Numerical and experimental investigation of the effect of air conditioning duct on the room temperature distribution and energy efficiency

Delavari, Abolfazl; Ghassabi, Ghodrat; Saffarian, Mohammad Reza

doi:10.1007/s40430-019-2133-9

Cited by 2 publications

(2 citation statements)

References 17 publications

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“…These studies focused on the air-cooled, water-cooled, and heat recovery systems. (A et al, 2020;Delavari et al, 2020) In addition, field studies have been carried out to evaluate the effectiveness of VRF systems. In 2018, EnergyPlus released the first version of its software that used a validated system curve-based model for modeling VRF systems.…”

Section: Vav Systemmentioning

confidence: 99%

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كفاءة الطاقة لأنظمة التكييف التقليدية في ظل تغير المناخ

غيث¹

2023

Journal of Engineering Sciences and Information Technology

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The energy used in a country's economy is very important to its development. Over the years, the electricity and ventilation consumption of buildings have increased. People's concerns about the quality of their indoor environment are also increasing. Most buildings have air conditioning and ventilation systems that are designed to provide an environment that’s comfortable and healthy for the occupants. This is done through the use of ventilation. In addition to improving the indoor air quality, it can also help prevent people from experiencing discomfort. Studies have shown that about 60% of office buildings' energy consumption is attributed to the use of air conditioning systems. These systems provide cool air to the spaces while keeping the temperature controlled. A VAV system can meet the health criterion and the IAQ by supplying enough fresh air to meet national standards. A conventional AC system requires a refrigeration plant and a network of pipes to deliver cold water to the spaces. Since air-cooled chiller systems have a flexible design, they are commonly used in commercial buildings. They can provide a cooling effect that's significantly higher than that of water-cooled units. Compared to water cooling systems, air-cooled units are more energy-efficient. This is because the head pressure control of the system ensures that the pressure is kept high. The use of air conditioning has been one of the biggest sources of electrical energy consumption worldwide. It has contributed over 10% of the total energy produced, and it contributes to the harmful effects of climate change. Climate change is a growing concern that will require the production and use of more air conditioning units. This has necessitated the development of a comprehensive research to address this issue.

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Section: Vav Systemmentioning

confidence: 99%

“…A typical variable-speed air conditioning system uses a frequency inverter to control the motor's rotation in order to provide the appropriate amount of air to each zone. This type of system also features an airside economizing function, which allows it to provide cooling when the weather conditions are favorable (Delavari et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

كفاءة الطاقة لأنظمة التكييف التقليدية في ظل تغير المناخ

غيث¹

2023

Journal of Engineering Sciences and Information Technology

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Evaluation of Smart Booster Fans and Dampers for Advanced Hvac Systems

Rezanejadzanjani¹,

O’Brien²

2021

Journal of Green Building

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There is potential to significantly reduce CO2 emissions by increasing the efficiency and reducing the duty cycle of HVAC systems by using smart booster fans and dampers. Smart booster fans fit in the vents within a home, operating quietly on low power (2W) to augment HVAC systems and improve their performance. In this study, a prototype duct system is used to measure and evaluate the ability for smart booster fans and dampers to control airflow to different vents for the purpose of increasing the efficiency of HVAC systems. Four case studies were evaluated: an HVAC system (1) without any fans or dampers, (2) with a fan installed in one vent, but without any dampers, (3) with dampers installed at the vents, but without any fans, and (4) with both fan and dampers installed. The results from both the experimental and numerical evaluation show that the smart booster fan and dampers can significantly improve the airflow at a vent that is underperforming. For example, the airflow at the last vent in a ducting branch was increased from 17 to 37 CFM when a smart booster fan was installed at this vent. Results from the numerical analysis show that for the case of an underperforming vent during the winter season the HVAC running time may be reduced from 24 hr/day to 5.6 hr/day. Furthermore, results from the numerical analysis show the HVAC running time is further reduced to 4.5 hr/day for cases 3 and 4.

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Numerical and experimental investigation of the effect of air conditioning duct on the room temperature distribution and energy efficiency

Cited by 2 publications

References 17 publications

كفاءة الطاقة لأنظمة التكييف التقليدية في ظل تغير المناخ

كفاءة الطاقة لأنظمة التكييف التقليدية في ظل تغير المناخ

Evaluation of Smart Booster Fans and Dampers for Advanced Hvac Systems

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