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Techno-economic assessment of providing control energy reserves with a biogas plant

Ervin Saracevic, David Woess, Franz Theuretzbacher, Anton Friedl, Angela Miltner

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 4,   Pages 763-771 doi: 10.1007/s11705-018-1776-x

Abstract: Power supply fluctuations must be compensated by energy system flexibility.The storability of the energy carrier enables biogas plants to generate power flexibly.In this study, the technical and economic effects of providing positive secondary control energy reservesreserves while simultaneously producing biomethane.Profitability of providing control energy reserves largely depends on the prices at the control energy

Keywords： biogas plant     process simulation     control energy reserves     economic assessment     gas storage    

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Theoretical and Technological Challenges of Deep Underground Energy Storage in China Review

Chunhe Yang, Tongtao Wang, Haisheng Chen

Engineering 2023, Volume 25, Issue 6,   Pages 168-181 doi: 10.1016/j.eng.2022.06.021

Abstract:

Deep underground energy storage is the use of deep underground spaces for large-scale energy storage, which is an important way to provide a stable supply of clean energy, enable a strategic petroleumRock salt formations are ideal geological media for large-scale energy storage, and China is rich insalt rock resources and has a major shortage of energy storage space.storage; and ⑤ ensuring the long-term function of deep underground energy storage spaces.

Keywords： Energy reserves     Deep underground energy storage     Bedded rock salt     Salt cavern     Rock mechanics    

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A replenishment for resource reserves：functional reserves— Replacing 1/10~1/5 strategic oil reserve with

Jin Yong,Chen Bingzhen

Strategic Study of CAE 2008, Volume 10, Issue 11,   Pages 4-6

Abstract:

The strategic oil reserve is very important for every large country in the world. In order to meet the basic requirement of the state safety, 3 months strategic oil reserve in every large country was proposed by the different international organizations such as UN, EU, etc. For China, the total amount of strategic oil reserve must be up to about 30 to 90 millions. It is very difficult to achieve it without enormous capita in short time. Based on a new conception as "function reserve" to replenish the "resource reserve", this goal could be more easy to be accomplished.Namely, storing more methanols replaces some percentage of oil. Moreover, the state safety should be ensured. This topic is discussed in the article in detail.

Keywords： function store     strategical oil store     methanol    

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Optimal dynamic emergency reserve activation using spinning, hydro and demand-side reserves

S. Surender REDDY,P. R. BIJWE,A. R. ABHYANKAR

Frontiers in Energy 2016, Volume 10, Issue 4,   Pages 409-423 doi: 10.1007/s11708-016-0431-9

Abstract: An optimal plan is developed to handle the emergency, using the coordinated action of fast and slow reservesIt considers the reserves supplied by the conventional thermal generators (spinning reserves), hydropower units and load demands (demand-side reserves).The optimal backing down of costly/fast reserves and bringing up of slow reserves in each sub-interval

Keywords： demand-side reserves     dynamic reserve activation approach     hydro power units     post contingency     sequentialreserve activation approach     spinning reserves    

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Effect of repeated gonadotropin stimulation on ovarian reserves and proliferation of ovarian surface

Linlin LIANG, Bei XU, Guijin ZHU

Frontiers of Medicine 2009, Volume 3, Issue 2,   Pages 220-226 doi: 10.1007/s11684-009-0037-2

Abstract: This study aimed to evaluate the effect of repeated ovarian stimulation (OS) on the ovarian follicular population and morphology in female mice and its influence on the embryo’s developmental ability, and the profile of the ovarian surface epithelium (OSE). A total of 75 mice were enrolled in this experiment and randomly assigned into three groups: repeated ovarian stimulated group [ =25; receiving 5 IU pregnant mare serum gonadotrophin (PMSG) and human chorionic gonadotropin (hCG) at 6 day intervals for 5 cycles]; single ovarian stimulated group ( =25; receiving 5 IU PMSG and hCG for 1 cycle), and control group ( =25; without additional treatment). The follicle number at various stages and the morphologies were recorded respectively in the three groups. The harvested oocytes or embryos, cleavage rate, good quality embryo rate, and blastocyst production rate were counted and calculated, and the proliferations of ovarian surface epithelium were evaluated respectively. In the three groups, the single ovarian stimulation treatment significantly increased the mean number of ovarian oocytes or embryos (39.25±10.77 one-cell embryos/female); on the other hand, repeated gonadotropin stimulation obtained the lowest mean number (5.15± 2.81 eggs/female, <0.01). Repeated ovarian stimulation also tended to decrease normal follicles of primary follicles (66.67%) and secondary follicles (72.86%), and got the lowest cleavage rate (67.47%), lowest good quality embryo rate (2.41%), and lowest blastocyst production rate (0). The OSE cells adjacent to the antral follicles and corpus luteum (CL) in the repeated ovarian stimulated group (81.8%) had a significantly higher proliferation rate than the other groups. The proliferation rate of the OSE in the single ovarian stimulated group (56.4%) was significantly higher than that in the control group (37.5%) ( <0.01). In conclusion, single ovarian stimulation may produce more oocytes/embryos. However, repeated gonadotropin stimulation may have a negative effect on the ovarian follicular quality, the number of mature retrieved oocytes, and the embryo quality, even increasing the chance of ovarian cancer.

