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(Solved): Measurements Assume a natural gas higher heating value of \( 38.6 \mathrm{MJ} / \mathrm{m}^{3} \). ...



Measurements
Assume a natural gas higher heating value of \( 38.6 \mathrm{MJ} / \mathrm{m}^{3} \).
Calculations
Draw a heat

Measurements Assume a natural gas higher heating value of \( 38.6 \mathrm{MJ} / \mathrm{m}^{3} \). Calculations Draw a 'heat (and mass) balance' diagram' and a 'Sankey' diagram' for the CHP unit. Calculate the net electrical and thermal efficiencies and hence determine the overall efficiency, the heat-to-power ratio and the air-fuel ratio. \( { }^{1} \) UK Microgeneration Part II: Technology Overviews, Proceedings of the ICE - Energy, November 2010 2 "Heat (and mass) balance" diagram reports pressure, temperature and mass flow rate for each state point. \( { }^{3} \) Sankey diagrams are a specific type of flow diagram, in which the width of the arrows is shown proportionally to the flow quantity (i.e. energy). Sankey diagrams are typically used to visualise energy transfers between processes.


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Heat and Mass Balance Unit OperationStored Materials ms1ms2ms3Stored EnergyRaw materials in ES1ES2ES3 mR1mR2mr3Heat in Energy, work, chemical, electri
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