Simulation-Aided Development of a Compact Local Ventilation Unit with the Use of CFD Analysis

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F24%3A00376429" target="_blank" >RIV/68407700:21220/24:00376429 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1007/s12273-024-1183-9" target="_blank" >https://doi.org/10.1007/s12273-024-1183-9</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s12273-024-1183-9" target="_blank" >10.1007/s12273-024-1183-9</a>

Result language

angličtina

Original language name

Simulation-Aided Development of a Compact Local Ventilation Unit with the Use of CFD Analysis

Original language description

Insufficient fresh air supply due to the increased air tightness of building envelopes after building renovations and window upgrades is a major concern of HVAC engineering today. The paper demonstrates the application of CFD simulations in the development of a compact decentralised ventilation unit with integrated heat recovery system for local ventilation of rooms, targeting this common issue. The device houses an innovative cyclically rotating recuperative heat exchanger, allowing effective condensate removal and de-icing in winter for its independent operation throughout the year. The paper introduces the ventilation unit, describes preparation of its numerical models, and approaches CFD simulation using ANSYS Fluent software. The initial design of the device was improved following the findings of the numerical analysis and the proposed adjustments were tested through follow-up CFD simulations, confirming that the desired outcomes were achieved. A separate CFD analysis was performed to assess the use of different air supply elements at the air outlet to the room, recommending the use of adjustable nozzles. A prototype ventilation unit was manufactured and the volume flow rate under different operating conditions was measured to be compared with the simulation results. The outcome of the research is a new type of compact local ventilation unit. An increase in device efficiency was achieved, with the aid of simulations, while maintaining its compact size. In addition to presenting the potential of using variant CFD analysis in the development of new HVAC equipment, the paper also indicates the drawbacks of using the Multiple Reference Frame (MRF) method to approximate the rotation of radial fan impellers in CFD simulations.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20101 - Civil engineering

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Building Simulation

ISSN

1996-3599

e-ISSN

1996-8744

Volume of the periodical

17

Issue of the periodical within the volume

12

Country of publishing house

CN - CHINA

Number of pages

15

Pages from-to

2233-2247

UT code for WoS article

001324502700001

EID of the result in the Scopus database

2-s2.0-85205440723