Flexible management of heat/electricity of novel PV/T systems with spectrum regulation by Ag nano fl uids

被引：52

作者：

Zhang, Chunxiao ^{[1
]}

Shen, Chao ^{[1
]}

Wei, Shen ^{[2
]}

Zhang, Yingbo ^{[1
]}

Sun, Cheng ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Architecture, Key Lab Cold Reg Urban & Rural Human Settlement E, Minist Ind & Informat Technol, Harbin 150090, Peoples R China

[2] Univ Coll London UCL, Bartlett Sch Construct & Project Management, London WC1E 7HB, England

来源：

ENERGY | 2021年 / 221卷

关键词：

Flexible regulation; Heat-to-electric ratio; Monte Carlo method; Ag nanofluids; RADIATIVE-TRANSFER; OPTICAL-PROPERTIES; NANOFLUIDS; PERFORMANCE; OPTIMIZATION; ENHANCEMENT; ENERGY; MODEL;

D O I：

10.1016/j.energy.2021.119903

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Conventional PV/T systems generally focus on maximizing electricity generation by PV modules only, and they do not balance the generation of electricity and heat for buildings. To match the varying energy demand of buildings, a flexible management method of novel PV/T systems with spectrum regulation was investigated by a 2D-Monte Carlo method. To maximize both electricity and heat generation, 40 nm Ag/water nanofluid (Case 1) and 90 nm Ag/water nanofluid (Case 2) have been proposed as optimal electrical and thermal nanofluids to capture solar radiation. Additionally, the influence from both mass fraction regulation and optical thickness regulation on the flexibility of the two PV/T systems was also investigated. The results from this study indicated that increased mass fraction resulted in decreased spectral transmittances of both Ag nanofluids, with non-linear regulation of system energy output. Additionally, increased optical thickness led to reduced spectral transmittance, but with nearly linear profiles. For flexible management of PV/T systems under varying building energy demand, adjusting the optical thickness of nanofluids can be used for daily-basis optimization, while mass fraction regulation can be used for seasonally-based optimization. (c) 2021 Elsevier Ltd. All rights reserved.

引用

页数：9

共 37 条

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