Energy efficiency in pumps

Kaya, Durmuş; Yagmur, E. Alptekin; Yiğit, Kadri Süleyman; Kılıç, Fatma Çanka; Eren, Ayşen; Celik, Cenk

doi:10.1016/j.enconman.2007.11.010

Cited by 147 publications

(53 citation statements)

References 7 publications

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“…In a typical high-rise water supply system, a pipe pressure drop from P L,0 to P L,1 corresponding to a flow rate from v 0 to v 1 due to the number of showerheads connected can be approximated by Equation (10), where P L /L e = 0.1-0.5 kPa m −1 with an equivalent pipe length range L e = 100-300 m [22,23].…”

Section: Simulationsmentioning

confidence: 99%

“…Better water delivery system designs, such as employing energy efficient pumps and adopting effective maintenance and replacement schedules, are proven to reduce energy use and thus CO 2 emissions [10,11]. A study reported that energy consumed by many existing high-rise water supply systems could be reduced by up to 50% via water storage tank relocations [12].…”

Section: Introductionmentioning

confidence: 99%

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Carbon Dioxide Reduction Targets of Hot Water Showers for People in Hong Kong

Wong

Mui

Zhou

2017

Water

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Improving water and energy efficiency in buildings is one of the best ways to reduce greenhouse gas emissions. This study examines various energy-related carbon dioxide (CO 2 ) reduction measures, including the use of water efficient showerheads and shower drain water heat recovery, in order to distinguish the significance of user influence on the water usage of a shower. The probability of taking a hot shower and the number of showers taken by an occupant per day, which can be evaluated from open literature data, are used as the parameters of user responses to water conservation measures in this study. A Monte Carlo model of water consumption and CO 2 reduction for showering is adopted to determine the contributions of user responses. The results demonstrate that the influence of users on CO 2 reduction is significant and compatible to the influence of water efficient showerheads. This study can be used as a reference to enhance water and energy incentives and to facilitate continuous improvement in building water systems.

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Section: Simulationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Carbon Dioxide Reduction Targets of Hot Water Showers for People in Hong Kong

Wong

Mui

Zhou

2017

Water

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“…It has been shown that using VSDs is mostly the best solution in many applications such as agricultural buildings (Teitel et al 2008) to energy saving and reduction of energy losses (Kaya et al 2008). In addition, among all of the successful methods and strategies managers have for minimizing the energy costs is the use of VSDs (Tolvanen 2008).…”

Section: Drive Lossesmentioning

confidence: 99%

Theoretical and experimental aspects of saving energy in fans

Dizadji

Mahmoudkhani

Nouri

2012

Int. J. Environ. Sci. Technol.

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This study presents energy efficiency measures in fans as an important energy consumption facility in the industry and common usages by identifying the sources of energy loss and applying methods to reduce those losses, which are one of the critical issues in protecting the environment and in global warming. The carbon footprint can be lowered by reducing the energy consumption of a fan over its life cycle. The main sources of energy loss in fans such as noise, vibration, lubrication, temperature of the bearings, installation type, damper and filter, especially pulley and belt system compared to electrical variable speed drive, are theoretically and experimentally discussed. The laboratory results show that the mechanical variable speed drive is one of the critical sources of energy loss in centrifugal fans. The results also show that by changing the drive with an electrical variable speed drive, the energy usage can be substantially optimized. For instance, using an electrical variable speed drive has reduced the energy loss up to 38.5 % with regard to the speed and according to the different flow rates. Moreover, based on the results derived from the equations and figures, it can be concluded that a considerable amount of energy per year, as well as the related cost can be saved and this shall be noted particularly in industrial applications.

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“…These methods are the analytical approach [6][7][8][9], direct search method [10], linear quadratic programming [11], nonlinear programming method [12], heuristic optimization algorithm [3,13,14], and artificial neural networks [15]. Kaya et al [6] analysed the influence factors of the effectiveness in pumps and presented an approach for improvement. By using measured data, the potential energy saving opportunities, investment costs, and payback periods are calculated.…”

Section: Introductionmentioning

confidence: 99%

A Hybrid Dynamical Modelling and Control Approach for Energy Saving of Central Air Conditioning

Yan

Liu

2018

Mathematical Problems in Engineering

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Currently in China, energy conservation and emission reduction are important initiatives for society. Because of its large proportion of building energy consumption, several methods for building energy conservation have been introduced for central air conditioning. This paper presents a hybrid system for a modelling and control approach. By analysing the cooling capacity transfer process and the electromagnetic properties of pumps, the modelling is performed in a hybrid system framework. Pumps are classified as fixed-frequency pumps, variable-frequency pumps, and switchable pumps; a switch control strategy is used in the chilled water system for supplying cooling capacity. In order to adjust indoor temperature and save electrical energy, the cooling capacity allocation and average temperature methods are presented, which satisfy the goal of optimal control of real-time energy consumption. As a numerical example, the temperature variation and cold regulation processes are simulated. Three rooms are the control objects that lower the setting points, and pumps waste as little electrical energy as possible. The results show 49.4% of water pump power consumption when compared with constant water volume technology. The modelling and control approach is more advantageous in ensuring the success of reconstruction projects for central air conditioning.

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Energy efficiency in pumps

Cited by 147 publications

References 7 publications

Carbon Dioxide Reduction Targets of Hot Water Showers for People in Hong Kong

Carbon Dioxide Reduction Targets of Hot Water Showers for People in Hong Kong

Theoretical and experimental aspects of saving energy in fans

A Hybrid Dynamical Modelling and Control Approach for Energy Saving of Central Air Conditioning

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