Exercise 13. For the integrated "green building" discussed here draw a process block diagram. Develop mass and energy balance models to determine if a planned office building can be designed to be self-sufficient in energy by using the algae based system. The planned office building has the following characteristics: Dimensions = width: 15m, length: 15m, height: 22m Electricity requirements =100kWhm2y1 Space heating requirement =70kWhm2y1 Hot water requirement =280Lh1 Wastewater generation =50Lh1 The algae system has the following characteristics: PBR panel thickness =25cm Algae biomass digestion efficiency =55% Algae biomass production rate =2.25gm2h1 Biogas yield =0.45m3kg1 biomass Biogas heating value =21MJm3 Biogas energy conversion into electricity generation efficiency =50% Biogas energy conversion into waste heat generation efficiency =35% Collected solar thermal heat =30kWhm2y1 Make rational assumptions. If there is excess heat available, consider geothermal storage. Assume that water is previously clarified in an adjacent plant and the algae system is used for nutrient disposal from wastewater (via anaerobic digestion) to avoid eutrophication (for the eutrophication potential impact refer to Chapter 4 , Life Cycle Assessment)