Keywords： gonadotropin-releasing hormone     ovarian reserve     embryo developmental ability     ovarian surface epithelium    

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Natural Gas Hydrate Exploration and Production Technology Research Status and Development Strategy

Fu Qiang,Zhou Shouwei and Li Qingping

Strategic Study of CAE 2015, Volume 17, Issue 9,   Pages 123-132

Abstract: water in low temperatures and high pressures, which is expected to be the most important alternative energy

Keywords： natural gas hydrate     exploration and production     huge reserves     research status     development strategy    

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Outline of Strip Rolling Technological Control Theory

Zhang Jinzhi

Strategic Study of CAE 2001, Volume 3, Issue 4,   Pages 46-55

Abstract:

Classical rolling theory, which is based on the law of the lowest resistance,the condition of constant volume and the condition of equal flow per second,has formed a fairly integrated rolling applied technology science system by means of experiment and deduction. This system reflects only the static law of rolling process,so it is necessary to control dynamic rolling process by drawing high and new technology such as cybernetics, information theory and computer science into the system.During the history of rolling theory, classical rolling theory based on mechanics took the lead before the establishment of spring equation, after that the rolling process control theory based on mechanics and cybernetics took precedence. In this paper,the concept of technological control theory is put forward. A new theory system, which is based on fundamental rolling technology control theory, is set up. Its main content included：the tension theory system in continuous rolling, which reflects the negative feedback effect of tension, is set up;disturbance survey problem is settled in gauge control process;shape theory system, which resembles gauge control theory,by defining dual parameter,is established.

Keywords： continuous rolling     gauge control     shape stiffness     spring equation for rolling mill     comprehensive equal reserves    

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Microwave-induced high-energy sites and targeted energy transition promising for efficient energy deployment

Frontiers in Energy 2022, Volume 16, Issue 6,   Pages 931-942 doi: 10.1007/s11708-021-0771-y

Abstract: In this study, a high-energy-site phenomenon and targeted-energy transition mechanism were identifiedcould reach 2000°C– 4000°C, with the energy density reaching up to 4.0 × 105 W/kg.The whole process, including microwave energy concentration and intense site-energy release, shapes aThe microwave-induced high-energy sites and targeted energy transition provide an important pathway forhigh-efficiency energy deployment and may lead to promising applications.

Keywords： microwave discharge     high-energy sites     targeted-energy transition     morphology design     energy efficiency    

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Analysis of energy saving optimization of campus buildings based on energy simulation

Dingding TONG, Jing ZHAO

Frontiers in Energy 2013, Volume 7, Issue 3,   Pages 388-398 doi: 10.1007/s11708-013-0273-7

Abstract: The energy consumption of campus buildings has specific characteristics, because of the concentratedThe traditional energy system design and operation for campus buildings is only based on the constantstages of public and residential campus buildings to reduce the heating and cooling design load for energystation and total campus energy consumption for annual operation.The comparison of the simulation results showed that the single building energy saving method of the

Keywords： campus buildings     set-point temperature     energy simulation     energy saving optimization    

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Modeling China’s energy dilemma: conflicts among energy saving, energy security, and CO 2 mitigation

Feng FU, Zheng LI, Linwei MA,

Frontiers in Energy 2010, Volume 4, Issue 3,   Pages 295-300 doi: 10.1007/s11708-010-0104-z

Abstract: This study analyzes China’s future energy scenarios stretching until 2050 under different policyportfolios of energy security (e.g., oil import dependency) and CO emissions control.saving, energy security, and CO mitigation.Based on the analysis, an improvement in China’s efficiency in fossil energy conversion and thepromotion of the utilization of non-fossil energy such as nuclear, wind, and hydro energy are recommended

Keywords： Energy dilemma     energy saving     energy security     CO2 mitigation    

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Blockchain in energy systems: values, opportunities, and limitations

Frontiers in Energy 2022, Volume 16, Issue 1,   Pages 9-18 doi: 10.1007/s11708-022-0818-8

Abstract: The structure of a power energy system is becoming more distributed than before.Its use in the energy sector has been pioneered by several pilot projects.However, to date the energy sector has not seen large-scale deployment of blockchain, partly becauseSecond, some promising blockchain-based applications in energy systems are presented.Third, some common misunderstandings of blockchain in energy are discussed.

