TY - JOUR
T1 - Design and energy evaluation of a stand-alone copper-chlorine (Cu-Cl) thermochemical cycle system for trigeneration of electricity, hydrogen, and oxygen
AU - Wu, Wei
AU - Hsu, Fu Teng
AU - Chen, Han Yu
N1 - Funding Information:
The authors would like to thank the Ministry of Science and Technology, Taiwan for its partial financial support of this research under grant MOST 105‐2221‐E‐006‐239.
Publisher Copyright:
Copyright © 2017 John Wiley & Sons, Ltd.
PY - 2018/2/1
Y1 - 2018/2/1
N2 - In this article, a new stand-alone Cu-Cl cycle system (SACuCl) for trigeneration of electricity, hydrogen, and oxygen using a combination of a specific combined heat and power (CHP) unit and a 2-step Cu-Cl cycle using a CuCl/HCl electrolyzer is presented. Based on the self-heat recuperation technology for the CHP unit and the heat integration of the Cu-Cl cycle unit, the power efficiency of the SACuCl for 5 prescribed scenarios (case studies) is predicted to achieve about 48% at least. The SACuCl uses the technologies of the dry reforming of methane and the oxy-fuel combustion to achieve a relatively high CO2 concentration in the flue gas, and CO2 emissions for power generation could be almost restricted by 0.418 kg/kWh. From the aspect of the electricity required for hydrogen production, it is verified that the 2-step Cu-Cl cycle system is superior to the conventional water electrolyzer because the CHP process supplies the heat/electricity for Cu-Cl thermochemical reactions and a thermoelectric generator is connected to the exhaust gas for recovering the power consumption from the compressor and the CuCl/HCl electrolyzer. Finally, the heat exchanger network and the pinch technology are employed to determine the optimum heat recovery of the Cu-Cl cycle. In case 5 analyzed for the SACuCl, the electricity required for the heat-integrated 2-step Cu-Cl cycle is predicted to dramatically decrease from 4.39 to 0.452 kWh/m3 H2 and the cycle energy efficiency could be obviously increased from 23.77 to 31.97%.
AB - In this article, a new stand-alone Cu-Cl cycle system (SACuCl) for trigeneration of electricity, hydrogen, and oxygen using a combination of a specific combined heat and power (CHP) unit and a 2-step Cu-Cl cycle using a CuCl/HCl electrolyzer is presented. Based on the self-heat recuperation technology for the CHP unit and the heat integration of the Cu-Cl cycle unit, the power efficiency of the SACuCl for 5 prescribed scenarios (case studies) is predicted to achieve about 48% at least. The SACuCl uses the technologies of the dry reforming of methane and the oxy-fuel combustion to achieve a relatively high CO2 concentration in the flue gas, and CO2 emissions for power generation could be almost restricted by 0.418 kg/kWh. From the aspect of the electricity required for hydrogen production, it is verified that the 2-step Cu-Cl cycle system is superior to the conventional water electrolyzer because the CHP process supplies the heat/electricity for Cu-Cl thermochemical reactions and a thermoelectric generator is connected to the exhaust gas for recovering the power consumption from the compressor and the CuCl/HCl electrolyzer. Finally, the heat exchanger network and the pinch technology are employed to determine the optimum heat recovery of the Cu-Cl cycle. In case 5 analyzed for the SACuCl, the electricity required for the heat-integrated 2-step Cu-Cl cycle is predicted to dramatically decrease from 4.39 to 0.452 kWh/m3 H2 and the cycle energy efficiency could be obviously increased from 23.77 to 31.97%.
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U2 - 10.1002/er.3894
DO - 10.1002/er.3894
M3 - Article
AN - SCOPUS:85040743987
VL - 42
SP - 830
EP - 842
JO - International Journal of Energy Research
JF - International Journal of Energy Research
SN - 0363-907X
IS - 2
ER -