4E Advancement of Heat Recovery during Hot Seasons for a Building Integrated Photovoltaic Thermal (BIPV/T) System

In conventional building integrated photovoltaic thermal (BIPV/T) systems, heat is only recovered during cold seasons. However, no recovery takes place in hot seasons. Therefore, this study comes up with an answer to the question “how much improvement in the amount of annual recovered heat (ANRH), average exergy efficiency (AAEE), and CO2 saving (ACDS), as well as payback period (PBP), is achieved when heat recovery is done in hot seasons?”. These are representatives of energy, exergy, environmental and economic (4E) aspects, respectively. The results show a 135.6%, 1.8% and 123.0% enhancement in the ANRH, AAEE and ACDS, respectively, while PBP decreases from 6.10 to 3.94 years.

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Integration of Building Integrated Photovoltaic/Thermal (BIPV/T) System with Heat Recovery Ventilators for Improved Performance Under Extreme Cold Climates

Springer Proceedings in Energy - Cold Climate HVAC 2018 ◽

10.1007/978-3-030-00662-4_9 ◽

2018 ◽

pp. 97-110

Author(s):

Riccardo Toffanin ◽

Hua Ge ◽

Andreas Athienitis

Keyword(s):

Heat Recovery ◽

Cold Climates ◽

Building Integrated Photovoltaic ◽

Extreme Cold ◽

Improved Performance ◽

T System

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Thermo-economic multi-objective optimization of an innovative Rankine–organic Rankine dual-loop system integrated with a gas engine for higher energy/exergy efficiency and lower payback period

Journal of Thermal Analysis and Calorimetry ◽

10.1007/s10973-021-10753-y ◽

2021 ◽

Author(s):

Sepehr Sanaye ◽

Ali Ghaffari

Keyword(s):

Payback Period ◽

Exergy Efficiency ◽

Loop System ◽

Multi Objective Optimization ◽

Gas Engine ◽

Multi Objective

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Design and Fabrication of Absorptive/Reflective Crossed CPC PV/T System

Designs ◽

10.3390/designs2030029 ◽

2018 ◽

Vol 2 (3) ◽

pp. 29

Author(s):

Muhsin Aykapadathu ◽

Mehdi Nazarinia ◽

Nazmi Sellami

Keyword(s):

Numerical Control ◽

Solar Concentrator ◽

Cnc Milling ◽

Acceptance Angle ◽

Optical Efficiency ◽

Compound Parabolic Concentrator ◽

Building Integrated Photovoltaic ◽

New Generation ◽

Experimental Rig ◽

T System

A crossed compound parabolic concentrator (CCPC) is a non-imaging concentrator which is a modified form of a circular 3D compound parabolic concentrator (CPC) obtained by orthogonal intersection of two 2D CPCs that have an optical efficiency in line with that of 3D CPC. The present work is about the design and fabrication of a new generation of solar concentrator: the hybrid photovoltaic (PV)/thermal absorptive/reflective CCPC module. The module has a 4× CCPC structure truncated to have a concentration of 3.6× with a half acceptance angle of 30°. Furthermore, an experimental rig was also fabricated to test the performance of the module and its feasibility in real applications such as building-integrated photovoltaic (BIPV). 3D printing and Computer Numerical Control (CNC) milling technologies were utilized to manufacture the absorber and reflective parts of the module.

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Payback period estimation and parameter optimization of subcritical organic Rankine cycle system for waste heat recovery

Energy ◽

10.1016/j.energy.2015.05.095 ◽

2015 ◽

Vol 88 ◽

pp. 734-745 ◽

Cited By ~ 20

Author(s):

Xiao-Qiong Wang ◽

Xiao-Ping Li ◽

You-Rong Li ◽

Chun-Mei Wu

Keyword(s):

Parameter Optimization ◽

Heat Recovery ◽

Waste Heat Recovery ◽

Waste Heat ◽

Organic Rankine Cycle ◽

Rankine Cycle ◽

Payback Period ◽

Cycle System ◽

Period Estimation

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Energy and Exergy Analyses of Tube Banks in Waste Heat Recovery Applications

Energies ◽

10.3390/en11082094 ◽

2018 ◽

Vol 11 (8) ◽

pp. 2094 ◽

Cited By ~ 7

Author(s):

