Energy modelling of district cooling system for new urban development

Chow, Tommy W. S.; Chan, Alfred; Yau, R.; Au, W.H.; Cheng, Vincent K.M.

doi:10.1016/j.enbuild.2004.04.002

Cited by 64 publications

(22 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consequently, DC pipes are generally larger compared with DH. A higher temperature difference may be used to lower the power consumption of the distribution pump, but this will increase the heat gains of the pipes . It is generally recommended to find optimal supply/return temperatures in order to optimize the efficiency of the generating cooling system and of the overall DC, as wrong temperature configuration may lead to an excessive energy consumption from the cooling system …”

Section: District Coolingmentioning

confidence: 99%

Solar district heating and cooling: A review

et al. 2017

View full text Add to dashboard Cite

Summary Both district heating and solar collector systems have been known and implemented for many years. However, the combination of the two, with solar collectors supplying heat to the district heating network, is relatively new, and no comprehensive review of scientific publications on this topic could be found. Thus, this paper summarizes the literature available on solar district heating and presents the state of the art and real experiences in this field. Given the lack of a generally accepted convention on the classification of solar district heating systems, this paper distinguishes centralized and decentralized solar district heating as well as block heating. For the different technologies, the paper describes commonly adopted control strategies, system configurations, types of installation, and integration. Real‐world examples are also given to provide a more detailed insight into how solar thermal technology can be integrated with district heating. Solar thermal technology combined with thermally driven chillers to provide cooling for cooling networks is also included in this paper. In order for a technology to spread successfully, not only technical but also economic issues need to be tackled. Hence, the paper identifies and describes different types of ownership and financing schemes currently used in this field.

show abstract

Section: District Coolingmentioning

confidence: 99%

Solar district heating and cooling: A review

et al. 2017

View full text Add to dashboard Cite

show abstract

“…In the same line, Chow [9] addresses the design of a distribution network by simulating energy demand for each building type using EnergyPlus [21] and analysing global system with TRNSYS software [22].…”

Section: Demand Characterizationmentioning

confidence: 99%

Energy Demand and Available Technologies Analysis for District Heating Cooling Applications in a Science and Technology Park (PTA) in a Mediterranean country

Zubizarreta¹,

Cejudo²,

Jiménez³

2011

Linköping Electronic Conference Proceedings

View full text Add to dashboard Cite

Abstract:The purpose of this paper is to present the results of the feasibility study for a district heating-cooling network to cover the energy demand in a Science and Technology Park under Mediterranean climate conditions. To evaluate the energy demand a bottom-up strategy has been followed: a building inventory has been carried out to define several building types according to use, envelope and glazing. Energy + has been used to obtain heating and cooling demand profiles for each building type and orientation. According to municipal development plans for PTA and forecast in business growth, the energy demand evaluation in a 10-years timeframe has been carried out.Most appropriate technologies has been analyzed and evaluated: Cogeneration (gas turbine and alternative internal combustion engines), biomass boiler and conventional technologies have been evaluated with TRNSYS to obtain consumption profiles, consumption rates, efficiency indicators and energy losses. Finally an economic analysis has been done to technologies in a 20 years period to evaluate technology that better economic results address.The main objective of this work is the promotion of the efficient and effective energy supply in areas with high energy consumption. DCH technology is widely used in the North of Europe and this paper try to demonstrate that this technology could be apply in Mediterranean areas successfully.

show abstract

“…There are several optimization methods that can effectively address these problems. 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.…”

Section: Introductionmentioning

confidence: 99%

“…Lu et al [7] provided some formulation and analysis based on global optimization technologies towards overall heating, ventilation, and air conditioning (HVAC) systems. For new urban development, Chow et al [8] predicted thermal demands and outlined an energy modelling methodology and decision approach to derive the most desirable scheme for a given project. Sheng and Duanmu [9] presented electricity consumption and economic analyses.…”

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

View full text Add to dashboard Cite

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.

show abstract

Energy modelling of district cooling system for new urban development

Cited by 64 publications

References 7 publications

Solar district heating and cooling: A review

Solar district heating and cooling: A review

Energy Demand and Available Technologies Analysis for District Heating Cooling Applications in a Science and Technology Park (PTA) in a Mediterranean country

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

Contact Info

Product

Resources

About