This paper analyzes and compares the performance of a new inverter topology with two types of input sources: 1) Solar PV source and 2) Ideal dc source (battery). The simulation is done in SIMULINK/MATLAB Software. It ...This paper analyzes and compares the performance of a new inverter topology with two types of input sources: 1) Solar PV source and 2) Ideal dc source (battery). The simulation is done in SIMULINK/MATLAB Software. It is shown that when the solar panel is connected, spikes are obtained in output voltage waveforms. These spikes are eliminated by inserting a capacitor. The capacitor is chosen for a particular power factor which is optimum with respect to cost, size and power quality. Total Harmonic Distortion, Active Power, Reactive Power, RMS Voltage and RMS Current are measured for different load power factor. Finally these results are compared with those obtained using battery with same input voltage magnitude. This Paper shows that for Solar Panel Circuit, THD, P and Q are less for 0.8 and above power factor, however below 0.8 PF, the THD, active and reactive power transfer are more. This means that the performance of Solar Panel in the proposed circuit topology is seen to be better as compared to the same circuit with battery within a range of power factor.展开更多
In today’s rapidly urbanizing world,there is dire need for adopting the principles of green/sustainable built-environment so as to mitigate the ill effects of environmental degradation and climate change.However,dema...In today’s rapidly urbanizing world,there is dire need for adopting the principles of green/sustainable built-environment so as to mitigate the ill effects of environmental degradation and climate change.However,demand for housing is on rise in developing countries like India,where sizeable population,especially the low-income strata,still lacks decent quality structurally safe housing.Extensive use of concrete and steel in construction over more than a century has led to detrimental environmental effects such uncontrolled release of greenhouse gases/pollutants,deforestation and erosion,leading to now visible outcomes of climate change.Bamboo,on other hand provides a sustainable alternative to concrete and steel as a building material since it absorbs the atmospheric carbon dioxide,produces more oxygen than timber producing trees and is a lightweight and renewable building material.Unlike timber,it matures in four to five years and being grass family,is replenishable in nature.However,from structural point of view,the main drawback of bamboo culm is its large slenderness ratio,which renders it weak in resisting bending and compressive loads.This paper presents an alternate structural system utilizing fibre reinforced bamboo composite(FRBC)to overcome the structural deficiency of a single shoot bamboo and build a prototype structure after detailed laboratory evaluation and structural analysis.Structural elements made from FRBC are utilized for fabricating a prototype 3D frame structure,measuring about 24 m2 in plan,representing a modular unit amenable to horizontal and vertical expansion.Eco-friendly materials like cow-dung based bricks and mortar,which offer net zero additional carbon dioxide emissions and circumvent reliance on cement and river sand,have been utilized as masonry infills after structural evaluation.The built structure provides a proof-of-concept demonstration of the feasibility of using bamboo and cow-dung,sustainable building materials,for achieving a structurally safe built-environment.The technology is especially suitable for countries like India which are endowed with tropical climatic conditions.By adopting such environmentally friendly alternatives,the construction industry can create a healthier environment while addressing housing and infrastructure needs in sustainable manner.展开更多
文摘This paper analyzes and compares the performance of a new inverter topology with two types of input sources: 1) Solar PV source and 2) Ideal dc source (battery). The simulation is done in SIMULINK/MATLAB Software. It is shown that when the solar panel is connected, spikes are obtained in output voltage waveforms. These spikes are eliminated by inserting a capacitor. The capacitor is chosen for a particular power factor which is optimum with respect to cost, size and power quality. Total Harmonic Distortion, Active Power, Reactive Power, RMS Voltage and RMS Current are measured for different load power factor. Finally these results are compared with those obtained using battery with same input voltage magnitude. This Paper shows that for Solar Panel Circuit, THD, P and Q are less for 0.8 and above power factor, however below 0.8 PF, the THD, active and reactive power transfer are more. This means that the performance of Solar Panel in the proposed circuit topology is seen to be better as compared to the same circuit with battery within a range of power factor.
文摘In today’s rapidly urbanizing world,there is dire need for adopting the principles of green/sustainable built-environment so as to mitigate the ill effects of environmental degradation and climate change.However,demand for housing is on rise in developing countries like India,where sizeable population,especially the low-income strata,still lacks decent quality structurally safe housing.Extensive use of concrete and steel in construction over more than a century has led to detrimental environmental effects such uncontrolled release of greenhouse gases/pollutants,deforestation and erosion,leading to now visible outcomes of climate change.Bamboo,on other hand provides a sustainable alternative to concrete and steel as a building material since it absorbs the atmospheric carbon dioxide,produces more oxygen than timber producing trees and is a lightweight and renewable building material.Unlike timber,it matures in four to five years and being grass family,is replenishable in nature.However,from structural point of view,the main drawback of bamboo culm is its large slenderness ratio,which renders it weak in resisting bending and compressive loads.This paper presents an alternate structural system utilizing fibre reinforced bamboo composite(FRBC)to overcome the structural deficiency of a single shoot bamboo and build a prototype structure after detailed laboratory evaluation and structural analysis.Structural elements made from FRBC are utilized for fabricating a prototype 3D frame structure,measuring about 24 m2 in plan,representing a modular unit amenable to horizontal and vertical expansion.Eco-friendly materials like cow-dung based bricks and mortar,which offer net zero additional carbon dioxide emissions and circumvent reliance on cement and river sand,have been utilized as masonry infills after structural evaluation.The built structure provides a proof-of-concept demonstration of the feasibility of using bamboo and cow-dung,sustainable building materials,for achieving a structurally safe built-environment.The technology is especially suitable for countries like India which are endowed with tropical climatic conditions.By adopting such environmentally friendly alternatives,the construction industry can create a healthier environment while addressing housing and infrastructure needs in sustainable manner.
