An overview of the use of solar chimneys for desalination

Applying the solar solid particles as heat carrier to enhance the solar-driven biomass gasification with dynamic operation power generation performance analysis

Polyimide/phosphorene hybrid aerogel-based composite phase change materials for high-efficient solar energy capture and photothermal conversion

100 kWe power generation pilot plant with a solar thermochemical process: design, modeling, construction, and testing

Performance analysis of a novel combined cooling, heating and power system with solar energy spectral beam splitting

To enhance the utilization efficiency of wind and solar renewable energy in industrial parks, reduce operational costs, and optimize the charging experience for electric vehicle (EV) users, this paper proposes a real-time scheduling strategy based on the “Dual Electricity Price Reservation—Surplus Refund Without Additional Charges Mechanism” (DPRSRWAC). The strategy employs a Gaussian Mixture Model (GMM) to analyze EV users’ charging and discharging behaviors within the park, constructing a behavior prediction model. It introduces reservation, penalty, and ticket-grabbing mechanisms, combined with the Interval Optimization Method (IOM) and Particle Swarm Optimization (PSO), to dynamically solve the optimal reservation electricity price at each time step, thereby guiding user behavior effectively. Furthermore, linear programming (LP) is used to optimize the real-time charging and discharging schedules of EVs, incorporating reservation data into the generation-side model. The generation-side optimal charging and discharging behavior, along with real-time electricity prices, is determined using Dynamic Programming (DP). In addition, this study explicitly considers the battery aging cost associated with V2G operations and proposes a benefit model for EV owners in V2G mode, thereby incentivizing user participation and enhancing acceptance. A simulation analysis demonstrates that the proposed strategy effectively reduces park operation costs and user charging costs by 8.0% and 33.1%, respectively, while increasing the utilization efficiency of wind and solar energy by 19.3%. Key performance indicators are significantly improved, indicating the strategy’s economic viability and feasibility. This work provides an effective solution for energy management in smart industrial parks.

Characteristics of cavitating flows in cryogenic pump units in a combined cycle power system based on liquefied natural gas and solar energy

Efficiency of solar energy utilization (Eu) and efficiency of solar energy conversion (Ec) were compared and studied for panicle-weight type genotypes developed at the Chugoku National Agricultural Experiment Station, leading cultivars produced in the Chugoku region, and highyielding types developed in other countries. Furthermore, efficiency rates in solar energy utilization and conversion gathered to date have been compared with efficiency rates obtained by this author. Eu ranges from 1.37 to 1.61%, with a high efficiency rate of more than 1.55% were recorded for panicle-weight types Chugoku 113, Chugoku 116 and Hoshiyutaka, Indica-type Tainung 68 and Miliyang 23, and Japonica type Nipponbare and Koganebare. The solar energy utilization rate for grain weight (Eu grain) ranged from 0.48 to 0.75%, with rate of 0.7% or higher for Chugoku 118, Hoshiyutaka, Miliyang 23, Nipponbare and Koganebare. Ec was as high as 2.98, 2.83 and 2.68% for Nipponbare, Hoshiyutaka and Chugoku 118, respectively. The high Ec rate for panicle-weight types is likely to be caused by high radiation absorption, due to high absorption of each genotype, and a high level of total integrated solar radiation. Radiation use efficiency (RUE) was 1.98 g/MJ, 1.97 g/MJ and 1.85 g/MJ for Hoshiyutaka, Nipponbare and Chugoku 118, respectively. The difference was not accepted in the genotypes used for the experiment. In order to raise Ec and RUE, a leaf inclination angle is large and a plant type with the light-intercepting characteristics and high LAI is an ideal. Furthermore, high-yielding productive capacity needs to maintain a high canopy absorption by maintaining the SPAD value of a leaf with the topdressing of a ripening period

Experimental investigation and feasibility analysis on a capillary radiant heating system based on solar and air source heat pump dual heat source

Experimental and Numerical Study on the Performance of Innovative Bifacial Photovoltaic Wall System

