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Possible role of power-to-heat and power-to-gas as flexible loads in German medium voltage networks

Mark KUPRAT, Martin BENDIG, Klaus PFEIFFER

Frontiers in Energy 2017, Volume 11, Issue 2,   Pages 135-145 doi: 10.1007/s11708-017-0472-8

Abstract: As an option to cope with those problems, the technologies of power-to-gas (PtG) and power-to-heat (PtHSecond, the electric boiler, electrode heating boiler, and heat pumps are considered., the network-supporting abilities and the potential to provide ancillary services, such as control power

Keywords： power-to-gas     power-to-heat     flexible loads     ancillary services     coherent energy systems    

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Will Germany move into a situation with unsecured power supply?

Harald SCHWARZ

Frontiers in Energy 2019, Volume 13, Issue 3,   Pages 551-570 doi: 10.1007/s11708-019-0641-z

Abstract: increasing traffic, CO emissions from this mobility sector increased and CO emission from German powercalled “The German Coal Commission”) to propose a time line: how Germany can move out of coal-fired powermade: ① Until 2022: Due to a former decision of the German Government, the actual remaining nuclear powerplants should be switched off. ③ Until 2038: The final 17 GW of German hard coal or lignite-fired powerCoal Commission” has not investigated the relevant technical parameter to ensure a secured electric power

Keywords： CO2 reduction     mobility sector     renewable generation     coal commission     secured power generationcapacity     reliable power supply     power-to-gas     power-to-heat    

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Integrated energy in Germany–A critical look at the development and state of integrated energies in Germany

Saman AMANPOUR, Daniel HUCK, Mark KUPRAT, Harald SCHWARZ

Frontiers in Energy 2018, Volume 12, Issue 4,   Pages 493-500 doi: 10.1007/s11708-018-0570-2

Abstract: In the face of global warming and a scarcity of resources, future energy systems are urged to undergo a major and radical transformation. The recognition of the need to embrace renewable energy technologies and to move toward decarbonization has led to significant changes in the German energy generation, consumption and infrastructure. Ambitious German national plans to decrease carbon dioxide emissions on one side, and the unpredictable and volatile nature of renewable energy sources on the other side have elevated the importance of integrated energies in recent years. The deployment of integrated technologies as a solution to interlink various infrastructures creates opportunities for increasing the reliability of energy systems, minimizing environmental impacts and maximizing the share of renewable resources. This paper discusses the role of integrated energy systems in supporting of sustainable solutions for future energy transitions. Moreover, the reinforcement of this movement with the help of different technologies will be discussed and the development of integrated energy systems in Germany will be reviewed.

Keywords： integrated energy     renewable energies     energy transition     power-to-gas     power-to-heat     power-to-mobility     energy    

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Optimization of power and efficiency for an irreversible Diesel heat engine

Shiyan ZHENG, Guoxing LIN

Frontiers in Energy 2010, Volume 4, Issue 4,   Pages 560-565 doi: 10.1007/s11708-010-0018-9

Abstract: A cyclic model of an irreversible Diesel heat engine is presented, in which the heat loss between theusing the thermodynamic analysis and optimal control theory methods, the analytical expressions of poweroutput and efficiency of the Diesel heat engine are derived.The optimum operating region of the heat engine is determined.Moreover, the optimum criterion of some important parameters, such as the power output, efficiency, pressure

Keywords： Diesel heat engine     irreversibility     power output     efficiency     parameter optimization    

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Carbon emission impact on the operation of virtual power plant with combined heat and power system

Yu-hang XIA,Jun-yong LIU,Zheng-wen HUANG,Xu ZHANG

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 5,   Pages 479-488 doi: 10.1631/FITEE.1500467

Abstract: With the expansion of VPPs and ever-growing heat demand of consumers, managing the effect of fluctuationsand heat energy to users have been important issues.supplying heat, which can not only overcome the limitation of heat output from a combined heat and powerAfter the electric boiler is considered in the VPP operation model of the combined heat and power systemThe power output of each unit in the case study is analyzed under four scenarios.

Keywords： Virtual power plant (VPP)     Carbon emissions     Electric boiler     Wind power     Combined heat and power (CHP    

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Experimental investigation of liquid metal alloy based mini-channel heat exchanger for high power electronic

Manli LUO, Jing LIU

Frontiers in Energy 2013, Volume 7, Issue 4,   Pages 479-486 doi: 10.1007/s11708-013-0277-3

Abstract: for developing efficient techniques for cooling integrated electronic devices with ever increasing heatgeneration power.To better tackle the high-density heat dissipation difficulty within the limited space, this paper isThe simulated heat sources were all cooled down by these three heat dissipation apparatuses and the exchangerconditions due to its much larger heat transfer area.