Mustafa Erguvan ◽

David MacPhee

Keyword(s):

Energy Efficiency ◽

Reynolds Number ◽

Heat Recovery ◽

Waste Heat ◽

Cross Flow ◽

Exergy Efficiency ◽

Circular Cylinders ◽

Published Data ◽

Energy And Exergy ◽

Exergy Analyses

In this study, energy and exergy analyses have been investigated numerically for unsteady cross-flow over heated circular cylinders. Numerous simulations were conducted varying the number of inline tubes, inlet velocity, dimensionless pitch ratios and Reynolds number. Heat leakage into the domain is modeled as a source term. Numerical results compare favorably to published data in terms of Nusselt number and pressure drop. It was found that the energy efficiency varies between 72% and 98% for all cases, and viscous dissipation has a very low effect on the energy efficiency for low Reynolds number cases. The exergy efficiency ranges from 40–64%, and the entropy generation due to heat transfer was found to have a significant effect on exergy efficiency. The results suggest that exergy efficiency can be maximized by choosing specific pitch ratios for various Reynolds numbers. The results could be useful in designing more efficient heat recovery systems, especially for low temperature applications.

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Evaluation and analysis of exergoeconomic performance for the calcination process of green petroleum coke in vertical shaft kiln

Thermal Science ◽

10.2298/tsci210609294l ◽

2021 ◽

pp. 294-294

Author(s):

Peng Li ◽

Baokuan Li ◽

Zhongqiu Liu ◽

Wenjie Rong

Keyword(s):

Heat Recovery ◽

Waste Heat Recovery ◽

Waste Heat ◽

Shaft Furnace ◽

Exergy Efficiency ◽

Heat Recovery Boiler ◽

Vertical Shaft ◽

Exergy Destruction ◽

Calcination Process ◽

Recovery Boiler

The main objective of this paper is to establish a mathematical framework to analyze the complex thermal economic performance of the calcination process. To find the factors affecting exergy efficiency loss, different exergy destruction is investigated in detail. Furthermore, the exergy flow cost model for exergy cost saving has also been developed. The results show that the vertical shaft furnace is a self-sufficiency equipment without additional fuel required, but the overall exergy destruction accounts for 54.11% of the total exergy input. In addition, the energy efficiency of the waste heat recovery boiler and thermal deaerator are 83.52% and 96.40%, whereas the exergy efficiency of the two equipment are 65.98% and 94.27%. Furthermore, the import exergy flow cost of vertical shaft furnace, waste heat recovery boiler and thermal deaerator are 366.5197 RMB/MJ, 0.1426 RMB/MJ and 0.0020RMB/MJ, respectively. Based on the result, several suggestions were proposed to improve the exergoeconomic performance. Assessing the performance of suggested improvements, the total exergy destruction of vertical shaft furnace is reduced to 134.34 GJ/h and the exergy efficiency of waste heat recovery boiler is raised up to 66.02%. Moreover, the import exergy flow cost of the three different equipment is reduced to 0.0329 RMB/MJ, 0.1304 RMB/MJ and 0.0002 RMB/MJ, respectively.

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Building Integrated Photovoltaic Module-Based on Aluminum Substrate With Forced Water Cooling

Journal of Solar Energy Engineering ◽

10.1115/1.4038787 ◽

2018 ◽

Vol 140 (2) ◽

Cited By ~ 2

Author(s):

Wei Pang ◽

Yongzhe Zhang ◽

Yanan Cui ◽

Hongwen Yu ◽

Yu Liu ◽

...

Keyword(s):

Solar Energy ◽

Glass Substrate ◽

Operating Temperature ◽

Aluminum Substrate ◽

Photovoltaic Module ◽

Water Cooling ◽

Electrical Efficiency ◽

Building Integrated Photovoltaic ◽

Pv Cell ◽

T System

The increase of operating temperature on a photovoltaic (PV) cell degrades its electrical efficiency. This paper is organized to describe our latest design of an aluminum substrate—based photovoltaic/thermal (PV/T) system. The electrical efficiency of the proposed PV/T can be increased by ∼ 20% in comparison with a conventional glass substrate-based PV. The work will benefit hybrid utilization of solar energy in development of building integrated photovoltaic systems.

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