Nairobi : the geography of a new city / by R. W. Walmsley

• Record Nr.: UNINA990007534720403321
• Autore: Walmsley, Roland Wesley
• Pubbl/distr/stampa: Nairobi : the Eagle press, 1957
• Descrizione fisica: 55 p. : ill. ; 23 cm
• Collana: East African local studies ; 1
• Locazione: ILFGE
• Collocazione: F-02-033
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia

Renewable energy utilization using underground energy systems / / Paweł Ocłoń

• Record Nr.: UNINA9910488727403321
• Autore: Ocłoń Paweł
• Pubbl/distr/stampa: Cham, Switzerland : , : Springer, , [2021]; ©2021
• ISBN: 3-030-75228-3
• Descrizione fisica: 1 online resource (182 pages)
• Collana: Lecture Notes in Energy ; ; v.84
• Disciplina: 697
• Soggetti: Underground architecture; Heating; Heat - Transmission
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Nota di contenuto: Intro -- Introduction -- Contents -- Symbols -- 1 Renewable Energy Sources in Poland -- References -- 2 Storage of Thermal Energy ; in the Ground -- 2.1 Storage of Thermal Energy in the Tank Thermal Energy Storage Method -- 2.2 Storage of Thermal Energy in the Pit Thermal Energy Storage Method -- 2.3 Storage of Thermal Energy in the Borehole Thermal Energy Storage Method -- 2.4 Thermal Energy Storage in Reinforced Concrete Energy Piles -- 2.5 Storage of Thermal Energy in the Aquifer Thermal Energy Storage Method -- 2.6 Storage of Thermal Energy in the Cavity Thermal Energy Storage Method -- References -- 3 Solar-Assisted Heat Pumps -- 3.1 Solar-Assisted Ground Source Heat Pumps -- References -- 4 Zero-Emission Building Heating System Using Thermal Energy Accumulation in the Ground -- 4.1 Concept of the System -- 4.2 Components of the System -- 4.2.1 PVT Panels with a Sun-Tracking System -- 4.2.2 Demonstration Installation of a Zero-Emission System with Heat Accumulation in the Ground -- 5 Mathematical Modelling of the Resheat System -- 5.1 Thermal Properties of the Ground -- 5.1.1 Thermal Conductivity of the Ground-the Campbell-De Vries Model -- 5.1.2 Soil Specific Heat -- 5.2 Modelling the Building Heating System with Heat Accumulation in the Ground -- 5.2.1 Calculation of the Heat Pump Coefficient of Performance -- 5.2.2 A Mathematical Model of RESHeat System with Heat Accumulation in Two Underground Tanks -- 5.2.3 Discretization of Energy Equation-Finite Volume Method -- 5.2.4 General Energy Balance Equations in the Cartesian Coordinate System -- 5.2.5 Results and Discussion -- 5.2.6 Analysis of the Impact of the Ground Thermophysical Properties on the Performance of the Heat Accumulation System -- References -- 6 Resheat System Optimization -- 6.1 PSO Method Algorithm -- 6.2 Calculation Results -- References.; 7 Modelling Heat Transfer in the PV Panel Cooling System -- 7.1 Numerical Modelling of the Temperature Distribution of PVT Panels -- 7.1.1 Model of Heat Exchange in PVT Panels -- 7.1.2 PV Panel Energy Balance Equation-The Cartesian System -- 7.1.3 PV Panel Energy Balance Equation-The Cylindrical System -- 7.1.4 Discretization of the Coolant Energy Equation-Finite Difference Method -- 7.2 Analysis of the Cooling System Operation -- References -- 8 Economic Analysis -- 9 Advantages of the Resheat System Over Traditional Solutions -- 10 Optimization of Underground Power Cable Systems -- 10.1 Optimization Problem -- 10.2 Electric-thermal Model of the Considered UTL -- 10.3 Thermal Conductivity of the Computational Subdomains -- 10.3.1 Thermal Conductivity of Cable Layers -- 10.3.2 Thermal Conductivity of the Soil and Backfill Materials -- 10.4 Optimization Algorithm -- 10.4.1 Jaya Algorithm -- 10.4.2 Modified Jaya Algorithm -- 10.5 Results and Discussion -- 10.5.1 Performance Analysis of the Modified Jaya Algorithm -- 10.5.2 Material Cost Optimization and Thermal Performance Analysis for a 400 kV ULT -- 10.5.3 Thermal Performance of Different Backfill Materials Under Variable Loading -- 10.5.4 Thermal Performance of the UPCS Under Various Soil and Backfill Thermal Conductivities -- 10.6 Outline -- References -- Summary and Conclusions.