Experimental investigations of the performance of a solar-ground source heat pump system operated in heating modes

A new solar hybrid clean fuel-fired distributed energy system with solar thermochemical conversion

Performance investigation on an agricultural photovoltaic thermal system based on spectral separation

The combined cooling, heating, and power system is based on the principle of energy cascade utilization, which is conducive to reducing fossil energy consumption and improving the comprehensive utilization efficiency of energy. With the characteristics of a lower expansion ratio and larger recuperation of a supercritical carbon dioxide (SCO2) power cycle, a combined cooling, heating, and power (CCHP) system is proposed. The system is based on a SCO2 cycle and is driven by solar energy. The system is located in Qingdao and simulated by MATLAB/Simulink software (R2022b). Firstly, the thermodynamic performance of the CCHP system at the design condition is analyzed. The energy utilization efficiency of the CCHP system is 79.75%, and the exergy efficiency is 58.63%. Then, the thermodynamic, environmental, and economic performance analyses of the system under variable conditions are carried out. Finally, the solar multiple is optimized. The results show that the minimum levelized cost of electricity is 10.4 ¢/(kW·h), while the solar multiple is 4.8. The annual primary energy saving rate of the CCHP system is 85.04%, and the pollutant emission reduction rate is 86.05%, compared with the reference system. Therefore, an effective way to reduce environmental pollution and improve the utilization efficiency of solar energy is provided.

In order to improve the comprehensive utilization efficiency of solar energy, a V-trough concentrating and splitting agrivoltaic hybrid system (VCSPVA system) is proposed in this paper, which transmits the red and blue spectral bands to crop field for photosynthesis conversion and concentrates the other bands to the solar panels for photoelectric conversion. Then, the power generation is completed with sustaining the crop growth, while the overall utilization efficiency of solar energy is improved significantly. The influence of key parameters is studied in detail. Results show that by adjusting trough angles, more reflected radiation can be received by the solar panels, minimizing the energy loss of the system. Through mathematical model establishment, the energy, economic and carbon emission evaluations of the proposed system are carried out. Consequently, the VCSPVA system has the highest annual efficiency of 16.96%, which is 39.15% and 45.93% higher than that of the traditional agrivoltaic system and photovoltaic-only system, respectively. Meanwhile, the net present value and carbon emission mitigation are $758680.99 and 0.25 t·m−2·a−1, respectively, which demonstrates a competitive option for dual land use and a significant role in reducing greenhouse gas emissions.

This study presents a novel solar updraft tower power plant (SUTPP) system, which has been designed to achieve the simultaneous utilization of solar and wind energy resources in desert regions, in response to the pressing demand for sustainable and efficient renewable energy solutions. The aim of this research was to develop an integrated system that is capable of harnessing and converting these abundant energy sources into electrical power, thereby enhancing the renewable energy portfolio in arid environments. The methodology of this study involved the design and construction of a prototype SUTPP, comprising a 53 m high tower, a 6170 m2 collector, five horizontal-axis wind turbines, and a thermal energy storage layer made up of pebbles and sand. The experimental setup was meticulously detailed, and experiments were conducted to collect data on the system’s performance under various environmental conditions. Subsequently, three-dimensional numerical simulations were performed to explore the effects of ambient wind speed and solar radiation on the output power of the SUTPP. The results indicate that the output power of the system increases with the increase in ambient wind speed and solar radiation. The impact of solar irradiation on output power was observed to diminish as ambient wind speeds increased. Notably, as the inlet wind speed rose from 4 m/s to 12 m/s, the output power showed a substantial increase of 727%. The numerical simulations revealed that ambient wind speed has a more pronounced effect on power output compared to solar radiation. Furthermore, it was found that the influence of solar radiation is significant at low wind speeds, with its impact decreasing as wind speed increases. This research provides essential guidance for the design and engineering of highly efficient solar thermal energy utilization projects, representing a significant advancement in the field of renewable energy technology deployment in desert environments.