论文部分内容阅读
(一)过去我国在进行水电工程经济评价中,一般都只采用静态法以计算工程的投资回收年限及投资效益系数。其相应计算公式为:投资回收年限T=∑K/(NB);投资效益系数a=1/T=(NB)/∑K式中∑K为工程投资,(NB)为年净效益。这种静态计算方法不符合实际情况(特别是工程投资改为贷款方式后)。近年来在大型工业企业(包括水电站)建设可行性研究的经济评价中,已广泛引用动态法,即考虑资金的时间价值(计及利率)及投资积压等因素的影响。笔者以前曾对装机容量利用小时进行过一定条件下的静态分析(见《农田水利与小水电》1980年第1期)。本文拟利用动态法进一步分析装机容量利用小时与投资回收年限之间的关系,他装机容量利用小时具有直观的经济意义。
(I) In the past, in the economic evaluation of hydropower projects in our country, only the static method was generally adopted to calculate the investment recovery period and the investment efficiency coefficient of the project. The corresponding calculation formula is as follows: Investment recovery period T = ΣK / (NB); Investment efficiency coefficient a = 1 / T = (NB) / ΣK Where ΣK is the project investment and (NB) is the annual net benefit. This static calculation method does not meet the actual situation (especially after the project investment to loans). In recent years, in the economic evaluation of the feasibility study of large-scale industrial enterprises (including hydropower stations), the dynamic method has been widely used, which considers the impact of the time value of funds (including interest rate) and the backlog of investment. The author previously conducted a static analysis of installed capacity utilization hours under certain conditions (see “Farmland Water Conservancy and Small Hydropower”, 1980, No. 1). This article intends to use the dynamic method to further analyze the relationship between the installed capacity utilization hours and investment recovery years, and his use of installed capacity has an intuitive economic significance.