Measurable energy savings of installing variable frequency drives for cooling towers’ fans, compared to dual speed motors

Al-Bassam, E.; Alasseri, Rajeev

doi:10.1016/j.enbuild.2013.07.081

Cited by 36 publications

(15 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The results of the analysis above show that the relevant performances of CWCT should be obtained by the model for a large domain of operation conditions. Meanwhile, input power model of CWCT is a function of spray water flow rate and air flow rate [19]. In combination with the simplified model, the input power model should indicate the quantitative relationship between energy flow rates and main input-output parameters of the tower.…”

Section: Extended Analysismentioning

confidence: 99%

RETRACTED: A Simplified Thermal Modelling of Cooling Tower for Optimization of HVAC Systems to Enhance Energy Efficiency

Agrawal¹,

Kaushik²,

Bhatti³

2015

OJAppS

View full text Add to dashboard Cite

Section: Extended Analysismentioning

confidence: 99%

RETRACTED: A Simplified Thermal Modelling of Cooling Tower for Optimization of HVAC Systems to Enhance Energy Efficiency

Agrawal¹,

Kaushik²,

Bhatti³

2015

OJAppS

View full text Add to dashboard Cite

“…The total power savings was based on the combined power of the chiller, the fan motor, and the energy cost of water production. Detailed system description and instruments installed are available in the article [2].…”

Section: Scope Of Workmentioning

confidence: 99%

The Impact of Installing Variable Frequency Drives for Cooling Towers in Kuwait on Energy Consumption

Al-Bassam

2015

2nd International Congress on Energy Efficiency and Energy Related Materials (ENEFM2014)

View full text Add to dashboard Cite

The application of Variable Frequency Drive (VFD) as a water and energy efficient control scheme for the operation of cooling towers (CTs) was experimentally verified using summer and winter season field data. A major concern during CT operation is the large flow of air required for cooler water temperatures that help in improving the performance of air-conditioning systems. However, this improved performance increases fan power and water consumption in dry and hot countries, such as Kuwait, due to the self-cooling property of air that results in additional water evaporation. The technical viability of VFDs for the CTs as a water and energy efficient device and to quantify the potential savings of water and electricity were experimentally verified using summer and winter season field data. The CT fans in the selected site, originally fitted with dual speed motor, were retrofitted with VFDs. The site was adequately instrumented to assess energy and water consumption of the cooling production system while operating the CTs' fans with constant air flow alternatively either at low or high speed through the building management system (BMS), and the VFD scheme keeping the CT leaving water temperature constant. The results were in favor of selecting CT with VFD as the best option to reduce electricity and water consumption.

show abstract

“…In that regard, an Airwell brand water-water chiller (Model CWP 09 CO) has been selected to meet the building requirements, with a cooling capacity of 33.7 kW. Nominal COP and capacity at current conditions are calculated as, COP nom = COP rated COP ratio (24) Q ch =Q ch,ratedQch,ratio (25) The chiller load is calculated by,…”

Section: Chiller (Type666)mentioning

confidence: 99%

“…The vapor loss is used to run a high capacity heat pump while the rest of the water is connected with a heat exchanger that satisfies the demand of a house in Tunisia. Al-Bassam and Alasseri [25] compared experimentally the effect of installing variable frequency drives instead of dual speed fans in energy and water consumption savings in a cooling tower in Kuwait during the summer season. The results showed a reduction in water consumption of 13% and 5.8% in consumed energy by the fans and chiller for the same amount of cooling produced.…”

Section: Introductionmentioning

confidence: 99%

Optimum Design and Operation of an HVAC Cooling Tower for Energy and Water Conservation

2017

View full text Add to dashboard Cite

Abstract:The energy consumption increase in the last few years has contributed to developing energy efficiency policies in many countries, the main goal of which is decreasing CO 2 emissions. One of the reasons for this increment has been caused by the use of air conditioning systems due to new comfort standards. In that regard, cooling towers and evaporative condensers are presented as efficient devices that operate with low-level water temperature. Moreover, the energy consumption and the cost of the equipment are lower than other systems like air condensers at the same operation conditions. This work models an air conditioning system in TRNSYS software, the main elements if which are a cooling tower, a water-water chiller and a reference building. The cooling tower model is validated using experimental data in a pilot plant. The main objective is to implement an optimizing control strategy in order to reduce both energy and water consumption. Furthermore a comparison between three typical methods of capacity control is carried out. Additionally, different cooling tower configurations are assessed, involving six drift eliminators and two water distribution systems. Results show the influence of optimizing the control strategy and cooling tower configuration, with a maximum energy savings of 10.8% per story and a reduction of 4.8% in water consumption.

show abstract

Measurable energy savings of installing variable frequency drives for cooling towers’ fans, compared to dual speed motors

Cited by 36 publications

References 8 publications

RETRACTED: A Simplified Thermal Modelling of Cooling Tower for Optimization of HVAC Systems to Enhance Energy Efficiency

RETRACTED: A Simplified Thermal Modelling of Cooling Tower for Optimization of HVAC Systems to Enhance Energy Efficiency

The Impact of Installing Variable Frequency Drives for Cooling Towers in Kuwait on Energy Consumption

Optimum Design and Operation of an HVAC Cooling Tower for Energy and Water Conservation

Contact Info

Product

Resources

About