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Effect of natural resource on improving indoor thermal environment in Chongqing

Yong DING, Baizhan LI, Qing LUO, Hong LIU, Meng LIU

《结构与土木工程前沿（英文）》 2009年第3卷第2期页码 211-218 doi: 10.1007/s11709-009-0018-1

摘要： This paper analyzes the potential of natural resources to improve the indoor thermal environment in Chongqing through the statistical analysis of natural resources including solar energy, wind, water, and earth, etc. The building form, systems, and principle of usage of natural resources are briefly analyzed through the building site decision, building form design, and computer simulation, which will be the real reference for the design of building energy efficiency.

关键词： natural resource indoor thermal environment renewable energy

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中国页岩气资源潜力及其在天然气未来发展中的地位

赵文智,董大忠,李建忠,张国生

《中国工程科学》 2012年第14卷第7期页码 46-52

摘要：

中国页岩气勘探已在四川、鄂尔多斯等盆地及重庆、云南、贵州、湖南等地区获得发现，证实具有良好资源前景。依据最新资料，落实了稳定区面积、集中段厚度、可采资源丰度、含气量等资源评价关键参数，采用3种方法预测了我国页岩气可采资源量及分布。借鉴美国典型页岩气区发展经验，采用多种方法预测了我国页岩气未来达到的产量规模和发展路线图，明确提出了页岩气在我国未来天然气发展中的地位和作用。

关键词：页岩气资源潜力天然气未来发展地位

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我国非常规天然气开发利用前景与战略地位

“能源领域咨询研究”综合组

《中国工程科学》 2015年第17卷第9期页码 6-10

摘要：

我国非常规天然气资源比较丰富，开发利用程度低，且有后发优势，加快非常规天然气资源开发利用对我国经济社会发展与能源安全具有重要战略意义。本文在客观评价四类非常规天然气资源潜力与开发趋势的基础上，提出了我国非常规天然气开发利用战略和措施建议。研究认为，我国页岩气、致密砂岩气和煤层气可采资源总量约为3.1×1013 m3，大约是常规天然气可采资源量的1.5倍，技术进步和国家政策扶持是实现非常规天然气资源大规模开发利用的关键。我国非常规天然气开发利用可采取“三步走”的路线，积极组织，加快发展，预计到2020年前后，我国非常规天然气产量将与常规天然气平分秋色，2030年前后非常规天然气产量有望达到3×1011 m3，约占总产量的2/3，非常规天然气将成为保障我国天然气工业长期稳定和健康发展的主体资源。

关键词：非常规天然气；资源潜力；开发利用；战略地位

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我国天然气资源潜力及其在未来低碳经济发展中的重要地位

邱中建,赵文智,胡素云,张国生,方辉

《中国工程科学》 2011年第13卷第6期页码 81-87

摘要：

以天然气发展趋势分析为基础，对我国天然气的资源潜力、加快发展的有利条件、2030年以后可能达到的规模以及在未来低碳经济发展中的地位进行了系统研究。研究结果表明，我国常规与非常规天然气资源都很丰富，而且天然气工业发展比石油大约晚30年，目前刚刚进入大发展的初期，未来具有十分良好的发展前景，预计到2030年我国天然气年产量有望达到3 000亿m³，并有望保持到2050年。同时，研究发现我国毗邻中亚—俄罗斯、中东和亚太三大富气区，具有多元化利用国外资源的区位优势。通过自产与引进并重，2030—2050年天然气在我国一次能源结构中比例有望达到10 %以上，对改善能源结构和推动低碳经济发展将发挥重要作用。

关键词：天然气资源潜力发展趋势地位低碳经济

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Research on the theory and application of adsorbed natural gas used in new energy vehicles: A review

Zhengwei NIE,Yuyi LIN,Xiaoyi JIN

《机械工程前沿（英文）》 2016年第11卷第3期页码 258-274 doi: 10.1007/s11465-016-0381-2

摘要：

Natural gas, whose primary constituent is methane, has been considered a convincing alternative for the growth of the energy supply worldwide. Adsorbed natural gas (ANG), the most promising methane storage method, has been an active field of study in the past two decades. ANG constitutes a safe and low-cost way to store methane for natural gas vehicles at an acceptable energy density while working at substantially low pressures (3.5–4.0 MPa), allowing for conformable store tank. This work serves to review the state-of-the-art development reported in the scientific literature on adsorbents, adsorption theories, ANG conformable tanks, and related technologies on ANG vehicles. Patent literature has also been searched and discussed. The review aims at illustrating both achievements and problems of the ANG technologies-based vehicles, as well as forecasting the development trends and critical issues to be resolved of these technologies.

