Caractéristiques de fonctionnement inhérentes et stabilité opérationnelle d’un système de conditionnement d’air à détente directe et à vitesse variable.
Inherent operational characteristics and operational stability of a variable speed direct expansion air conditioning system.
Auteurs : XIA Y., DENG S., CHAN M. Y.
Type d'article : Article
Résumé
Previous studies on the inherent operational characteristics of a variable speed (VS) direct expansion (DX) air conditioning (A/C) system at a fixed degree of refrigerant superheat (DS) setting without considering its operational stability have been conducted. Therefore, a follow-up study on the inherent operational characteristics of a VS DX A/C system considering its operational stability has been carried out and the study results are reported. Using an experimental VS DX A/C system, the inherent correlations between its output total cooling capacity (TCC) and equipment sensible heat ratio (E SHR) at different combinations of compressor speed and supply fan speed were studied and the unstable operating points of speed combinations under different DS settings and inlet air states identified. The experimental results suggested while different DS settings may not significantly influence the inherent correlations between TCC and E SHR, but did impact the operational stability. A lower DS setting would result in a larger unstable operating region. Furthermore, VS operation and different inlet air states to the DX evaporator also influenced the operational stability. A higher compressor speed or a lower supply fan speed, and a lower inlet air temperature or relative humidity would lead to a higher chance to instability.
Détails
- Titre original : Inherent operational characteristics and operational stability of a variable speed direct expansion air conditioning system.
- Identifiant de la fiche : 30021053
- Langues : Anglais
- Source : Applied Thermal Engineering - vol. 113
- Date d'édition : 25/02/2017
- DOI : http://dx.doi.org/10.1016/j.applthermaleng.2016.10.073
Liens
Voir d'autres articles du même numéro (24)
Voir la source
-
A new control approach for a direct expansion (...
- Auteurs : QI Q., DENG S.
- Date : 14/07/2008
- Langues : Anglais
- Source : 2008 Purdue Conferences. 19th International Compressor Engineering Conference at Purdue & 12th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
- Formats : PDF
Voir la fiche
-
Further study on the inherent operating charact...
- Auteurs : LI Z., XU X., DENG S., et al.
- Date : 05/2014
- Langues : Anglais
- Source : Applied Thermal Engineering - vol. 66 - n. 1-2
Voir la fiche
-
Inherent correlation between the total output c...
- Auteurs : XU X., XIA L., CHAN M., et al.
- Date : 09/2010
- Langues : Anglais
- Source : Applied Thermal Engineering - vol. 30 - n. 13
Voir la fiche
-
Using high-low capacity compressor to execute a...
- Auteurs : XU X. G., DENG S. M., CHAN M. Y.
- Date : 12/06/2009
- Langues : Anglais
- Source : Latest technologies in refrigeration and air conditioning: energy issues and climate change, new refrigerants, new European regulations, new plants, the cold chain. XIII European Conference: June 12-13, 2009, Milan.
- Formats : PDF
Voir la fiche
-
Feed-forward control for a direct-expansion air...
- Auteurs : DENG S. M., JAMES R. W.
- Date : 1994
- Langues : Anglais
- Source : Build. Serv. Eng. Res. Technol. - vol. 15 - n. 1
Voir la fiche