PapersFlow Research Brief
Solar Thermal and Photovoltaic Systems
Research Guide
What is Solar Thermal and Photovoltaic Systems?
Solar thermal and photovoltaic systems are technologies that harness solar energy through thermal collectors for heat generation and photovoltaic cells for electricity production, often integrated in hybrid configurations to improve efficiency via energy and exergy analysis.
This field encompasses 74,842 papers on solar thermal collectors, photovoltaic/thermal hybrid technology, concentrated solar power plants, and related advancements such as phase change materials and nanofluid cooling. Key works include foundational texts like "Solar Engineering of Thermal Processes" by Duffie and Beckman (2013, 6023 citations) and reviews on thermal energy storage such as "Review on thermal energy storage with phase change materials and applications" by Sharma et al. (2008, 5534 citations). Growth data over the past 5 years is not available, but citation leaders highlight persistent focus on efficiency and applications in buildings and industries.
Topic Hierarchy
Research Sub-Topics
Solar Thermal Collectors
Solar thermal collectors encompass flat-plate, evacuated tube, and compound parabolic designs for low-to-medium temperature heat capture. Researchers optimize selective coatings, optical efficiency, and thermal losses under varying climates.
Concentrated Solar Power
Concentrated solar power uses parabolic troughs, towers, and dishes to focus sunlight for high-temperature steam generation. Researchers advance heliostat tracking, receiver materials, and dispatchable power with storage integration.
Photovoltaic Thermal Systems
Photovoltaic thermal hybrid systems cool PV modules while capturing waste heat for combined electricity and thermal output. Researchers model hybrid efficiency, nanofluid coolants, and building integration performance.
Phase Change Materials in Solar
Phase change materials store latent heat in solar systems for dispatchable thermal energy during off-sun hours. Researchers select organic/inorganic PCMs, encapsulation methods, and heat transfer enhancements.
Energy Exergy Analysis Solar
Energy exergy analysis evaluates first and second law efficiencies in solar conversion chains identifying irreversibility losses. Researchers apply exergy to collectors, hybrids, and power plants for thermodynamic optimization.
Why It Matters
Solar thermal and photovoltaic systems enable renewable energy capture for industrial heating, power generation, and building integration, reducing reliance on fossil fuels as detailed in "Role of renewable energy sources in environmental protection: A review" by Panwar et al. (2011, 3695 citations). Concentrated solar power plants and central receiver designs support large-scale electricity production, while photovoltaic/thermal hybrids enhance output by utilizing waste heat, as analyzed in energy and exergy studies. For instance, "Solar thermal collectors and applications" by Kalogirou (2004, 3076 citations) documents their use in water heating and space conditioning, achieving efficiencies up to those improved by phase change materials in storage systems reviewed by Zalba et al. (2002, 4524 citations). These technologies contribute to sustainability by enabling solar energy use in industries and environmental protection.
Reading Guide
Where to Start
"Solar Engineering of Thermal Processes" by Duffie and Beckman (2013) provides the foundational engineering principles for both solar thermal and photovoltaic systems, making it the ideal starting point for understanding core processes and analysis methods.
Key Papers Explained
"Solar engineering of thermal processes" (1982, 9567 citations) establishes thermal process fundamentals, extended comprehensively in "Solar Engineering of Thermal Processes" by Duffie and Beckman (2013, 6023 citations). "Solar thermal collectors and applications" by Kalogirou (2004, 3076 citations) applies these to collector designs, while "Review on thermal energy storage with phase change materials and applications" by Sharma et al. (2008, 5534 citations) and "Review on thermal energy storage with phase change: materials, heat transfer analysis and applications" by Zalba et al. (2002, 4524 citations) build on storage integration. "Optimization of Perturb and Observe Maximum Power Point Tracking Method" by Femia et al. (2005, 2891 citations) connects to PV optimization.
Paper Timeline
Most-cited paper highlighted in red. Papers ordered chronologically.
Advanced Directions
Research emphasizes energy and exergy analysis in photovoltaic/thermal hybrids, phase change materials, and nanofluid cooling, as per keyword focuses and top papers. No recent preprints from the last 6 months or news from the last 12 months indicate steady maturation without highlighted disruptions.