关键词： adsorbed natural gas (ANG) adsorbent adsorption theory conformable tank natural gas vehicles (NGVs)

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Use of float consumption rate in resource leveling of construction projects

Atilla DAMCI, Gul POLAT, Firat Dogu AKIN, Harun TURKOGLU

《工程管理前沿（英文）》 2022年第9卷第1期页码 135-147 doi: 10.1007/s42524-020-0118-0

摘要： The management of resources has been claimed to be as important as scheduling methods. Inefficiency in managing resources may bring about severe delays and cost overruns caused by resource shortages in some cases and/or idle resources in others. Therefore, resources should be utilized efficiently to prevent project failures. Resource leveling is one of the approaches that are used for the management of resources. It aims to minimize fluctuations, peaks, and valleys in resource utilization without changing the completion time of a project and the number of resources required. Although the main principle behind traditional resource leveling is achieving an even flow of resources while the original project duration remains unchanged, the literature supports the need to develop an efficient model that discriminates among the activities that are selected for participation in resource leveling. For this purpose, this study has developed a model that considers the float consumption rates of activities in resource leveling. The float consumption rate is the percentage that is set to determine the maximum amount of float which will be consumed to shift the start time of the activity. The proposed model allows a scheduler to assign float consumption rates to each activity that can be used during the resource leveling procedure. When the required information is inputted, the proposed model automatically changes the required daily resources as it shifts the noncritical activities along their available total float times. The proposed model is expected to minimize the likelihood of severe delays and cost overruns. The model is demonstrated by constructing a network and its resource utilization histograms.

关键词： resource management resource leveling float consumption rate scheduling

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Effects of natural zeolite and sulfate ions on the mechanical properties and microstructure of plastic

《结构与土木工程前沿（英文）》 2022年第16卷第1期页码 86-98 doi: 10.1007/s11709-021-0793-x

摘要： One of the strategic materials used in earth-fill embankment dams and in modifying and preventing groundwater flow is plastic concrete (PlC). PlC is comprised of aggregates, water, cement, and bentonite. Natural zeolite (NZ) is a relatively abundant mineral resource and in this research, the microstructure, unconfined strength, triaxial behavior, and permeability of PlC made with 0%, 10%, 15%, 20%, and 25% replacement of cement by NZ were studied. Specimens of PIC-NZ were subjected to confined conditions and three different confining pressures of 200, 350, and 500 kPa were used to investigate their mechanical behavior and permeability. To study the effect of sulfate ions on the properties of PlC-NZ specimens, the specimens were cured in one of two different environments: normal condition and in the presence of sulfate ions. Results showed that increasing the zeolite content decreases the unconfined strength, elastic modulus, and peak strength of PlC-NZ specimens at the early ages of curing. However, at the later ages, increasing the zeolite content increases unconfined strength as well as the peak strength and elastic modulus. Specimens cured in the presence of sulfate ions indicated lower permeability, higher unconfined strength, elastic modulus, and peak strength due to having lower porosity.

关键词： plastic concrete sulfate resistance natural zeolite triaxial compression test SEM permeability

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A review on technologies with electricity generation potentials using liquified natural gas regasification

《能源前沿（英文）》 2023年第17卷第3期页码 332-379 doi: 10.1007/s11708-023-0863-y

摘要： In modern times, worldwide requirements to curb greenhouse gas emissions, and increment in energy demand due to the progress of humanity, have become a serious concern. In such scenarios, the effective and efficient utilization of the liquified natural gas (LNG) regasification cold energy (RCE), in the economically and environmentally viable methods, could present a great opportunity in tackling the core issues related to global warming across the world. In this paper, the technologies that are widely used to harness the LNG RCE for electrical power have been reviewed. The systems incorporating, the Rankine cycles, Stirling engines, Kalina cycles, Brayton cycles, Allam cycles, and fuel cells have been considered. Additionally, the economic and environmental studies apart from the thermal studies have also been reviewed. Moreover, the discussion regarding the systems with respect to the regassification pressure of the LNG has also been provided. The aim of this paper is to provide guidelines for the prospective researchers and policy makers in their decision making.

关键词： liquified natural gas cold energy power generation

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Accelerating the construction of natural gas system engineering in green smart cities

Xinhua MA

《工程管理前沿（英文）》 2019年第6卷第3期页码 453-456 doi: 10.1007/s42524-019-0046-z

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New nanostructured sorbents for desulfurization of natural gas

Lifeng WANG, Ralph T. YANG

《化学科学与工程前沿（英文）》 2014年第8卷第1期页码 8-19 doi: 10.1007/s11705-014-1411-4

摘要： Desulfurization of natural gas is achieved commercially by absorption with liquid amine solutions. Adsorption technology could potentially replace the solvent extraction process, particularly for the emerging shale gas wells with production rates that are generally lower than that from the large conventional reservoirs, if a superior adsorbent (sorbent) is developed. In this review, we focus our discussion on three types of sorbents: metal-oxide based sorbents, Cu/Ag-based and other commercial sorbents, and amine-grafted silicas. The advantages and disadvantages of each type are analyzed. Possible approaches for future developments to further improve these sorbents are suggested, particularly for the most promising amine-grafted silicas.

