Dynamic design model of displacement ventilation

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussavertaisarvioitu

Tutkijat

Organisaatiot

  • Nanjing Tech University

Kuvaus

An accurate temperature gradient calculation is essential for displacement ventilation (DV) system design, since it directly relates to the calculation of the required supply air flow rate. Inaccurate temperature prediction can cause the poor thermal comfort and w sizing of the ventilation and cooling systems. Several simplified nodal models were developed and implemented in the various building simulation software to estimate the temperature stratification in rooms with DV. Recent studies reveal that the multi-nodal models provide the most accurate temperature gradient prediction. However, the most building simulation software uses the air models with only one air node. The present study introduces the dynamic temperature gradient model for DV and investigates the effect of thermal mass on the temperature stratification. The model was validated with the experimental results of the lecture room with displacement ventilation. The room air temperature measurements were conducted during three weeks at 20 different heights. The supply air temperature and occupancy rate were recorded during each scheduled lecture. The developed dynamic nodal
model is able to accurately calculate the air temperatures in occupied zone. The effect of the thermal mass and varied heat loads on the indoor air temperature stratification is analysed for the lecture room with DV.

Yksityiskohdat

AlkuperäiskieliEnglanti
OtsikkoCLIMA 2019 Congress, 26th-29th May, 2019, Bucharest, Romania
TilaJulkaistu - 13 elokuuta 2019
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisuussa
TapahtumaREHVA World Congress - Bucharest, Romania
Kesto: 26 toukokuuta 201929 toukokuuta 2019
Konferenssinumero: 13

Julkaisusarja

NimiE3S Web of Conferences
KustantajaEDP Sciences
Vuosikerta111
ISSN (painettu)2555-0403

Conference

ConferenceREHVA World Congress
LyhennettäCLIMA
MaaRomania
KaupunkiBucharest
Ajanjakso26/05/201929/05/2019

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