Full environmental life cycle cost analysis of concentrating solar power technology: Contribution of externalities to overall energy costs

摘要

The aim of this work is to investigate the use of Full Environmental Life Cycle Costing (FeLCC) methodology to evaluate the economic performance of a 50 MW parabolic trough Concentrated Solar Power (CSP) plant operating in hybrid mode with different natural gas inputs (between 0% and 30%). The analysis is based on a plant located in Southern Spain and includes current financial incentives for the promotion of renewable energies. The analysis also incorporates an estimation of external costs associated with atmospheric emissions on six categories: Human Health, Loss of Biodiversity, Local and Global Damage to Crops, Damage to Materials and Climate Change. In a scenario where the project is funded through equity, the life cycle internal costs of the plant operating with solar energy only represent 82.8 epsilon/MW h, while revenues from electricity sales amount to 85.7 epsilon/MW h, resulting in a net present value of 2.95 epsilon/MW h. Internal costs are attributable primarily to the purchase of materials and equipment incurred mainly during the Extraction and Manufacturing life cycle phase. In this scenario, external costs (calculated using CASES damage costs methodology) represent less than 2.6% of all the internal costs considered.