关键词： desulfurization natural gas desulfurization hydrogen sulfide sorbent amine-silica sorbent

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Dehydration of natural gas and biogas streams using solid desiccants: a review

Soheil Bahraminia, Mansoor Anbia, Esmat Koohsaryan

《化学科学与工程前沿（英文）》 2021年第15卷第5期页码 1050-1074 doi: 10.1007/s11705-020-2025-7

摘要： Natural gas and biogas are two mixtures that consist of methane as their main component. These two gas mixtures are usually saturated with water vapor, which cause many problems, such as damaging the gas processing equipment by increasing the gas’s corrosion potential or clogging the pipelines due to gas hydrate formation. Thus, removing water vapor from these gas streams is mandatory. In this review paper, the main dehydration methods have been overviewed, and scrutiny of the adsorption dehydration has been carried out. Furthermore, the most important solid desiccants and their improvements have been reviewed.

关键词： natural gas biogas dehydration adsorption solid desiccant

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2019 highlights of the structural revision of natural product

Zongjia Chen, Mark A. Rizzacasa

《化学科学与工程前沿（英文）》 2021年第15卷第3期页码 595-601 doi: 10.1007/s11705-020-1971-4

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我国西部天然气东输的可行性

邱中建

《中国工程科学》 1999年第1卷第1期页码 94-98

摘要：

我国西部天然气资源十分丰富，占全国天然气总资源量的75%、探明储量的80%，已累计探明储量达13 110×10⁸m³,西部地区已有能力长期稳定年外输气150×10⁸m³。西气东输塔里木天然气有决定意义，目前正在评价的新发现的两个大型气田预计可迅速新增天然气探明储量约5 000×10⁸m³。这些气田储量丰度大，单井产量高，采气成本低。东部长江三角洲地区经济发达，能源短缺，自给率仅为13%，目前能源消费构成中煤炭占76%，城市环境污染严重，是天然气消费的巨大市场。预计2010年天然气需要量253×10⁸m³。西气东输有两个方案，一是塔里木气单独东输，开始年输量100×10⁸m³，第八年开始增加至150×10⁸m³；二是西部诸盆地联合东输，开始年输量150×10⁸m³，第八年开始增加至230×10⁸m³。两个方案均有经济效益，以联合东输方案优点较多。天然气在上海门站每立方米的销售价为1.2～1.3元，是很有竞争力的。项目一旦启动，对东部及西部地区均会带来巨大的好处。

关键词：西部天然气东输可行性

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Mechanisms for simultaneous ozonation of sulfamethoxazole and natural organic matters in secondary effluent

《环境科学与工程前沿（英文）》 2021年第15卷第4期 doi: 10.1007/s11783-020-1368-0

摘要：

• SMX was mainly degraded by hydrolysis, isoxazole oxidation and double-bond addition.

关键词： Sulfamethoxazole Ozonation Natural organic matters Secondary effluent Degradation mechanism

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Influence factors on natural frequencies of composite materials

Bo WANG, Feng ZHAO, Zixu ZHAO, Kunpeng XU

《机械工程前沿（英文）》 2020年第15卷第4期页码 571-584 doi: 10.1007/s11465-020-0592-4

摘要： Compared with traditional materials, composite materials have lower specific gravity, larger specific strength, larger specific modulus, and better designability structure and structural performance. However, the variability of structural properties hinders the control and prediction of the performance of composite materials. In this work, the Rayleigh–Ritz and orthogonal polynomial methods were used to derive the dynamic equations of composite materials and obtain the natural frequency expressions on the basis of the constitutive model of laminated composite materials. The correctness of the analytical model was verified by modal hammering and frequency sweep tests. On the basis of the established theoretical model, the influencing factors, including layers, thickness, and fiber angles, on the natural frequencies of laminated composites were analyzed. Furthermore, the coupling effects of layers, fiber angle, and lay-up sequence on the natural frequencies of composites were studied. Research results indicated that the proposed method could accurately and effectively analyze the influence of single and multiple factors on the natural frequencies of composite materials. Hence, this work provides a theoretical basis for preparing composite materials with different natural frequencies and meeting the requirements of different working conditions.

关键词： composite material hammering and frequency sweep test structural parameter natural frequency