Simulation and Measurement of Energetic Performance in Decentralized Regenerative Ventilation Systems
| Autor: | Thibault Pflug, Lena Schnabel, Nicolas Carbonare, Nasir Asadov, Hannes Fugmann, Constanze Bongs |
|---|---|
| Přispěvatelé: | Publica |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Control and Optimization
Modelica Hydraulic engineering Computer science 020209 energy medicine.medical_treatment Ceramic honeycomb 0211 other engineering and technologies Energy Engineering and Power Technology Thermische Systeme und Gebäudetechnik decentralized ventilation 02 engineering and technology computational fluid dynamics Computational fluid dynamics lcsh:Technology Automotive engineering law.invention ddc:690 law Heat recovery ventilation 021105 building & construction Heat exchanger Thermal 0202 electrical engineering electronic engineering information engineering medicine honeycomb heat exchanger Electrical and Electronic Engineering Buildings Engineering (miscellaneous) Mechanical ventilation Renewable Energy Sustainability and the Environment business.industry lcsh:T Simulation modeling Heat losses Energy consumption Energieeffiziente Gebäude Regenerative heat exchanger Ventilation (architecture) heat recovery business Lüftungs- und Klimatechnik Energy (miscellaneous) |
| Zdroj: | Energies, 13 (22), Art.-Nr.: 6010 Energies Volume 13 Issue 22 Pages: 6010 Energies, Vol 13, Iss 6010, p 6010 (2020) |
| ISSN: | 1996-1073 |
| Popis: | Decentralized regenerative mechanical ventilation systems have acquired relevance in recent years for the retrofit of residential buildings. While manufacturers report heat recovery efficiencies over 90%, research has shown that the efficiencies often vary between 60% and 80%. In order to better understand this mismatch, a test facility is designed and constructed for the experimental characterization and validation of regenerative heat exchanger simulation models. A ceramic honeycomb heat exchanger, typical for decentralized regenerative ventilation devices, is measured in this test facility. The experimental data are used to validate two modeling approaches: a one-dimensional model in Modelica and a computational fluid dynamics (CFD) model built in COMSOL Multiphysics®. The results show an overall acceptable thermal performance of both models, the 1D model having a much lower simulation time and, thus, being suitable for integration in building performance simulations. A test case is designed, where the importance of an appropriate thermal and hydraulic modeling of decentralized ventilation systems is investigated. Therefore, the device is integrated into a multizone building simulation case. The results show that including component-based heat recovery and fan modeling leads to 30% higher heat losses due to ventilation and 10% more fan energy consumption than when assuming constant air exchange rates with ideal heat recovery. These findings contribute to a better understanding of the behavior of a growing technology such as decentralized ventilation and confirm the need for further research on these systems. |
| Databáze: | OpenAIRE |
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