Autors: Dimchev, I. N.
Title: Influence of internal and external air leakages on the real performance of an air handling unit with two-stage heat recovery
Keywords:

Abstract: The purpose of this study is to evaluate the influence of internal and external air leakages, which appears to be small but actually leads to a serious discrepancy between the theoretical and real performance of air handling units with two-stage heat recovery of the exhaust air. The results show that the overall efficiency of the air handling unit is up to 12.4% lower than theoretical for Class 3 equipment. With increasing airtightness, the efficiency of the AHU, expressed with COP, can be increased by about 3.2% as the class increases by one level.

References

  1. Vocale P. Morini G. Spiga M. 2014 Influence of Outdoor Air Conditions on the Air Source Heat Pumps Performance Paper presented at the Energy Procedía 45 653 662 10.1016/j.egypro.2014.01.070
  2. Dimchev I. 2023 Comparative analysis of the energy performance of an air handling unit with two-stage heat recovery operating in the different climatic zones of Bulgaria IOP Conference Series: Earth and Environmental Science 1234. 012012 10.1088/1755-1315/1234/1/012012
  3. EN 308:2022-Heat exchangers-Test procedures for establishing performance of air to air heat recovery components
  4. EN 16798-3:2017-Energy performance of buildings-Ventilation for buildings-Part 3: For non-residential buildings-Performance requirements for ventilation and room-conditioning systems (Modules M5-1, M5-4)
  5. Eurovent 2021 Air Leakages in Air Handling Units: Guidelines for Improving Indoor Air Quality and Correcting Performance
  6. Eurovent 2021 Air Handling Unit Guidebook 2
  7. Ivanov M. 2016 Reliability of the results from unplanned subjective assessment of the indoor air quality and thermal comfort parameters in small lecture room Paper presented at the Energy Procedia 85 295 302 10.1016/j.egypro.2015.12.255
  8. Roulet C.-A. Sultan Z. 2003 Applying Tracer Gas Technique for Measurements in Air Handling Units with Large Recirculation Ratio 536 541
  9. Roulet C.-A. Foradini F. Cretton P. 1994 Use of tracer gas for diagnostic of ventilation systems 521 526
  10. Amanowicz L. Ratajczak K. Dudkiewicz E. 2023 Recent Advancements in Ventilation Systems Used to Decrease Energy Consumption in Buildings-Literature Review Energies 16 4 1853 10.3390/en16041853
  11. Jankovic A. Gennaro G. Chaudhary G. Goia F. Favoino F. 2022 Tracer gas techniques for airflow characterization in double skin facades Building and Environment 212. 108803 10.1016/j.buildenv.2022.108803
  12. Szaianski P. Cepinski W. Sayegh M. 2023 Leakage in air handling units, the effects on the transmission of airborne infections Building and Environment 233. 110074 10.1016/j.buildenv.2023.110074
  13. Dimchev I. 2022 Two-stage heat recovery of the exhaust air in air conditioning systems. Doctoral thesis Technical University of Sofia. https://ras.nacid.bg/api/reg/FilesStorage?key=dfb01e0d-b22f-448d-8514-58707f47ee94&mimeType=application/pdf&fileName=IvanDimchev-PhD-Thesis-2022.pdf&dbId=1

Issue

IOP Conference Series: Earth and Environmental Science, vol. 1380, 2024, , https://doi.org/10.1088/1755-1315/1380/1/012015

Вид: публикация в международен форум, публикация в реферирано издание, индексирана в Scopus