Recently petroleum price has been rising both home and abroad and prices of LPG and LNG are continuous high, as a way of clean utilization of coal resource, coal gasifier begins to win fuel use enterprises’ attention because of its extra strong cost advantage.
        That how to calculate gas production cost in a fast and simple way so as to provide decision-making basis to decision makers is the first problem that must be solved, which is set before technical personnel who make investigation and study and unit selection.
        The following is a simple and practical reference formular, summed up by combining our experience in calculation in the past many years, which is for your information only.
1. Original data:
( 1 ) Gas productive rate of coal:(A) Nm3/kg coal
（2）Gas calorific value：(B) KJ/Nm3
（3）Coal price：(C)yuan/Kg
（4）Power rate：(D)yuan/Kw.h（mean reference value）
（5）Electricity demand：(E) Kw
（6）Power coefficient：0.8
（7）Number of workers in gas station：(F)person
（8）Average wage of workers:(X)yuan/day
（9）Equipment cost：(Y)yuan
2.Running cost accounting of gas station
（1）Actual gas demand：(Q) Nm3/hr
（2）Actual coal consumption：Q÷A=(G)Kg/hr
（3）Coal cost：G×C=(H)yuan/hr
（4）Power charge：（E×0.8）×D=(K)yuan/hr
（5）Water, steam and administrative expense（take 2% of coal cost and power charge 2%）:（H+K）×2%=(M)yuan/hr
（6）Labor cost：（X÷24）×F=(N)yuan/hr
（7）Equipment depreciation（depreciation period: 10years）：Y÷（365×10×24）=(R)yuan/hr
（8）Total cost of gas production per hour：H+K+M+N+R=(T)yuan/hr
（9）Gas cost /Nm3：T÷Q=(V)yuan/Nm3
（10）Gas cost /KJ：V÷B=(W)yuan/KJ