District Cooling 2,145,000 Combined RO-DC 3,345,000 Multiple Effect Distillation 1,846,154 District Cooling 2,145,000 Combined MED-DC 3,991,154 Capital cost for a typical RO plant is almost 65% of the MED plant with district cooling costs being identical for both desalination techniques. District cooling makes up in excess of 53% of the overall cost of the integrated MED system and in excess of 64% of the integrated RO system. As observed, the MED integrated district cooling has a higher estimated proportion of capital expenditure at 54.4% in comparison to RO which estimates at 45.6% depicting an increase of 8.80% between the two technologies respectively as illustrated in Figure 7. Fig.7 Proportion of capital expenditure per individual technology Having analyzed the power consumption and initial capital expenditure of the individual and coupled desalination technologies with district cooling along with the potential of waste heat recovery aspect for the MED related design, graphical results were established for the total operational costs over the typical system lifetime. Current tariff for industrial consumption from DEWA was considered at a value of $0.06 per kWh. Table 7 displays the total operational expenditure per individual and combined desalination and district cooling scheme. 7 Total operational costs per individual technology Technology Annual Operational Cost ($) Reverse Osmosis 89,352 District Cooling 133,502 Combined RO-DC 222,854 Multiple Effect Distillation 0 District Cooling 133,502 Combined MED-DC 133,502 With reference to Figure 8, the total cost of operation for combined desalination and district cooling is drawn involving waste heat recovery system. As observed, the total cost of MED integrated with district cooling is approximately 25% lower than the RO combined system. Fig.8 Proportion of operational costs per individual technology By utilizing the thermal waste from buildings, the cost of external power input from the MED plant is dropped to zero, (Electrical power is required for the seawater, chemical dosing, brined
District Cooling 2,145,000 Combined RO-DC 3,345,000 Multiple Effect Distillation 1,846,154 District Cooling 2,145,000 Combined MED-DC 3,991,154 Capital cost for a typical RO plant is almost 65% of the MED plant with district cooling costs being identical for both desalination techniques. District cooling makes up in excess of 53% of the overall cost of the integrated MED system and in excess of 64% of the integrated RO system. As observed, the MED integrated district cooling has a higher estimated proportion of capital expenditure at 54.4% in comparison to RO which estimates at 45.6% depicting an increase of 8.80% between the two technologies respectively as illustrated in Figure 7. Fig.7 Proportion of capital expenditure per individual technology Having analyzed the power consumption and initial capital expenditure of the individual and coupled desalination technologies with district cooling along with the potential of waste heat recovery aspect for the MED related design, graphical results were established for the total operational costs over the typical system lifetime. Current tariff for industrial consumption from DEWA was considered at a value of $0.06 per kWh. Table 7 displays the total operational expenditure per individual and combined desalination and district cooling scheme. 7 Total operational costs per individual technology Technology Annual Operational Cost ($) Reverse Osmosis 89,352 District Cooling 133,502 Combined RO-DC 222,854 Multiple Effect Distillation 0 District Cooling 133,502 Combined MED-DC 133,502 With reference to Figure 8, the total cost of operation for combined desalination and district cooling is drawn involving waste heat recovery system. As observed, the total cost of MED integrated with district cooling is approximately 25% lower than the RO combined system. Fig.8 Proportion of operational costs per individual technology By utilizing the thermal waste from buildings, the cost of external power input from the MED plant is dropped to zero, (Electrical power is required for the seawater, chemical dosing, brined