Abstract
This paper presents a recent status quo of HVAC airside design for the airconditioned spaces under holistic approach. The present review summarizes the current status, future requirements, and expectations. It has been found that, the experimental investigations should be considered in the new trend of energy investigations, not to merely to validate the numerical tools, but also to provide a complete database of the airflow characteristics in the airconditioned spaces. Based on this analysis and the vast progress of computers and associated software, the artificial intelligent technique is sought as a prominent competitor candidate to the experimental and numerical techniques. Finally, the researches that relate between the different designs of the HVAC systems and energy consumption should concern with the optimization of airside design as the expected target to enhance the indoor environment.
Highlights
This paper presents a recent status quo of HVAC airside design for the air-conditioned spaces under holistic approach
In attempts to adequately design an optimum HVAC airside system that furnishes comfort and air quality in the air-conditioned spaces with efficient energy consumption is a great challenge
Comfort conditions depend on the air distribution pattern and the air movement [8], but the effect of these factors can be considered close to the air quality more than the comfort level
Summary
In attempts to adequately design an optimum HVAC airside system that furnishes comfort and air quality in the air-conditioned spaces with efficient energy consumption is a great challenge. The totality of the effects of the heat sink and sources in the building and the technical building systems that are recoverable for space conditioning, are typically considered in the calculation of the thermal energy needs. As the technical building thermal systems losses depend on the energy input, which itself depends on the recovered system thermal sources, iteration might be required. The calculation procedure can be devised as follows: 1) Sub-system calculations are first performed as per prevailing standards and that will be followed by determination of the recoverable thermal system losses; 2) The recoverable thermal system losses are added to the other recoverable heat sources already included (e.g. solar and internal heat gains, recoverable thermal losses from lighting and/or other technical building systems like domestic hot water) in the calculation of the needs for heating and cooling; 3) Thermal energy needs for heating and cooling are recalculated; 4) Iterations are performed from step 1 until the calculated changes of the energy needs between two successive iterations are less than a defined limit (e.g. 1%) or stop calculations after a specified number of iterations; 5) Continue to calculate the difference between the energy at the start of the iterations and the end; these are the recovered system thermal losses
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