以往油气供应问题的研究多从最终能源总产出出发,没有考虑油气生产中的能源投入变化引起的能源净产出变化,而净能源产出才是最终被人类社会利用的能源总量。在对中国能源投入回报值(Energy Return on Investment,EROI)计算与中国未来油...以往油气供应问题的研究多从最终能源总产出出发,没有考虑油气生产中的能源投入变化引起的能源净产出变化,而净能源产出才是最终被人类社会利用的能源总量。在对中国能源投入回报值(Energy Return on Investment,EROI)计算与中国未来油气总产量预测的基础上,通过为中国油气开采业EROI未来走势设定不同情景,研究中国未来油气净产出。从总产量来看,未来中国油气总产量依然有较大潜力;而从净能源角度来看,油气总量的峰值与净能源的峰值并不重叠,油气总量的显性增高可能因为EROI的降低而造成实际上净能源的降低。因此,中国在关注未来油气总产量的同时,应密切关注油气开采业的EROI及净产量,以合理规划未来石油开采量,并积极寻找高EROI替代能源。展开更多
This paper presents the thermos-economic evaluation of a simple gas turbine (SGT) within the Niger Delta, Nigeria. Steady-state monitoring and direct collection of data from the 25 MW plant were performed including lo...This paper presents the thermos-economic evaluation of a simple gas turbine (SGT) within the Niger Delta, Nigeria. Steady-state monitoring and direct collection of data from the 25 MW plant were performed including logged data for a 12 months period. MATLAB software was used to model the various thermodynamic performance equations of the plants while net present value (NPV), internal rate of return (IRR), and Payback period (PBP) were used to model the economic concept of the plant performance. The thermodynamic analysis shows that for every 1℃ rise in the ambient temperature, the percentage power drop increases by 2.07%, thermal efficiency drops by 0.66%, and the specific fuel consumption increases by 0.93%. For every 1% drop in the power output, the percentage thermal efficiency drops by 0.79% for the given consideration. The economic analysis based on the performance reveals that the power shortages represent about 47.9% of the net power generated and the revenue worth of $4198741.60 is lost due to the inability of the plant to perform at its design point. The NPV value of $6434899.97 shows that the plant investment is viable for the period of twenty years of operation and the IRR on investment is determined to be 12.40% by a numerical approximation for the period, with a PBP of 8.5 years. This provides technical and economic details to plant operators and energy systems investors for decision making.展开更多
文摘以往油气供应问题的研究多从最终能源总产出出发,没有考虑油气生产中的能源投入变化引起的能源净产出变化,而净能源产出才是最终被人类社会利用的能源总量。在对中国能源投入回报值(Energy Return on Investment,EROI)计算与中国未来油气总产量预测的基础上,通过为中国油气开采业EROI未来走势设定不同情景,研究中国未来油气净产出。从总产量来看,未来中国油气总产量依然有较大潜力;而从净能源角度来看,油气总量的峰值与净能源的峰值并不重叠,油气总量的显性增高可能因为EROI的降低而造成实际上净能源的降低。因此,中国在关注未来油气总产量的同时,应密切关注油气开采业的EROI及净产量,以合理规划未来石油开采量,并积极寻找高EROI替代能源。
文摘This paper presents the thermos-economic evaluation of a simple gas turbine (SGT) within the Niger Delta, Nigeria. Steady-state monitoring and direct collection of data from the 25 MW plant were performed including logged data for a 12 months period. MATLAB software was used to model the various thermodynamic performance equations of the plants while net present value (NPV), internal rate of return (IRR), and Payback period (PBP) were used to model the economic concept of the plant performance. The thermodynamic analysis shows that for every 1℃ rise in the ambient temperature, the percentage power drop increases by 2.07%, thermal efficiency drops by 0.66%, and the specific fuel consumption increases by 0.93%. For every 1% drop in the power output, the percentage thermal efficiency drops by 0.79% for the given consideration. The economic analysis based on the performance reveals that the power shortages represent about 47.9% of the net power generated and the revenue worth of $4198741.60 is lost due to the inability of the plant to perform at its design point. The NPV value of $6434899.97 shows that the plant investment is viable for the period of twenty years of operation and the IRR on investment is determined to be 12.40% by a numerical approximation for the period, with a PBP of 8.5 years. This provides technical and economic details to plant operators and energy systems investors for decision making.
