A state-of-the-art review of solar air-conditioning systems

Nkwetta, Dan Nchelatebe; Sandercock, Jim

doi:10.1016/j.rser.2016.03.010

Cited by 42 publications

(16 citation statements)

References 81 publications

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“…The use of solar energy for cooling systems has been increasing for several decades spurred by the fact that the need for air conditioning is usually well correlated to high levels of solar radiation [6][7][8]. The plant used in this paper as a test-bench for control purposes is the solar cooling plant located on the roof of the Engineering School (ESI) of Seville [9,10].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Nonlinear MPC of a Solar Cooling Plant

et al. 2019

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Solar energy for cooling systems has been widely used to fulfill the growing air conditioning demand. The advantage of this approach is based on the fact that the need of air conditioning is usually well correlated to solar radiation. These kinds of plants can work in different operation modes resulting on a hybrid system. The control approaches designed for this kind of plant have usually a twofold goal: (a) regulating the outlet temperature of the solar collector field and (b) choosing the operation mode. Since the operation mode is defined by a set of valve positions (discrete variables), the overall control problem is a nonlinear optimization problem which involves discrete and continuous variables. This problems are difficult to solve within the normal sampling times for control purposes (around 20–30 s). In this paper, a two layer control strategy is proposed. The first layer is a nonlinear model predictive controller for regulating the outlet temperature of the solar field. The second layer is a fuzzy algorithm which selects the adequate operation mode for the plant taken into account the operation conditions. The control strategy is tested on a model of the plant showing a proper performance.

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Section: Introductionmentioning

confidence: 99%

Hybrid Nonlinear MPC of a Solar Cooling Plant

et al. 2019

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“…In SHC systems, the thermal energy generated by solar collectors may be directly used for space heating, producing domestic hot water or supplied to absorption chillers for cooling [5,6]. To ensure continuous and stable operation of the system, thermal energy storage system or back-up energy source is usually considered [7].…”

Section: Introductionmentioning

confidence: 99%

Mathematical modeling and performance analysis of an integrated solar heating and cooling system driven by parabolic trough collector and double-effect absorption chiller

Zheng

Shi

Wang

et al. 2019

Energy and Buildings

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With the increasing concerns on energy conservation and environmental protection, solar heating and cooling (SHC) system represents an attractive candidate in building sector. In this paper, an integrated SHC system driven by parabolic trough collector (PTC) and double-effect H2O/LiBr absorption chiller was presented. The energy generated by solar collectors was supplied to the absorption chiller during the cooling period, and was directly used for space heating with the integration of plate heat exchanger during the heating period. The mathematical models of the whole system 2 including the collector, the double-effect absorption chiller and the plate heat exchanger were established and were validated by field tests. Based on the proposed models, comparison of the SHC system and the conventional gas-driven absorption heating and cooling system was carried out by case study. The annual performances as well as energetic, economic and environmental assessments of the proposed system were investigated. Results show that, 21.3% of the primary energy consumption and 18.8% of the CO2 emission can be reduced in SHC system. Therefore, the proposed integrated solar heating and cooling system has a promising application prospect in sustainable development in view of its considerable energy saving benefits, potential economic viability and environmental friendly characteristics.

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“…Solar heating and cooling do not work with environmentally hazardous refrigerants, such as chlorofluorocarbons (CFC) and hydrochlorofluorocarbons (HCFC). Noises and vibrations are reduced compared to the mechanical refrigerant vapor compression technologies (Díaz Torres et al, 2015;Nkwetta & Sandercock, 2016).…”

Section: Introductionmentioning

confidence: 99%

Refrigeración solar de edificaciones. Un estado del arte

Bravo

González

2018

Rev. ing. constr.

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Context: The use of solar energy, rather than an alternative, is the viable solution to the energy demands of our planet for sustainable development. Given the population increase and the quality of life at a global scale, it is very reasonable to forecast an increase in global energy demand. In this context, solar cooling systems are a viable and timely strategy to follow. Methods: This work offers a state of the art on the different methods of obtaining solar cold. The review is generated by using the tools offered by the Scopus directory and using the VOSviewer bibliometric analysis software. Results: Solar thermal cooling in buildings is shown as a trend within these energy practices, followed by photovoltaic solar cooling. Today, the United States of America, Italy, and China are the nations that lead this field. The most fertile research areas in this subject matter are engineering, energy and materials science. Conclusions: The next few years will be decisive for the development of solar cooling technologies since they depend on the incentives and promotion plans offered by those responsible for formulating environmental and energy efficiency policies for buildings.

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A state-of-the-art review of solar air-conditioning systems

Cited by 42 publications

References 81 publications

Hybrid Nonlinear MPC of a Solar Cooling Plant

Hybrid Nonlinear MPC of a Solar Cooling Plant

Mathematical modeling and performance analysis of an integrated solar heating and cooling system driven by parabolic trough collector and double-effect absorption chiller

Refrigeración solar de edificaciones. Un estado del arte

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