Thermodynamics
Introduction To Chemical Engineering Thermodynamics Seventh Edition By J.M. Smith, H.C. Van Ness, and M.M. Abbott. Problems 1.22 Energy cost vary greatly with energy source: coal @ $25.00/ton, gasoline @ a pump price of $2.00/gal, and electricity @ $0.1/kWh. Conventional practice is to put these on a common basis by expressing them in $/GJ. [A gigajoule is approximately 106(btu).] For this purpose, assume gross heating values of 29 MJ/kg for coal and 37 GJ/m3 for gasoline. Rank order the three energy sources with respect to energy cost in $/GJ. Explain the large disparity in numerical result of part (a). Discuss the advantages and disadvantages of the three energy sources. Given : Energy cost, Coal: $25/ton Gasoline: $2/gal Electricity: $0.1/kWh Gross heating value, Coal: 29MJ/kg Gasoline: 37GJ/m3 Asked : (a) Order energy cost with basis $/GJ. (b) Explain energy cost large disparity in numerical and discuss the advantages and disadvantages of the three energy...