effective guide for HVAC chiller scheduling and demand management initiatives.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Zhe Chen, Xiaojing Li, Xianli Xia, Jizhou Zhang
Summary: This study uses survey data from the Loess Plateau in China to evaluate the impact of social interaction on the adoption of soil and water conservation (SWC) technology by farmers. The study finds that social interaction increases the likelihood of farmers adopting SWC, and internet use moderates this effect. The positive impact of social interaction on SWC adoption is more pronounced for farmers in larger villages and those who join cooperative societies.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Chenghua Zhang, Yunfei Yan, Kaiming Shen, Zongguo Xue, Jingxiang You, Yonghong Wu, Ziqiang He
Summary: This paper reports a novel method that significantly improves combustion performance, including heat transfer enhancement under steady-state conditions and adaptive stable flame regulation under velocity sudden increase.
JOURNAL OF CLEANER PRODUCTION
(2024)