Keywords： heat exchanger     liquid metal     mini-channel     heat dissipation     heat transfer coefficient    

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Research on Raising Heat-power of the Gear Reducer With Middle-power

Hu Rufu,Zhang Dongsu

Strategic Study of CAE 2004, Volume 6, Issue 4,   Pages 72-76

Abstract:

Heat-power is an impartment performance index to choose the gear reducer.The working efficiency of the gear reducer lies on the value of the heat-power when working with theRaising Heat-power will benefit working efficiency, and reduce the waste of energy sources.The formula to calculate efficiency is deduced, and the heat-power is tested by way of experiment.On the basis of this, the methods are brought forward to raise heat-power of gear reducers considering

Keywords： gear-reducer     heat-power     heat-efficiency     heat-radiating equipment    

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Efficient use of waste heat and solar energy: Technologies of cooling, heating, power generation andheat transfer

Ya-Ling HE, Ruzhu WANG, Anthony Paul ROSKILLY, Peiwen LI

Frontiers in Energy 2017, Volume 11, Issue 4,   Pages 411-413 doi: 10.1007/s11708-017-0525-z

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comparative study of the feasibility of the hybrid renewable energy systems incorporating combined heatand power technology

Frontiers in Energy 2022, Volume 16, Issue 2,   Pages 336-356 doi: 10.1007/s11708-021-0748-x

Abstract: to identify a grid connected renewable energy system coupled with natural gas reciprocating combined heatand power unit, that is cost-effective and technically feasible with a potential to generate a profit

Keywords： greenhouse gas control     low carbon target     grid connected     renewable fraction     fuel poverty     combined heatand power     HOMER Pro    

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Combined heat and power economic dispatch problem using firefly algorithm

Afshin YAZDANI, T. JAYABARATHI, V. RAMESH, T. RAGHUNATHAN

Frontiers in Energy 2013, Volume 7, Issue 2,   Pages 133-139 doi: 10.1007/s11708-013-0248-8

Abstract: Cogeneration units, which produce both heat and electric power, are found in many process industries.These industries also consume heat directly in addition to electricity.Each point within the feasible zone consists of a specific value of heat and electric power.These units are used along with other units, which produce either heat or power exclusively.

Keywords： combined heat and power (CHP) economic dispatch     meta-heuristic algorithm     firefly algorithm     cogeneration    

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Combined heat and power economic dispatch problem using the invasive weed optimization algorithm

T. JAYABARATHI, Afshin YAZDANI, V. RAMESH, T. RAGHUNATHAN

Frontiers in Energy 2014, Volume 8, Issue 1,   Pages 25-30 doi: 10.1007/s11708-013-0276-4

Abstract: Cogeneration units which produce both heat and electric power are found in many process industries.These industries also consume heat directly in addition to electricity.Each point within the feasible zone consists of a specific value of heat and electric power.These units are used along with other units which produce either heat or power exclusively.

Keywords： combined heat and power (CHP)     economic dispatch     meta-heuristic algorithm     invasive weed optimization     cogeneration    

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Analysis of the radiation heat transfer process of phase change for a liquid droplet radiator in spacepower systems

Jinying YIN, Linhua LIU

Frontiers in Energy 2011, Volume 5, Issue 2,   Pages 166-173 doi: 10.1007/s11708-010-0105-y

Abstract: The optimization of a space power system is greatly affected by the radiation heat transfer in a liquidRadiation heat transfer in a two-dimensional bed of phase-change particle is modeled by solving the radiativeMultiple factors affect heat flux in the LDR, such as size distribution, flow velocity, phase changeSize distribution has a remarkably strong effect on heat flux when the flow velocity of the working fluidflux, whereas the thickness of the layer has a mild influence on heat flux.

Keywords： radiation heat transfer     particle polydispersion     liquid droplet radiator     phase change    

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Combined heat and power plant integrated with mobilized thermal energy storage (M-TES) system

Weilong WANG, Yukun HU, Jinyue YAN, Jenny NYSTR?M, Erik DAHLQUIST

Frontiers in Energy 2010, Volume 4, Issue 4,   Pages 469-474 doi: 10.1007/s11708-010-0123-9

Abstract: District heating (DH) is used to supply heat to areas with high energy demand.or sparse areas using industrial heat.In this paper, the integration of a combined heat and power (CHP) plant and an M-TES system is analyzedFurthermore, the impacts of four options of the integrated system are discussed, including the powerand heat output in the CHP plant.

