A calculation method of a heat rejection system in a lunar power plant consisting of a free-piston Stirling engine (FPSE)

Smirnov, Sergey; Синкевич, М. В.; Antipov, Y. A.; Khalife, Hassan

doi:10.1016/j.actaastro.2020.12.008

Cited by 17 publications

(8 citation statements)

References 3 publications

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“…We conclude that it is possible to achieve a higher electrical power for the experimental equipment. Based on the information found in the literature review, the temperature of the combustion chamber in which the Stirling engine head can be inserted is up to 800-900 °C [7]. Considering what has been proved in the experimental part of the study, Fig.…”

Section: Discussionmentioning

confidence: 99%

Research of a Biomass Boiler with Stirling Engine Microgeneration Unit

Kramens

Vīgants

Liepiņš

et al. 2021

Environmental and Climate Technologies

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A number of intergovernmental agreements, the most important of which are the Paris Agreement (UN Framework Convention on Climate Change) and the European Green Deal, provide for resource efficiency and the reduction of greenhouse gas and particulate matter (PM2.5, PM10) emissions to 2030 (short-term program to reduce emissions by at least 55 %) and to achieve emissions-neutral production, transport and household activities by 2050. The European Union (EU) has taken the lead in developing and implementing climate change mitigation policies for both industrial and private residential homes in the world through a green course. As an EU country, Latvia has joined both the EU-level climate policy and developed its policy, regulatory documents and action plans for 2021–2030 (Latvia’s National Energy and Climate Plan for 2021–2030), climate policy, including a policy aimed at significantly reducing GHG emissions and increasing efficiency in the household sector. Achieving these climate policy goals requires both a change in human habits and more efficient technologies. This article discusses one of the technological solutions that can reduce both greenhouse gas emissions and the release of PM2.5 and PM10 from individual heating systems in private homes and small commercial facilities. Calculations of electrical energy production in mCHP mode of the system for household self-consumption based on experiments will be done. The technology involves the production of heat from biomass or other types of renewable energy sources while generating electricity for self-consumption. Conclusions of CHP mode on overall efficiency will be done.

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Section: Discussionmentioning

confidence: 99%

Research of a Biomass Boiler with Stirling Engine Microgeneration Unit

Kramens

Vīgants

Liepiņš

et al. 2021

Environmental and Climate Technologies

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“…In our previous work [4], the dynamic component was not taken into account due to the small difference in velocities at the inlet and outlet of the radiator pipe and the specific enthalpies ℎ 𝑙 in J/kg were considered, then the amount of heat contained in the refrigerant is calculated as follows:…”

Section: Calculation Methodsmentioning

confidence: 99%

“…The method for determining the temperature state in a two-dimensional formulation is described in our work [4]. Computational studies have been carried out using helium as a refrigerant in the heat rejection system of an FPSE.…”

Section: Calculation Methodsmentioning

confidence: 99%

“…This system can be a single-phased loop, controlled by a pump, or a two-phased loop, composed of heat pipes. In this work we consider a single-phase pumped loop heat rejection system, which is a continuation of our previous work [4]. In our previous work, we proposed a method for calculating the radiator temperatures in a one-dimensional and two-dimensional formulation for a lunar power plant.…”

Section: Introductionmentioning

confidence: 99%

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A method for evaluating the heat rejection efficiency in a Lunar power plant consisting of a free-piston Stirling engine (FPSE)

et al. 2021

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A method for evaluating the heat rejection efficiency in a Lunar power plant consisting of a free-piston Stirling engine FPSE is proposed. The waste heat from the FPSE is absorbed by the refrigerant circulating in a closed pumped loop and then rejected through a radiator into space. The magnitude of the heat flux rejected through the radiator is determined by the temperature difference between the radiator fins and surrounding environment, as well as the surface areas of the radiator and the emissivity coefficient. The method developed is used to qualitatively evaluate the refrigerant efficiency based on calculating the average temperature of the radiator fin which is established during the heat exchange process in the radiator. The method allowed us to determine the most efficient refrigerant in terms of maximum heat rejection at a given operating temperature range without the need of detailed calculations like in the previous works of the authors. Computational studies in a two-dimensional formulation of the radiator, using helium or liquid ammonia as a refrigerant, to determine the quantitative characteristics of the heat rejection process and overall dimensions of the radiator were performed, and a comparative analysis of the results is presented.

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“…This system has a wide range of applications on Earth, especially in regard to areas where the heat source is biomass, 172 natural gas, [173][174][175] and solar energy. [176][177][178][179] In the study of Hu et al, 180 a Stirling generator converts solar energy into electrical energy, generating an average power of 6.8 kW. Similarly, Smirnov et al 181 proposed the use of a nuclear reactor to drive a Stirling power system at the lunar base, which could generate 1.1 kW of electricity with a thermal efficiency of 30%.…”

Section: Power Generation Technologies In the Lunar Basementioning

confidence: 99%