Calcium looping combustion (CaLC) is a new class of lowCO₂emission technologies for thermochemical conversion of carbonaceous fuels that can help achieve the emissions reduction targets set out in the Paris Agreement. Compared to mature CO₂ capture technologies, which cause net efficiency penalties higher than 7% points, CaLC results in a net efficiency penalty of 2.9% points. However, a thorough economic assessment of CaLC needs to be undertaken to evaluate its economic viability. The levelised cost of electricity is commonly used to assess the economic performance of clean energy systems. However, this method does not account for commercially important parameters, such as tax, interest, and depreciation charges. This study aimed to improve the reliability and accuracy of economic assessments of clean energy systems by implementing the net present value (NPV) approach. This approach was applied to assess the economic performance of two concepts of the CaLC-based power plant with either the conventional steam cycle (SC) or the supercritical CO₂ cycle (s-CO₂) for heat utilisation along with the bottom-up approach to total capital cost estimation. A parametric study for both concepts was also conducted to assess the impact of the key thermodynamic parameters on the economic performance. Although the s-CO₂ case with revised assumptions was shown to result in a 1%-point lower net efficiency compared to the SC case, its break-even cost of electricity was lower by 0.81 €/MWh. Further improvements of the techno-economic performance can be sought by optimisation of the s-CO₂ cycle structure.

钙循环燃烧（CaLC）是用于碳质燃料热化学转化的一类新的低CO ₂排放技术，可以帮助实现《巴黎协定》中规定的减排目标。与成熟的CO ₂相比捕集技术会导致净效率罚款高于7％点，CaLC导致净效率罚款为2.9％点。但是，需要对CaLC进行全面的经济评估，以评估其经济可行性。平准化的电力成本通常用于评估清洁能源系统的经济性能。但是，此方法不考虑商业上重要的参数，例如税金，利息和折旧费用。这项研究旨在通过实施净现值（NPV）方法来提高清洁能源系统经济评估的可靠性和准确性。该方法适用于评估采用传统蒸汽循环（SC）或超临界CO ₂的基于CaLC的发电厂的两个概念的经济性能。循环（s-CO ₂）进行热量利用，以及自下而上的方法来估算总的资本成本。还对这两个概念进行了参数研究，以评估关键热力学参数对经济绩效的影响。尽管显示出经过修改的假设的s-CO ₂案例比SC案例的净效率降低了1％，但其电力收支平衡成本却降低了0.81€/ MWh。可以通过优化s-CO ₂循环结构来寻求技术经济性能的进一步提高。