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Modeling Integration of Solar Thermo Photo Voltaic Systems (STPV) in Multi Products Energy Conversion System

Haji Ali Gol, Parisa | 2019

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 52534 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Saboohi, Yadolla; Fathi, Amir Hossein
  7. Abstract:
  8. The water and energy demand increase as the population grows. Increased usage of energy leads to scarcity of available resources and limited absorption capacity of environment. Development of efficient and environmentally compatible energy conversion technologies are conceived as an important option for resolving pressing challenges. Compatibility with environment requires considerable reduction in the share of fossil fuels and efficient utilization of renewable energy sources. Hence, development of high-efficiency solar energy systems is becoming an important challenge in the energy sector. The present study is involved with development an integrated solar system based on the application of thermophotovoltaic cells together with thermal cycle that may avail itself to generation of electricity, heating, cooling and thermal storage. In the present research work, an integrated multi-product hybrid solar thermophotovoltaic system has been modelled and appropriate analytical tools for its optimal design have been developed. For this purpose, mass and energy balance equations, along with other resources and technical constraints have been formulated for the whole system and its subsystems, using a super structure function that depicts the function of integrated system. The performance simulation of each section of the solar energy system is estimated using appropriate extended models as well as integrating the set of modules to reflect the multi-purpose system. The models of household electricity, cooling, heating and fresh water demand are estimated. The capacity of each component (levels of energy flow diagram), based on energy system at each level have then been identified. It has been found that in a specific case study following configuration could be achieved: Thermophotovoltaic system with capacity of 166.29 kWh, Organic Rankin cycle with capacity of 90.97 kWh, Absorption refrigeration system with24.3 kWh capacity, MED desalination with 40 liters of fresh water per day, Electricity sold to the grid up to 138.97 kWh from thermophotovoltaic system, 43 kWh from the Rankin organic system connected to TPV, 52 kWh from which connected to solar collector. The information obtained from application of a Multi-Objective model subjected to system models, technical constraints, capital costs and environmental limitations. The objective function includes investment costs, operating costs and emission costs. Electricity purchased from the grid has been calculated in accordance with the time tariff rate to supply demand in competition with ORC electricity. Sensitivity analysis indicated that increase in TPV capacity is associated with increased investment costs which also leads to reduced solar collector capacity. Sensitivity analysis indicated that the impact of feed-in-tariff is considerable. The payback period of the investment is estimated 8 years at 9% discount rate
  9. Keywords:
  10. Solar Energy ; Mathematical Programming ; Optimization ; Photovoltaic-Thermal System ; Demand Estimation ; Energy Demand ; Systems Integration ; Multi Product Integration

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