Question

A natural gas-fired furnace in a Textile Plant is used to provide steam at 140 0C. At times of high demand, the furnace supplied heat to the steam at rate of 30 MJ/s. The plant also uses up to 6 MW of electrical power purchased from the local power company. The plant management is considering converting the existing process plant into a Cogeneration Plant to meet both their process-heat and power requirements. Your job is to come up with some designs. Designs based on a Steam Turbine are to be considered. Propose your design for the cogeneration plant complete with pressures and temperatures and mass flow rates. Show that the proposed design meets the power and process-heat requirements of the plant. Hints: Considering using e Rankine Cycle for your design. In designing t power plant use all possible design modification considering Feedwater Heater (Closed or Open) and Reheat for increasing efficiency and consider t 85% isentropic efficiency of the turbine as you have seen in Chapter 8. The steam is condensed by water and you need to calculate the mass flow needed and discuss where/how you would do this A. Estimate the fuel consumption B. Compare the costs of new design with the separate unit costs of furnace and required power. C. You must layout your calculation procedure in the report and explain design decisions as well as why you chose that boiler pressure, mass flow rate etc Please provide the following: a. Introduction to problem, b. Brief description of analysis, c. Final design recommendation including schematic, explanation, and performance in terms of fuel input required for each condition, d. Feasibility of design (i.e., its ability to meet the requirements)

Answer 1

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