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Theoretical study of a novel intermediate temperature photovoltaic/thermal system equipped with heat pipe and evacuated tube (2024)
Journal Article
Ren, X., Dang, G., Gong, L., Li, J., Zhu, C., Duan, X., & Pei, G. (2024). Theoretical study of a novel intermediate temperature photovoltaic/thermal system equipped with heat pipe and evacuated tube. Applied thermal engineering, 248, part B, Article 123207. https://doi.org/10.1016/j.applthermaleng.2024.123207

Solar photovoltaic/thermal (PV/T) technology has enormous promise in the field of renewable cogeneration as a key technology to increase the utilization rate of solar energy. The structural restrictions of PV/T and the high power temperature coeffici... Read More about Theoretical study of a novel intermediate temperature photovoltaic/thermal system equipped with heat pipe and evacuated tube.

Performance investigation of a novel low-carbon solar-assisted multi-source heat pump heating system demonstrated in a public building in Hull (2023)
Journal Article
Li, Y., Li, Z., Song, Z., Fan, Y., Zhao, X., & Li, J. (2024). Performance investigation of a novel low-carbon solar-assisted multi-source heat pump heating system demonstrated in a public building in Hull. Energy Conversion and Management, 300, Article 117979. https://doi.org/10.1016/j.enconman.2023.117979

Global climate change has raised great attention from governments and prompted a wave of application of low-carbon heating technologies. However, solar-assisted heat pump, as an attractive technology, has challenges of unstable performance and comple... Read More about Performance investigation of a novel low-carbon solar-assisted multi-source heat pump heating system demonstrated in a public building in Hull.

Thermodynamic Investigation and Economic Evaluation of a High-Temperature Triple Organic Rankine Cycle System (2023)
Journal Article
Li, P., Shu, C., Li, J., Wang, Y., Chen, Y., Ren, X., …Liu, X. (2023). Thermodynamic Investigation and Economic Evaluation of a High-Temperature Triple Organic Rankine Cycle System. Energies, 16(23), Article 7818. https://doi.org/10.3390/en16237818

Triple organic Rankine cycle (TORC) is gradually gaining interest, but the maximum thermal efficiencies (around 30%) are restricted by low critical temperatures of common working fluids (<320 °C). This paper proposes a high-temperature (up to 400 °C)...

Thermodynamic and techno-economic analysis of a direct thermal oil vaporization solar power system (2023)
Journal Article
Li, P., Ye, J., Li, J., Wang, Y., Jiang, X., Qian, T., …Liu, X. (2023). Thermodynamic and techno-economic analysis of a direct thermal oil vaporization solar power system. Energy, 282, Article 128963. https://doi.org/10.1016/j.energy.2023.128963

A unique direct thermal oil vaporization solar power system employing cascade organic-steam Rankine cycle is proposed. The oil is a mixture of biphenyl and diphenyl oxide, and it is used for heat transfer, storage and power cycle fluid in the novel s... Read More about Thermodynamic and techno-economic analysis of a direct thermal oil vaporization solar power system.

A novel solar-driven Organic Rankine Cycle system based on the two-stage solar thermal collection and accumulation (2023)
Journal Article
Gao, D., Li, J., Hao, Y., & Pei, G. (2023). A novel solar-driven Organic Rankine Cycle system based on the two-stage solar thermal collection and accumulation. Applied thermal engineering, 234, Article 121249. https://doi.org/10.1016/j.applthermaleng.2023.121249

Solar thermal power has attracted much attention because it is instrumental to solar energy storage and power grid peak shaving. Among the various solar thermal power technologies, the Organic Rankine Cycle stands out as a prevalent choice for low an... Read More about A novel solar-driven Organic Rankine Cycle system based on the two-stage solar thermal collection and accumulation.

Simulation and economic analysis of an innovative indoor solar cooking system with energy storage (2023)
Journal Article
Zhou, C., Wang, Y., Li, J., Ma, X., Li, Q., Yang, M., …Zhu, Y. (2023). Simulation and economic analysis of an innovative indoor solar cooking system with energy storage. Solar Energy, 263, Article 111816. https://doi.org/10.1016/j.solener.2023.111816

Solar energy technology and energy storage technology are promising to make a contribution to current energy and global climate issue. The energy demand of daily cooking is enormous, and conventional cooking methods use gas or electricity with large... Read More about Simulation and economic analysis of an innovative indoor solar cooking system with energy storage.

