In this project, we are designing an energy and water efficient hotel in Miami, Florida, by combining heat recovery and rainwater collection systems. The waste heat from space cooling is used to preheat the domestic hot water. The boilers for domestic hot water system also provide heat source for space heating when needed. The rainwater is collected, stored, and processed for non-potable usage, including cooling tower makeup water. Modelica, which is an equation based modeling language, is adopted to enable the fast modeling of the combined energy and water system as well as their controls.
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