Energy, economic, and environmental analysis of converging air-based photovoltaic-thermal (air/PV-T) systems: A yearly benchmarking

Energy, economic, and environmental analysis of converging air-based photovoltaic-thermal (air/PV-T) systems: A yearly benchmarking
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空气光伏热(空气/PV-T)系统的能源、经济和环境分析:年度基准测试

DOI:
10.1016/j.jclepro.2023.139871
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发表时间:
2024
影响因子:
11.1
通讯作者:
Dehghan M
Dehghan M
中科院分区:
环境科学与生态学1区
文献类型:
--
作者:
Dehghan M

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本文对光伏-热(PV-T)系统的两种收敛通道配置进行了数值研究,即不同侧面的进口和出口(案例1)和中间的进口和侧面的出口(案例2)。结果表明,案例1具有几乎均匀且较低的实际气流温度分布(高达7°C),并且适当的收敛比为2:1(入口与出口通道高度),其中PV表面温度比类似的传统集热器低8°C。同时,基于所谓的“每PV表面积的额外能量增益率,E˙A c (W/ m2)”的能量分析表明,空气质量流量的最佳极限为~ 0.1 kg/ m2。对于一个典型的传统发电厂来说,换算系数(PPC f)为0.3-0.4。在此限制下,通过将PV转换为拟议的对应PV- t系统,每单位面积的PV组件可以获得高达500瓦的额外功率,与独立PV(0.037-0.146美元/千瓦时)相比,将PV- t的平准化能源成本(LCOE)降低了一个数量级(0.02-0.054美元/千瓦时)。与传统的pv - t和相应的独立pv相比,这种pv - t显示出10%和150%的二氧化碳净减排量。
Two converging channel configurations of photovoltaic-thermal (PV-T) systems, ie, inlet and outlet at different sides (Case 1) and the inlet at the middle and outlets at the sides (Case 2), are investigated numerically. The results reveal that Case 1 features a nearly uniform and lower temperature distribution (up to 7° C) for practical air flows, and the appropriate convergence ratio is 2: 1 (inlet to outlet channel height) for which the PV surface temperature is lower by 8° C than that of a similar conventional collector. Meanwhile, energy analyses based on the so called ‘rate of extra energy gain per PV surface area, E˙ A c (W/m 2)’show that the air mass-flow rate has an optimal limit of∼ 0.1 kg/m 2. s for a typical conventional power plant conversion factor (PPC f) of 0.3–0.4. At this limit, up to 500 W extra power per unit area of PV module can be gained by changing a PV to its proposed counterpart PV-T system reducing the levelized cost of energy (LCOE) by an order of magnitude for the PV-T (0.02–0.054$/kWh) compared to a standalone PV (0.037–0.146$/kWh). Such PV-Ts show 10% and 150% net CO 2 mitigation in comparison to the conventional PV-Ts and the corresponding standalone PVs.
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