Q3) Three methods of supplying a 100 000 MJworkload and a 300 000 MJ heat load to a new shopping mall are tobe compared. Work in the form of electricity is available from theNational grid at 5c per MJ and heat in the form of hydr-carbon fuelis available at a cost of 2 cper MJ
The three methods are,
- Electricity purchased for both Heat load and work load,
- Using a 25% efficient fuel burning heat engine to supply workand a fuel fired furnace to supply the heat load.
- Using a 20% efficient fuel burning heat engine.to supply thework load and using heat rejected by the heat engine to supply theheat load.
Determine the most economical method of supplying therequirements of the Mall.Ă‚Â Ă‚Â Ă‚Â Ă‚Â Ă‚Â Ă‚Â
