Solar collectors and photovoltaics as combined heat and power systems: A critical review

Kasaeian, Alibakhsh; Nouri, Giti; Ranjbaran, Parisa; Wen, Dongsheng

doi:10.1016/j.enconman.2017.11.064

Cited by 127 publications

(38 citation statements)

References 136 publications

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“…H ORTHO and H SUNSET are calculated using Equation (17), obtaining H ORTHO = 289.09 • and H SUNSET = 70.91 • . Table 1 shows the results obtained for each shadow of the three points (first and third) as shown in Figures 9 and 10.…”

Section: Case Study: Resultsmentioning

confidence: 99%

“…The thermal energy collected on the receiver of the concentrating solar systems is typically used to produce electricity through a conventional power block, in the commonly named concentrating solar power plants. Although the basic technology had been under development for about 140 years, solar thermal electricity (STE) on grid was not achieved until the 1980s [17].The parabolic-trough solar energy technology is the most tested and the cheapest large-scale solar energy technology available today for the use of thermal solar energy with different types of working fluids [18,19]. The improvements in these parabolic-trough systems are still far from complete.…”

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A Simplified Method to Avoid Shadows at Parabolic-Trough Solar Collectors Facilities

2020

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Renewable energy today is no longer just an affordable alternative, but a requirement for mitigating global environmental problems such as climate change. Among renewable energies, the use of solar energy is one of the most widespread. Concentrating Solar Power (CSP) systems, however, is not yet fully widespread despite having demonstrated great efficiency, mainly thanks to parabolic-trough collector (PTC) technology, both on a large scale and on a small scale for heating water in industry. One of the main drawbacks to this energy solution is the large size of the facilities. For this purpose, several models have been developed to avoid shadowing between the PTC lines as much as possible. In this study, the classic shadowing models between the PTC rows are reviewed. One of the major challenges is that they are studied geometrically as a fixed installation, while they are moving facilities, as they have a tracking movement of the sun. In this work, a new model is proposed to avoid shadowing by taking into account the movement of the facilities depending on their latitude. Secondly, the model is tested to an existing facility as a real case study located in southern Spain. The model is applied to the main existing installations in the northern hemisphere, thus showing the usefulness of the model for any PTC installation in the world. The shadow projected by a standard, the PTC (S) has been obtained by means of a polynomial approximation as a function of the latitude (Lat) given by S = 0.001 − Lat2 + 0.0121 − Lat + 10.9 with R2 of 99.8%. Finally, the model has been simplified to obtain in the standard case the shadows in the running time of a PTC facility.

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Section: Case Study: Resultsmentioning

confidence: 99%

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A Simplified Method to Avoid Shadows at Parabolic-Trough Solar Collectors Facilities

2020

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“…Technology/Temperature Modelling/Review Results Applications [10] PVT and CPVT Review Please refer to paper Electricity and heating [11] PVT/ACH/Bat/NGB (50-60°C) Energy, economic, environmental System payback time: 10.6-11.3 years Electricity, space heating and cooling [12] PTC/ORC and LF/ORC (Up to 400°C)…”

Section: Refmentioning

confidence: 99%

Design and Comparative Techno-Economic Analysis of Two Solar Polygeneration Systems Applied for Electricity, Cooling and Fresh Water Production

2019

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Two solar polygeneration systems were investigated for electricity, cooling and fresh water production. In the first scenario (LFPS), the linear Fresnel (LF) solar field was used as thermal source of the Organic Rankine Cycle (ORC), absorption chiller (ACH) and multi-effect desalination (MED) unit. In the second scenario (PVPS), photovoltaic (PV) panels were considered as the electricity source to supply the electricity load that is required for lighting, electrical devices, compression chiller (CCH) and reverse osmosis (RO) units. A techno-economic comparison was made between two scenarios based on the land use factor (F), capacity utilization factor (CUF), payback period, levelized cost of electricity (LCE), levelized cost of cooling energy (LCC) and levelized cost of water (LCW). The calculations were conducted for four different locations in order to determine the effect of solar radiation level on the LCE, LCC and LCW of systems in both scenarios. The results showed that the LCE and LCW of PVPS is lower than that of LFPS and the LCC of LFPS is lower than that of PVPS. Also, the payback period of LFPS and PVPS systems are obtained as 13.97 years and 13.54 years, respectively, if no incentive is considered for the electricity sale.

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“…Yousefi et al [42] carry out a multi-objective optimization of component sizing of a hybrid CCHP microgrid to meet the electric needs and the heating and cooling loads of an office building in Tehran. A critical review [43] states that it is very important to analyze how hybrid energy-systems can be used to decrease the energy consumption, but also to improve the economic and environmental operation in office buildings, as the authors intend to do in the present work.…”

Section: Literature Reviewmentioning

confidence: 99%

An Economic, Energy, and Environmental Analysis of PV/Micro-CHP Hybrid Systems: A Case Study of a Tertiary Building

et al. 2018

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Our present standard of living depends strongly on energy sources, with buildings being a primary focus when it comes to reducing energy consumption due to their large contribution, especially in tertiary buildings. The goal of the present study is to evaluate the performance of two different designs of hybrid systems, composed of natural gas engines and photovoltaic panels. This will be done through simulations in TRNSYS, considering a representative office building with various schedules of operation (8, 12, and 24 h), as well as different climates in Spain. The main contributions of this paper are the evaluations of primary energy-consumption, emissions, and economic analyses for each scenario. In addition, a sensitivity analysis is carried out to observe the influence of energy prices, as well as that of the costs of the micro-CHP engines and PV modules. The results show that the scenario with the conventional system and PV modules is the most profitable one currently. However, if electricity prices are increased in the future or natural gas prices are reduced, the scenario with micro-CHP engines and PV modules will become the most profitable option. Energy service engineers, regulators, and manufacturers are the most interested in these results.

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Solar collectors and photovoltaics as combined heat and power systems: A critical review

Cited by 127 publications

References 136 publications

A Simplified Method to Avoid Shadows at Parabolic-Trough Solar Collectors Facilities

A Simplified Method to Avoid Shadows at Parabolic-Trough Solar Collectors Facilities

Design and Comparative Techno-Economic Analysis of Two Solar Polygeneration Systems Applied for Electricity, Cooling and Fresh Water Production

An Economic, Energy, and Environmental Analysis of PV/Micro-CHP Hybrid Systems: A Case Study of a Tertiary Building

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