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A platform for research: civil engineering, architecture and urbanism
Experimental development of the plate shower heat exchanger to reduce the domestic hot water energy demand
https://orcid.org/0000-0001-6599-9167
https://orcid.org/0000-0002-0284-7876
Highlights Prototype of a plate exchanger with 3 baffles for flow directing have been created. The efficiency of the new prototype in real operating conditions reaches up to 62 %. Efficiency rises up to 4% for vertical position of 6 mm above the casing bottom. Height of the exchanger casing for installation has been minimised to just 74 mm. Heat energy savings for a family house are up to 300 kWh/a for proposed prototype.
Abstract The article describes an experimental development of a new prototype of the horizontal plate shower exchanger for wastewater heat recovery. The prototype is designed so that while achieving the highest possible value of efficiency, it also respects the requirements of the spatial arrangement of the heat exchanger casing and, thus, allows an appropriate flow of wastewater on both sides of the heat transfer surface. At the same time, emphasis is placed on the smallest possible height of the heat exchanger casing with regard to the minimisation of the built-up space and the expected wastewater flow during the shower cycle. Experimental testing was performed according to the conditions meeting the certification criteria of the Passive House Institute, while for a given heat exchanger, the investigated flows and water temperatures, as well as the heat transfer efficiency of the new prototype was determined, reaching peak values of up to 62%. An energy analysis and derivation of the equation was also performed, according to which it is possible to determine the achieved heat savings in the preparation of domestic hot water from the heat transfer efficiency of the exchanger, including all heat losses of the system. With new prototype, heat savings more than 21% are achieved.
Experimental development of the plate shower heat exchanger to reduce the domestic hot water energy demand
https://orcid.org/0000-0001-6599-9167
https://orcid.org/0000-0002-0284-7876
Highlights Prototype of a plate exchanger with 3 baffles for flow directing have been created. The efficiency of the new prototype in real operating conditions reaches up to 62 %. Efficiency rises up to 4% for vertical position of 6 mm above the casing bottom. Height of the exchanger casing for installation has been minimised to just 74 mm. Heat energy savings for a family house are up to 300 kWh/a for proposed prototype.
Abstract The article describes an experimental development of a new prototype of the horizontal plate shower exchanger for wastewater heat recovery. The prototype is designed so that while achieving the highest possible value of efficiency, it also respects the requirements of the spatial arrangement of the heat exchanger casing and, thus, allows an appropriate flow of wastewater on both sides of the heat transfer surface. At the same time, emphasis is placed on the smallest possible height of the heat exchanger casing with regard to the minimisation of the built-up space and the expected wastewater flow during the shower cycle. Experimental testing was performed according to the conditions meeting the certification criteria of the Passive House Institute, while for a given heat exchanger, the investigated flows and water temperatures, as well as the heat transfer efficiency of the new prototype was determined, reaching peak values of up to 62%. An energy analysis and derivation of the equation was also performed, according to which it is possible to determine the achieved heat savings in the preparation of domestic hot water from the heat transfer efficiency of the exchanger, including all heat losses of the system. With new prototype, heat savings more than 21% are achieved.
Experimental development of the plate shower heat exchanger to reduce the domestic hot water energy demand
https://orcid.org/0000-0001-6599-9167
https://orcid.org/0000-0002-0284-7876
Highlights Prototype of a plate exchanger with 3 baffles for flow directing have been created. The efficiency of the new prototype in real operating conditions reaches up to 62 %. Efficiency rises up to 4% for vertical position of 6 mm above the casing bottom. Height of the exchanger casing for installation has been minimised to just 74 mm. Heat energy savings for a family house are up to 300 kWh/a for proposed prototype.
Abstract The article describes an experimental development of a new prototype of the horizontal plate shower exchanger for wastewater heat recovery. The prototype is designed so that while achieving the highest possible value of efficiency, it also respects the requirements of the spatial arrangement of the heat exchanger casing and, thus, allows an appropriate flow of wastewater on both sides of the heat transfer surface. At the same time, emphasis is placed on the smallest possible height of the heat exchanger casing with regard to the minimisation of the built-up space and the expected wastewater flow during the shower cycle. Experimental testing was performed according to the conditions meeting the certification criteria of the Passive House Institute, while for a given heat exchanger, the investigated flows and water temperatures, as well as the heat transfer efficiency of the new prototype was determined, reaching peak values of up to 62%. An energy analysis and derivation of the equation was also performed, according to which it is possible to determine the achieved heat savings in the preparation of domestic hot water from the heat transfer efficiency of the exchanger, including all heat losses of the system. With new prototype, heat savings more than 21% are achieved.
Experimental development of the plate shower heat exchanger to reduce the domestic hot water energy demand
Vavřička, Roman (author) / Boháč, Jindřich (author) / Matuška, Tomáš (author)
Energy and Buildings ; 254
2021-09-30
Article (Journal)
Electronic Resource
English