替代能源发展面临的九大挑战——规模和时间、商业化生产、可替代性、资源投入、间歇性、能量密度、水资源、滚动时域定律、能源投资回报率

Alternative Energy Development Faces Nine Challenges ---Scale and time, commercialized production, substitutability, investment in resources, intermittency, energy density, water resource, rolling time domain law and return to energy investment

替代能源的发展受到多方面因素的影响，本文重点研究了其在规模和时间、商业化生产、可替代性、资源投入、间歇性、能量密度、水资源、滚动时域定律和能源投资回报率等9个方面所面临的挑战；指出替代能源是未来能源系统的骨干，其发展不能仅仅只讨论货币成本，还应考虑到其所需的能源和资源投入等引发的潜在的可行性、可扩展性等复杂问题。同时，由于未来能源供应的限制，提醒人们需要更注意对能源需求的控制。

Alternative energy development is influenced by a number of factors. This article is focused on the challenges facing this sector in nine areas - scale and time, commercialized production, substitutability, investment in resources, intermittency, energy density, water resource, rolling time domain law and energy return on investment. It points out that alternative energy is the backbone in the future energy system. Discussion of alternative energy develop-ment should not be concentrated only on monetary cost but include such complicated issues as the potential feasibility and expandability triggered by investment in energy and resources. Meanwhile, it is necessary to control the energy demand thanks to the limited energy supply in the future.