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Liu, H; Meng, XH; Liu, H (reprint author), Nankai Univ, Sch Phys, Tianjin 300071, Peoples R China.
Effects of dark energy on the efficiency of charged AdS black holes as heat engines
发表期刊EUROPEAN PHYSICAL JOURNAL C
语种英语
摘要In this paper, we study the heat engine where a charged AdS black hole surrounded by dark energy is the working substance and the mechanical work is done via the PdV term in the first law of black hole thermodynamics in the extended phase space. We first investigate the effects of a kind of dark energy (quintessence field in this paper) on the efficiency of the RN-AdS black holes as the heat engine defined as a rectangular closed path in the P-V plane. We get the exact efficiency formula and find that the quintessence field can improve the heat engine efficiency, which will increase as the field density pq grows. At some fixed parameters, we find that a larger volume difference between the smaller black holes(V-1) and the bigger black holes(V-2) will lead to a lower efficiency, while the bigger pressure difference P-1 - P-4 will make the efficiency higher, but it is always smaller than 1 and will never be beyond the Carnot efficiency, which is the maximum value of the efficiency constrained by thermodynamics laws; this is consistent to the heat engine in traditional thermodynamics. After making some special choices for the thermodynamical quantities, we find that the increase of the electric charge Q and the normalization factor a can also promote the heat engine efficiency, which would infinitely approach the Carnot limit when Q or a goes to infinity.
2017
卷号77期号:8页码:556
学科领域Physics
DOIhttp://dx.doi.org/10.1140/epjc/s10052-017-5134-9
项目资助者NSFC ; NSFC ; NSFC ; NSFC
引用统计
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/21989
专题理论物理所科研产出_SCI论文
通讯作者Liu, H (reprint author), Nankai Univ, Sch Phys, Tianjin 300071, Peoples R China.
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GB/T 7714
Liu, H,Meng, XH,Liu, H . Effects of dark energy on the efficiency of charged AdS black holes as heat engines[J]. EUROPEAN PHYSICAL JOURNAL C,2017,77(8):556.
APA Liu, H,Meng, XH,&Liu, H .(2017).Effects of dark energy on the efficiency of charged AdS black holes as heat engines.EUROPEAN PHYSICAL JOURNAL C,77(8),556.
MLA Liu, H,et al."Effects of dark energy on the efficiency of charged AdS black holes as heat engines".EUROPEAN PHYSICAL JOURNAL C 77.8(2017):556.
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