Eco-economic performance and application potential of a novel dual-source heat pump heating system (2023)
Journal Article
Li, Y., Cui, Y., Song, Z., Zhao, X., Li, J., & Shen, C. (2023). Eco-economic performance and application potential of a novel dual-source heat pump heating system. Energy, 283, Article 128478. https://doi.org/10.1016/j.energy.2023.128478

Decarbonization of building heating is the key to carbon neutrality. Heat pumps have great potential to replace non-renewable heating devices, thus creating economic and renewable heating systems. To overcome the application challenges of conventiona... Read More about Eco-economic performance and application potential of a novel dual-source heat pump heating system.

The Energy-Saving Potential of Air-Side Economisers in Modular Data Centres: Analysis of Opportunities and Risks in Different Climates (2023)
Journal Article
Badiei, A., Jadowski, E., Sadati, S., Beizaee, A., Li, J., Khajenoori, L., …Xiao, X. (2023). The Energy-Saving Potential of Air-Side Economisers in Modular Data Centres: Analysis of Opportunities and Risks in Different Climates. Sustainability, 15(14), Article 10777. https://doi.org/10.3390/su151410777

This study examines the feasibility of utilising outside air for ‘free cooling’ in modular data centres through the implementation of an air-side economiser, as an alternative to traditional mechanical cooling systems. The objective is to offset the... Read More about The Energy-Saving Potential of Air-Side Economisers in Modular Data Centres: Analysis of Opportunities and Risks in Different Climates.

Hydrogen-based combined heat and power systems: A review of technologies and challenges (2023)
Journal Article
Yu, S., Fan, Y., Shi, Z., Li, J., Zhao, X., Zhang, T., & Chang, Z. (2023). Hydrogen-based combined heat and power systems: A review of technologies and challenges. International Journal of Hydrogen Energy, https://doi.org/10.1016/j.ijhydene.2023.05.187

This article comprehensively reviews hydrogen-based Combined Heat and Power (CHP) systems as an ideal energy system for reducing environmental pollution and carbon emissions. Hydrogen has a heating value three times that of gasoline, and its lifecycl... Read More about Hydrogen-based combined heat and power systems: A review of technologies and challenges.

Toward an Optimum Design of an Amorphous Silicon Photovoltaic/Thermal System: Simulation and Experiments (2023)
Journal Article
Ren, X., Li, J., Liu, W., Zhu, C., Pei, G., & Gong, L. (2023). Toward an Optimum Design of an Amorphous Silicon Photovoltaic/Thermal System: Simulation and Experiments. Journal of Thermal Science, 32(3), 947-964. https://doi.org/10.1007/s11630-023-1813-z

Amorphous silicon photovoltaic/thermal (a-Si-PV/T) technology is promising due to the low power temperature coefficient, thin-film property, thermal annealing effect of the solar cells, and high conversion efficiency in summer. The design of a-Si-PV/... Read More about Toward an Optimum Design of an Amorphous Silicon Photovoltaic/Thermal System: Simulation and Experiments.

Thermo-economic analysis of a novel partial cascade organic-steam Rankine cycle (2023)
Journal Article
Li, P., Qian, T., Li, J., Lin, H., Wang, Y., Pei, G., …Liu, D. (2023). Thermo-economic analysis of a novel partial cascade organic-steam Rankine cycle. Energy Conversion and Management, 283, Article 116941. https://doi.org/10.1016/j.enconman.2023.116941

Conventional heat batteries and concentrated solar power systems adopt subcritical steam Rankine cycles (SRCs) to avoid the technical challenges of supercritical cycles. The water evaporation temperature of 310–337 °C and live steam pressure of 10–14... Read More about Thermo-economic analysis of a novel partial cascade organic-steam Rankine cycle.

Annual analysis of the photovoltaic direct-expansion heat pump assisted by double condensing equipment for secondary power generation (2023)
Journal Article
Song, Z., Ji, J., Zhang, Y., Li, Y., Li, J., & Zhao, X. (2023). Annual analysis of the photovoltaic direct-expansion heat pump assisted by double condensing equipment for secondary power generation. Renewable energy, 209, 169-183. https://doi.org/10.1016/j.renene.2023.03.059

Thermoelectric generation (TEG) converts heat directly into electricity based on temperature difference. Many studies on combining TEG with photovoltaics to convert waste heat into electricity to increase overall power generation have been conducted.... Read More about Annual analysis of the photovoltaic direct-expansion heat pump assisted by double condensing equipment for secondary power generation.

Experimental investigation of a novel two-stage heat recovery heat pump system employing the vapor injection compressor at cold ambience and high water temperature conditions (2023)
Journal Article
Li, Y., Li, Z., Fan, Y., Zeng, C., Cui, Y., Zhao, X., Li, J., Chen, Y., Chen, J., & Shen, C. (2023). Experimental investigation of a novel two-stage heat recovery heat pump system employing the vapor injection compressor at cold ambience and high water temperature conditions. Renewable energy, 205, 678-694. https://doi.org/10.1016/j.renene.2023.01.101

Heat pumps (HPs) are energy-efficient space heating devices that are key to global carbon reduction and carbon neutrality. However, current commercial HPs have performance issues in cold climates where space heating is needed most, including low COP... Read More about Experimental investigation of a novel two-stage heat recovery heat pump system employing the vapor injection compressor at cold ambience and high water temperature conditions.