Keywords： Mobilized thermal energy system     district heating     thermal energy storage     combined heat and power     detached    

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A space power system of free piston Stirling generator based on potassium heat pipe

Mingqiang LIN, Jian MOU, Chunyun CHI, Guotong HONG, Panhe GE, Gu HU

Frontiers in Energy 2020, Volume 14, Issue 1,   Pages 1-10 doi: 10.1007/s11708-019-0655-6

Abstract: The power system of a free piston Stirling generator (FPSG) based on potassium heat pipes has been developedBesides, the power system integrated with four FPSGs and potassium heat pipes was performed and the singleThe results show that this system could provide an electrical power of 300 W at an overall thermal efficiencyThus, it is concluded that this power system is feasible and will have a great prospect for future applications

Keywords： free piston Stirling generator (FPSG)     potassium heat pipe     power system     energy conversion    

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Thermo-economic analysis of a direct supercritical CO electric power generation system using geothermalheat

Frontiers in Energy 2022, Volume 16, Issue 2,   Pages 246-262 doi: 10.1007/s11708-021-0749-9

Abstract: A comprehensive thermo-economic model combining a geothermal heat mining system and a direct supercriticalCO2 turbine expansion electric power generation system was proposed in this paper.Specifically, in geothermal heat extraction simulation, an integrated wellbore-reservoir system modelT2Well/ECO2N) was used to generate a database for creating a fast, predictive, and compatible geothermal heatIt was found that for a 100 MWe power plant, a minimal LCOE of $0.177/kWh was achieved for

Keywords： geothermal heat mining     supercritical CO2     power generation     thermo-economic analysis     optimization    

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Title Author Date Type Operation

Possible role of power-to-heat and power-to-gas as flexible loads in German medium voltage networks

Mark KUPRAT, Martin BENDIG, Klaus PFEIFFER

Journal Article

Will Germany move into a situation with unsecured power supply?

Harald SCHWARZ

Journal Article

Integrated energy in Germany–A critical look at the development and state of integrated energies in Germany

Saman AMANPOUR, Daniel HUCK, Mark KUPRAT, Harald SCHWARZ

Journal Article

Optimization of power and efficiency for an irreversible Diesel heat engine

Shiyan ZHENG, Guoxing LIN

Journal Article

Carbon emission impact on the operation of virtual power plant with combined heat and power system

Yu-hang XIA,Jun-yong LIU,Zheng-wen HUANG,Xu ZHANG

Journal Article

Experimental investigation of liquid metal alloy based mini-channel heat exchanger for high power electronic

Manli LUO, Jing LIU

Journal Article

Research on Raising Heat-power of the Gear Reducer With Middle-power

Hu Rufu,Zhang Dongsu

Journal Article

Efficient use of waste heat and solar energy: Technologies of cooling, heating, power generation andheat transfer

Ya-Ling HE, Ruzhu WANG, Anthony Paul ROSKILLY, Peiwen LI

Journal Article

comparative study of the feasibility of the hybrid renewable energy systems incorporating combined heatand power technology

Journal Article

Combined heat and power economic dispatch problem using firefly algorithm

Afshin YAZDANI, T. JAYABARATHI, V. RAMESH, T. RAGHUNATHAN

Journal Article

Combined heat and power economic dispatch problem using the invasive weed optimization algorithm

T. JAYABARATHI, Afshin YAZDANI, V. RAMESH, T. RAGHUNATHAN

Journal Article

Analysis of the radiation heat transfer process of phase change for a liquid droplet radiator in spacepower systems

Jinying YIN, Linhua LIU

Journal Article

Combined heat and power plant integrated with mobilized thermal energy storage (M-TES) system

Weilong WANG, Yukun HU, Jinyue YAN, Jenny NYSTR?M, Erik DAHLQUIST

Journal Article

A space power system of free piston Stirling generator based on potassium heat pipe

Mingqiang LIN, Jian MOU, Chunyun CHI, Guotong HONG, Panhe GE, Gu HU

Journal Article

Thermo-economic analysis of a direct supercritical CO electric power generation system using geothermalheat

Journal Article