天然气加气站的经济性分析

ECONOMIC ANALYSIS ON DIFFERENT NATURAL GAS STATIONS

建设天然气加气站成本很高,合理选择建站方式至关重要。根据工程经济学的观点,利用投资效果系数对不同天然气加气站的初始投资进行了折算,并引入费用年值法对不同加气站的经济性进行了分析。该方法物理意义直观,全面考虑初期投资和运行费用两种因素,避免了因不同方案中设备使用寿命各异而造成的计算不便。计算结果表明,LNG加气站和L-CNG加气站的费用年值分别仅为CNG加气站的30.5%和56.7%,3种建站方式中LNG加气站经济性最好,在一定条件下可优先建立LNG加气站。

The investment on building up a gas station is so high that it is economically essential to choose what kind of gas station to be built. In light of the concept from engineering economics, the initial investments on different gas stations have been calculated by use of the investment effect coefficient, and meanwhile their different economic efficiency analysis has also been discussed taking use of the annual-cost method. This method, quite illustrative from the aspect of physics, takes both the preliminary investment and operation fees into fully consideration. In this way, the calculation becomes easier than before due to different working lives of the equipments in different cases. The result shows that the annual-costs of LNG station and L-CNG station were 30.5% and 56.7% respectively of that of CNG station, which suggests that LNG station should be the most economical one among these three kinds of stations. That is why under certain conditions a LNG station will be first considered when building up a gas station.