Selected aspects of heat recovery simulation in houseboat installations

• Main Authors: Mroziński, Adam, Grela, Jakub, Łowisz, Maciej
• Format: Conference Proceeding
• Language: English
• Subjects: Drinking water; Floating houses; Greywater; Heat exchangers; Heat recovery; Heat recovery systems; Hot water heating; Residential buildings; Sanitation; Simulation; Wastewater
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0166343

Wastewater in a houseboat facility contains a large amount of heat energy that is irretrievably lost, so it is worth considering the possibilities of its recovery. It is estimated that in a typical residential building with full sanitation, approximately 70% of the total tap water supplied is discharged as gray water and can be reused. Heat recovery from wastewater can be carried out in many ways, it is influenced by various factors, including the location of the heat collection point from wastewater. The wide range of available technologies means that the market is full of many original and interesting solutions. The subject of the work is the possibility of recovering heat from wastewater as an alternative energy source for heating domestic hot water. The article presents an overview of solutions used in practice on the market, with particular emphasis on the possibility of their application in a houseboat facility. The article practically verifies the selected recovery system on a local scale (point recovery) at the selected facility-the so-called Drain Water Heat Recovery (DWHR). In the scope of analyzes, an original simulation tool was used, allowing to verify the effectiveness of the applied solution for various design and material variants of the exchanger. The conducted analyzes and simulations show that local systems of heat recovery from gray water allow for significant savings in the scope of heating domestic hot water, and the potential rate of return depends on the purpose of the facility and the type of installation. At the same time, the research shows that the design solutions of heat exchangers and internal installations in the analyzed facility in the form of a floating house (houseboat) should be adapted to the energy parameters of the flowing medium, which are the so-called gray waters.