Cooling load for the design of air terminals in a general non-uniform indoor environment oriented to local requirements

Chao Liang, Xiaoliang Shao, Arsen Krikor Melikov, Xianting Li*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

The indoor environment is usually non-uniform and only local air zones need to be controlled. Although the specific calculation method of cooling load for the occupied zone has been proposed, no general definition and calculation method of cooling load exists for non-uniform indoor environment oriented to the local air zone. Thus, a general cooling load oriented to the local air zone, called local cooling load (LCL), was proposed for the design of air terminals in a general non-uniform indoor environment. Two calculation procedures of LCL, namely Procedure CAV (constant air volume) and Procedure VAV (variable air volume), were introduced. Experiments were conducted to illustrate LCL in a climate chamber measuring 4.12 m × 2.89 m × 4.2 m. Twenty cases were numerically investigated to analyze the influences of different ventilation systems, heat source locations, and target zones on the LCL. The results show that the two calculation procedures lead to almost the same values of LCL. The LCL can be less than, equal to, or even greater than the conventional cooling load in the uniform indoor environment, depending on the three influencing factors. The concept of LCL can be used for the air volume and temperature difference design of terminals in non-uniform indoor environments oriented to local requirements.
Original languageEnglish
JournalEnergy and Buildings
Volume174
Pages (from-to)603-618
Number of pages16
ISSN0378-7788
DOIs
Publication statusPublished - 2018

Keywords

  • Local cooling load
  • Non-uniform indoor environment
  • Ventilation
  • Local air conditioning
  • Design of air terminal

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