Papers at a Glance
| # | Paper | Year | Venue | Citations | Open Access |
|---|---|---|---|---|---|
| 1 | Solar engineering of thermal processes | 1982 | Solar Energy | 9.6K | ✕ |
| 2 | Solar Engineering of Thermal Processes | 2013 | — | 6.0K | ✕ |
| 3 | Review on thermal energy storage with phase change materials a... | 2008 | Renewable and Sustaina... | 5.5K | ✕ |
| 4 | Solar engineering of thermal processes | 1982 | Design Studies | 5.3K | ✕ |
| 5 | Review on thermal energy storage with phase change: materials,... | 2002 | Applied Thermal Engine... | 4.5K | ✕ |
| 6 | Role of renewable energy sources in environmental protection: ... | 2011 | Renewable and Sustaina... | 3.7K | ✕ |
| 7 | Solar thermal collectors and applications | 2004 | Progress in Energy and... | 3.1K | ✕ |
| 8 | A review on phase change energy storage: materials and applica... | 2003 | Energy Conversion and ... | 3.0K | ✕ |
| 9 | Optimization of Perturb and Observe Maximum Power Point Tracki... | 2005 | IEEE Transactions on P... | 2.9K | ✕ |
| 10 | Buoyancy-driven heat transfer enhancement in a two-dimensional... | 2003 | International Journal ... | 2.9K | ✕ |
Frequently Asked Questions
What are solar thermal collectors?
Solar thermal collectors absorb sunlight to generate heat for applications like water heating and space conditioning. "Solar thermal collectors and applications" by Kalogirou (2004, 3076 citations) covers flat-plate and evacuated tube designs. They perform energy and exergy analysis to optimize efficiency in various systems.
How do photovoltaic/thermal hybrid systems work?
Photovoltaic/thermal hybrids combine PV cells for electricity with thermal collectors for heat recovery from panel back surfaces. This integration improves overall efficiency by utilizing waste heat. Papers like "Solar Engineering of Thermal Processes" by Duffie and Beckman (2013, 6023 citations) provide foundational analysis for such systems.
What role do phase change materials play in solar thermal systems?
Phase change materials store thermal energy by latent heat during phase transitions, enhancing storage capacity in solar applications. "Review on thermal energy storage with phase change materials and applications" by Sharma et al. (2008, 5534 citations) reviews their integration in collectors and buildings. They address intermittency in solar supply through high energy density.
What is maximum power point tracking in photovoltaics?
Maximum power point tracking (MPPT) optimizes PV array output by continuously adjusting to the peak power point under varying irradiance and temperature. "Optimization of Perturb and Observe Maximum Power Point Tracking Method" by Femia et al. (2005, 2891 citations) details the perturb and observe algorithm. It maximizes energy harvest in PV systems.
How do nanofluids enhance solar thermal performance?
Nanofluids, suspensions of nanoparticles in base fluids, improve heat transfer via enhanced thermal conductivity and buoyancy effects. "Buoyancy-driven heat transfer enhancement in a two-dimensional enclosure utilizing nanofluids" by Khanafer et al. (2003, 2867 citations) demonstrates this in enclosures. They are applied in cooling PV panels and collectors.
What is the current state of research in this field?
The field includes 74,842 papers focused on efficiency, hybrids, and storage technologies. Highly cited reviews like "Review on thermal energy storage with phase change: materials, heat transfer analysis and applications" by Zalba et al. (2002, 4524 citations) remain central. No recent preprints or news coverage from the last 12 months is available.
Open Research Questions
- ? How can nanofluid properties be optimized for real-time cooling in concentrated solar power plants under varying irradiance?
- ? What are the long-term degradation mechanisms in building-integrated photovoltaic/thermal hybrids exposed to industrial environments?
- ? How do advanced phase change materials integrate with central receiver designs to minimize exergy losses?
- ? Which MPPT algorithms best handle partial shading in large-scale PV arrays combined with thermal storage?
- ? What coupling effects arise between solar thermal collectors and photovoltaic efficiency under nanofluid-enhanced heat transfer?
Recent Trends
The field maintains 74,842 works with high citation classics like "Solar engineering of thermal processes" (1982, 9566 citations in one variant) and Duffie and Beckman (2013, 6023 citations), but 5-year growth data is unavailable.
Persistent emphasis appears on phase change materials and nanofluids from reviews by Sharma et al. (2008, 5534 citations) and Khanafer et al. (2003, 2867 citations).
No recent preprints or news coverage signals no major shifts in the past year.
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