Keywords： blockchain     immutability     energy trading     energy management     data synchronization    

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Unconventional energy: Seeking the ways to innovate energy science and technology

Jing LIU, Zhixiong GUO

Frontiers in Energy 2018, Volume 12, Issue 2,   Pages 195-197 doi: 10.1007/s11708-018-0568-9

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Impact of household transitions on domestic energy consumption and its applicability to urban energy

Benachir MEDJDOUB, Moulay Larbi CHALAL

Frontiers of Engineering Management 2017, Volume 4, Issue 2,   Pages 171-183 doi: 10.15302/J-FEM-2017029

Abstract: The household sector consumes roughly 30% of Earth’s energy resources and emits approximately 17% ofon these aspects should be more prominent, as they cause between 4% and 30% of variation in domestic energystudy was to investigate the effect in the context of the UK of household transitions on household energyFurthermore, it enabled us to study the relationship between the predicted patterns and the household energysuch a concept in energy forecasting for effective sustainable energy decision-making.

Keywords： urban energy planning     household transitions     smart cities     energy forecasting     household projection     serious    

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Linking renewables and fossil fuels with carbon capture via energy storage for a sustainable energy future

Dawid P. Hanak, Vasilije Manovic

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 3,   Pages 453-459 doi: 10.1007/s11705-019-1892-2

Abstract: Renewable energy sources and low-carbon power generation systems with carbon capture and storage (CCSsustainable energy supply in the future.Deployment of energy storage is expected to increase grid stability and renewable energy utilisation.This can be achieved via wide deployment of CCS linked with energy storage.storage capacity, as well as linking other CCS technologies with renewable energy sources via energy

Keywords： carbon capture     energy storage     renewable energy sources     decarbonisation     fossil fuels    

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Levelized costs of the energy chains of new energy vehicles targeted at carbon neutrality in China

Frontiers of Engineering Management   Pages 392-408 doi: 10.1007/s42524-022-0212-6

Abstract: The diffusion of new energy vehicles (NEVs), such as battery electric vehicles (BEVs) and fuel cell vehiclesThe cost of energy chains is an important factor in the diffusion of NEVs.the diffusion of NEVs, little work has been conducted to analyze the life cycle costs of different energyThe levelized costs of three typical carbon-neutral energy chains are investigated using the life cycleThis work also summarizes policy recommendations on developing energy chains to promote the diffusion

Keywords： energy chain     new energy vehicle     internal combustion engine vehicle     life cycle cost     technological    

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Title Author Date Type Operation

Techno-economic assessment of providing control energy reserves with a biogas plant

Ervin Saracevic, David Woess, Franz Theuretzbacher, Anton Friedl, Angela Miltner

Journal Article

Theoretical and Technological Challenges of Deep Underground Energy Storage in China

Chunhe Yang, Tongtao Wang, Haisheng Chen

Journal Article

A replenishment for resource reserves：functional reserves— Replacing 1/10~1/5 strategic oil reserve with

Jin Yong,Chen Bingzhen

Journal Article

Optimal dynamic emergency reserve activation using spinning, hydro and demand-side reserves

S. Surender REDDY,P. R. BIJWE,A. R. ABHYANKAR

Journal Article

Effect of repeated gonadotropin stimulation on ovarian reserves and proliferation of ovarian surface

Linlin LIANG, Bei XU, Guijin ZHU

Journal Article

Natural Gas Hydrate Exploration and Production Technology Research Status and Development Strategy

Fu Qiang,Zhou Shouwei and Li Qingping

Journal Article

Outline of Strip Rolling Technological Control Theory

Zhang Jinzhi

Journal Article

Microwave-induced high-energy sites and targeted energy transition promising for efficient energy deployment

Journal Article

Analysis of energy saving optimization of campus buildings based on energy simulation

Dingding TONG, Jing ZHAO

Journal Article

Modeling China’s energy dilemma: conflicts among energy saving, energy security, and CO 2 mitigation

Feng FU, Zheng LI, Linwei MA,

Journal Article

Blockchain in energy systems: values, opportunities, and limitations

Journal Article

Unconventional energy: Seeking the ways to innovate energy science and technology

Jing LIU, Zhixiong GUO

Journal Article

Impact of household transitions on domestic energy consumption and its applicability to urban energy

Benachir MEDJDOUB, Moulay Larbi CHALAL

Journal Article

Linking renewables and fossil fuels with carbon capture via energy storage for a sustainable energy future

Dawid P. Hanak, Vasilije Manovic

Journal Article

Levelized costs of the energy chains of new energy vehicles targeted at carbon neutrality in China

Journal Article