Performance analysis of spectral-splitting CPVT system for solar hydrogen production

ZHANG Junyi; WANG Jiangfeng; LOU Juwei; SUN Lu; DU Yang

doi:10.11949/0438-1157.20260497

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Performance analysis of spectral-splitting CPVT system for solar hydrogen production

更新时间：2026-06-15

- Performance analysis of spectral-splitting CPVT system for solar hydrogen production
- CIESC Journal (2026)
- 作者机构：
  
  1.西安交通大学能源与动力工程学院，陕西西安 710049
  2.西安交通大学人居环境与建筑工程学院，陕西西安 710049
  3.西安交通大学机械工程学院，陕西西安 710049
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20260497
  CLC： TK 519
- Received：10 April 2026，
  
  Revised：2026-06-14，
  
  Accepted：15 June 2026，
- 稿件说明：
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ZHANG Junyi, WANG Jiangfeng, LOU Juwei, et al. Performance analysis of spectral-splitting CPVT system for solar hydrogen production[J/OL]. CIESC Journal, 2026.
DOI：

ZHANG Junyi, WANG Jiangfeng, LOU Juwei, et al. Performance analysis of spectral-splitting CPVT system for solar hydrogen production[J/OL]. CIESC Journal, 2026. DOI： 10.11949/0438-1157.20260497.

摘要

为提高传统太阳能光伏电解制氢效率，提出了一种基于光谱分频的聚光式光伏/光热（CPVT）制氢系统，该系统集成了光谱分频CPVT、回热有机朗肯循环与质子交换膜电解槽。对该系统建立热力学与经济性模型，深入分析了滤光片反射截止波长、聚光比、有机工质等关键参数对系统性能的影响，并与现有系统进行性能对比。结果表明：当滤光片反射截止波长为450~1150nm、聚光比为10时，系统热力学与经济性能较优；在9种有机工质中，乙苯性能最佳；光谱分频器成本过高或PEM电解槽年工作小时数过低会导致经济不可行；在给定工况下，系统太阳能制氢效率、平准化制氢成本、动态投资回收期分别为17.45%、47.55 ¥/kg、10.69年。相比现有系统，该系统在热力学性能上具有显著优势且经济性相当。

Abstract

To improve the solar-to-hydrogen efficiency of conventional solar photovoltaic cells

this study proposes a concentrating photovoltaic/thermal (CPVT) hydrogen production system based on spectral splitting technology. The proposed system integrates a spectral-splitting CPVT subsystem

a regenerative organic Rankine cycle (ORC)

and a proton exchange membrane (PEM) electrolyzer. A comprehensive thermodynamic and economic model is developed to evaluate the system performance. The effects of the filter cut-off wavelength range

concentration ratio

ORC working fluid

spectral splitter cost coefficient

and PEM electrolyzer annual operating hours on system performance are analyzed. Furthermore

the proposed system is compared with existing solar-powered PEM hydrogen production systems in terms of performance. The results indicate that when the filter cut-off wavelength range is 450~1150 nm and the concentration ratio is 10

the proposed system exhibits superior thermodynamic and economic performance. Among the nine organic working fluids

ethylbenzene is identified as the optimal working fluid. The system becomes economically infeasible when the spectral splitter cost is excessively high or when the PEM electrolyzer annual operating hours are insufficient. Under the specified operating conditions

the proposed system achieves a solar-to-hydrogen efficiency of 17.45%

a levelized cost of hydrogen of 47.55 ¥/kg

and a dynamic payback period of 10.69 years. Compared with systems reported in the literature

the proposed system demonstrates significant advantages in thermodynamic performance while maintaining a comparable level of economic performance.

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