Parametric and economic analysis of high-temperature cascade organic Rankine cycle with a biphenyl and diphenyl oxide mixture (2022)
Journal Article
Ren, X., Li, J., Pei, G., Li, P., & Gong, L. (2023). Parametric and economic analysis of high-temperature cascade organic Rankine cycle with a biphenyl and diphenyl oxide mixture. Energy Conversion and Management, 276, Article 116556. https://doi.org/10.1016/j.enconman.2022.116556

High-temperature organic Rankine cycle (ORC) systems have the potential to improve the heat-to-power conversion efficiency and expand the temperature range for heat recovery, heat battery and solar power generation. Restricted by the critical tempera... Read More about Parametric and economic analysis of high-temperature cascade organic Rankine cycle with a biphenyl and diphenyl oxide mixture.

A novel direct steam generation system based on the high-vacuum insulated flat plate solar collector (2022)
Journal Article
Gao, D., Li, J., Ren, X., Hu, T., & Pei, G. (2022). A novel direct steam generation system based on the high-vacuum insulated flat plate solar collector. Renewable energy, 197, 966-977. https://doi.org/10.1016/j.renene.2022.07.102

Process steam is an important product in the industrial sector but the traditional steam boiler will lead to tremendous fossil fuel consumption and carbon emissions. The non-concentrating solar collectors have a huge potential for process steam gener... Read More about A novel direct steam generation system based on the high-vacuum insulated flat plate solar collector.

Analysis of a direct vapor generation system using cascade steam-organic Rankine cycle and two-tank oil storage (2022)
Journal Article
Li, P., Lin, H., Li, J., Cao, Q., Wang, Y., Pei, G., …Zhao, Z. (2022). Analysis of a direct vapor generation system using cascade steam-organic Rankine cycle and two-tank oil storage. Energy, 257, Article 124776. https://doi.org/10.1016/j.energy.2022.124776

A direct vapor generation solar power system using cascade steam-organic Rankine cycle and two-stage oil tanks is proposed. It offers a significantly enlarged storage capacity due to the unique discharge operation mode. Synthetic oil Therminol® VP-1... Read More about Analysis of a direct vapor generation system using cascade steam-organic Rankine cycle and two-tank oil storage.

An innovative concentrated solar power system driven by high-temperature cascade organic Rankine cycle (2022)
Journal Article
Ren, X., Li, J., Gao, G., & Pei, G. (2022). An innovative concentrated solar power system driven by high-temperature cascade organic Rankine cycle. Journal of Energy Storage, 52, Article 104999. https://doi.org/10.1016/j.est.2022.104999

Direct steam generation (DSG) solar power systems eliminate synthetic oils and molten salts in the solar field and enable efficient heat collection. Commercial DSG solar plants usually have a steam generation temperature of 250–285 °C to reduce the t... Read More about An innovative concentrated solar power system driven by high-temperature cascade organic Rankine cycle.

Experimental investigation of a novel vertical loop-heat-pipe PV/T heat and power system under different height differences (2022)
Journal Article
Yu, M., Chen, F., Zhou, J., Yuan, Y., Fan, Y., Li, G., …Zheng, S. (2022). Experimental investigation of a novel vertical loop-heat-pipe PV/T heat and power system under different height differences. Energy, 254, Part A, Article 124193. https://doi.org/10.1016/j.energy.2022.124193

For a novel vertical solar loop-heat-pipe photovoltaic/thermal system, the height difference between evaporator and condenser plays an important role in the heat transport capacity, which has significant impact on the solar thermal efficiency and par... Read More about Experimental investigation of a novel vertical loop-heat-pipe PV/T heat and power system under different height differences.

A proof-of-concept study of a novel ventilation heat recovery vapour injection air source heat pump (2022)
Journal Article
Fan, Y., Li, J., Zhao, X., Myers, S., Cheng, Y., Yu, M., …Yu, S. (2022). A proof-of-concept study of a novel ventilation heat recovery vapour injection air source heat pump. Energy Conversion and Management, 256, Article 115404. https://doi.org/10.1016/j.enconman.2022.115404

Conventional air source heat pumps suffer from frosting in winter and consume a large amount of electricity for defrosting. Meanwhile, ventilation heat recovery is an important approach to energy saving in buildings. This paper conducts a proof-of-co... Read More about A proof-of-concept study of a novel ventilation heat recovery vapour injection air source heat pump.