Energy value (caloric value): 3.6 yuan per million kJ
Thread Content
Today, while reading the \"Chemical Engineering Design Handbook,\" I found that the energy price (thermal value) is 3.6 yuan per 10*million kJ. At the current coal price, it is 1,000 yuan per ton. Calculating based on 7,000 kcal, the price comes to 3.6 yuan; this corresponds to 3.6 kg of coal, and thus 3.6*7,000*4.18 = 1.05*105. This is 10 times higher than the energy value listed in the chemical engineering design manuals. Was the price of coal at that time only 100 yuan? Given the current price levels, has the price already increased quite a bit? By how much? Is it in the cost calculation manual?
Actually, this is determined by the price of the original energy source; for example, the energy cost is calculated based on 5,000 kcal of raw coal at 1,000 yuan per ton. The coal-to-heat conversion efficiency is assumed to be 90%. The energy value of 1 GJ = 109 J / (5000 kcal/kg × 4186 J/kcal × 0.9) × 1 yuan/kg = 53.09 yuan, that is, 53.09 yuan per GJ