Optimal maintenance planning for building energy efficiency retrofitting from optimization and control system perspectives

Wang, Bo; Xia, Xiaohua

doi:10.1016/j.enbuild.2015.03.032

Cited by 65 publications

(44 citation statements)

References 31 publications

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“…For the performance evaluation, Wang and Xia [9] proposed the Building Retrofitted Facilities Corrective Maintenance Planning (BRFCMP). The BRPCMP problem is a multi-objective problem.…”

Section: Figure 1 Wen Diagram (Adapted From [5])mentioning

confidence: 99%

A Proposed Framework for a Water-Energy Nexus in Water Treatment Plants

Maneenoon¹,

Phdungsilp²,

Vorarat³

et al. 2017

Topics in Economics, Business and Management (EBM)

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Energy and water are interlinking each other, especially in the water treatment systems. Energy is mainly used to operate the water treatment plant and to improve the water quality, including water transferring, water pumping, chemical feeding, clarifying, and filtering. The significant challenges of the waterworks authorities are how to produce efficiently and economically water supply and how to manage the limited resources like water and energy resources. The Water-Energy Nexus (WEN) is an integrated concept that considers both energy and water resources in a holistic perspective, so that it can manage the challenges in the optimal way. However, there are some research gaps in the literature. The existing body of knowledge cannot apply to study and analyze the WEN in a water treatment plant. This study aims to study and propose the WEN framework that can improve the performance of the water treatment system. The conceptual model of WEN in water treatment system can be evaluated in terms of the energy and economic performances. The developed WEN framework in this paper will be applied to a case study in Bangkok, Thailand for performance evaluation under different scenarios. IntroductionThe water supply is an important infrastructure of many activities, such as households, industrial activities, and services sector. Nowadays, the demand for high quality water is increasing. Water utilities need to provide water to meet the demand, as well as to support water-related activities. Most of the water authorities are facing many problems that affect to the quality and quantity of water, for instance water contamination, drought, and flooding. Accordingly, the authorities have to provide water resources that adequate to consumers and to improve the water quality following the national and international water standard, such as World Health Organization (WHO). To improve the quality of water, related water authorities require more resources and lead to extra expenses, for example chemical cost and electrical cost. In addition, these expenses are more increases when an operation is facing to drought or flooding. So, the main challenge is how to produce effectively and economically water supply to the users.The energy sector is also important to many economic sectors. Energy sector needs the water to produce the fuels, for example mining, extracting, and transportation. According to the fuel production, it can illustrate the interrelation between the water and energy. It is generally accepted that energy resources are limited because of the depletion of fossil fuels and the increasing of energy demand for economic activities. The inefficient use of energy should also be counted to the challenge of optimal water supply production. On the other hand, the water sector requires energy for its operation. Technically, this interconnection is socalled Water-Energy Nexus (WEN).Recently, the WEN is a growing research area in the literature. There is existing WEN framework based on the integrated conservation concept that c...

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“…For the performance evaluation, Wang and Xia [9] proposed the Building Retrofitted Facilities Corrective Maintenance Planning (BRFCMP). The BRPCMP problem is a multi-objective problem.…”

Section: Figure 1 Wen Diagram (Adapted From [5])mentioning

confidence: 99%

A Proposed Framework for a Water-Energy Nexus in Water Treatment Plants

Maneenoon¹,

Phdungsilp²,

Vorarat³

et al. 2017

Topics in Economics, Business and Management (EBM)

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“…However, domestic consumers are hardly aware of the direct and indirect benefits of the water-energy nexus savings at home [10], such as; energy savings for purifying water, utility pumping and corresponding CO 2 reduction [11], energy savings from the waste water purification and lower cost for potable water and waste water management [12]. Whilst most research in South Africa has concentrated on energy efficiency [13,14,15] and electrical demand side management [16,17,18], little attention has been given to water demand management and its effect on energy consumption [19,20].…”

Section: Introductionmentioning

confidence: 99%

Energy-water optimization model incorporating rooftop water harvesting for lawn irrigation

Wanjiru

Xia

2015

Applied Energy

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The management of energy and water is increasingly gaining attention among domestic end-users. In developing countries, potable water supply is unreliable leading to alternative strategies such as rooftop water harvesting (RWH), storage and pumping. Since urban garden irrigation is the highest outdoor water consumer, optimal scheduling is important to conserve energy and water over conventional lawn irrigation methods. A model to optimally control the lawn irrigation was developed with the simulation results showing 17.4% potential water savings when using water directly from municipal sources. With RWH of a 1-hr event with 1-mm rainfall from a 120-m 2 roof, the model can potentially save 23.4% of water and 73.8% in energy costs per day. Such savings are important in reducing the demand for existing water and energy sources as well as greenhouse emissions. Further, this paper looks into two strategies to maximize the pump's life through minimizing the maintenance cost.Keywords: buildings, energy, optimal scheduling, rooftop water harvesting, time-of-use tariff, water

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“…The MPC algorithm design is extensively explored in the past decades to suit complicated requirements [15]. At the current stage, the control objective from [4] is employed, which is a weighted sum of two optimization objectives: maximizing the aggregate energy savings and maximizing the internal rate of return (IRR) [16] for a retrofitting project over a pre-decided, finite time period, namely the sustainability period. Some constraints over a whole finite horizon, e.g., the targeted energy saving and the budget limit, can be involved in the MPO optimal control problem.…”

Section: Introductionmentioning

confidence: 99%

“…According to MIL-STD-721C [4], PM refers to all actions performed in an attempt to retain an item in a specified condition and CM involves the repairs and replacements against failures. Wang and Xia [4] proposed a control system interpretation of the corrective maintenance plan optimization in building energy efficiency retrofitting. However, incorporating the preventive maintenance into the control system framework remains unexplored.…”

Section: Introductionmentioning

confidence: 99%

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A Multistate-Based Control System Approach Toward Optimal Maintenance Planning

Wang

Xia

2017

IEEE Trans. Contr. Syst. Technol.

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Abstract-This paper incorporates the multi-state system into a control system approach to address the maintenance plan optimization problem. The maintenance plan focuses on the totality of a set of items. A building energy efficiency retrofitting context is employed, where the retrofitted items are categorized into several homogeneous groups. The homogeneous group population dynamics and the aggregate performance dynamics under the impacts of multistate deteriorations and maintenances are for-mulated as a control system model. Thereafter, the maintenance planning optimization is cast into an optimal control problem. An MPC based approach is employed to solve the optimal control problem with system uncertainties. A case study is conducted to illustrate the effectiveness of the present approach.Index Terms-Maintenance plan optimization, Multi-state system, Control system modelling, Model predictive control.

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Optimal maintenance planning for building energy efficiency retrofitting from optimization and control system perspectives

Cited by 65 publications

References 31 publications

A Proposed Framework for a Water-Energy Nexus in Water Treatment Plants

A Proposed Framework for a Water-Energy Nexus in Water Treatment Plants

Energy-water optimization model incorporating rooftop water harvesting for lawn irrigation

A Multistate-Based Control System Approach Toward Optimal Maintenance Planning

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