Subodh Paudel - Academia.edu (original) (raw)

Papers by Subodh Paudel

Research paper thumbnail of Wind resource assessment in Europe Using Europe

In context of increasing use of renewable sources, it is of importance to correctly evaluate the ... more In context of increasing use of renewable sources, it is of importance to correctly evaluate the actual sustainability of their implementation. Emergy analysis is one of the possible methods useful for such an assessment. This work aims to demonstrate how the emergy approach can be used to assess the sustainability of wind energy resource in Europe. The Emergy Index of Sustainability (EIS) and the Emergy Yield Ratio (EYR) are used to analyze 90 stations of European regions for three types of wind turbines. To do so, the simplified Chou wind turbine model is used for different set of parameters as: nominal power and size of the wind turbines, and cut-in and cut-out wind speeds. Based on the calculation of the emergy indices, a mapping is proposed to identify the most appropriate locations for an implementation of wind turbines in European regions. The influence of the wind turbine type on the sustainability is also analyzed, in link with the local wind resource. Thus, it is concluded that the emergy sustainability indices are sensitive to the wind turbine design parameters (size, cut-in and cut-out wind speed).

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Research paper thumbnail of Neural Network based Building Energy Consumption Forecast using Pseudo Dynamic Approach

Building energy consumption prediction has been a major concern in the recent years. The energy c... more Building energy consumption prediction has been a major concern in the recent years. The energy consumption in building is essential for building manager to manage the building energy management system (BEMS) and energy operator in making energy decision services. This paper proposes a building energy consumption prediction with novel pseudo dynamic transitional methods with occupancy profiles and operational power characteristics of buildings. The case study is applied to heating energy consumption of buildings and results show that pseudo dynamic model have coefficient of correlation of energy consumption of error of 0.02%. Further, orthogonal array design is applied to the pseudo dynamic model to check the schedule of occupancy profile and operational power level of building energy consumption.

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Research paper thumbnail of Pseudo Dynamic Transitional Modeling of Building Heating Energy Demand Using Artificial Neural Network

This paper presents the building heating demand prediction model with occupancy profile and opera... more This paper presents the building heating demand prediction model with occupancy profile and operational heating power level characteristics in short time horizon (a couple of days) using artificial neural network. In addition, novel pseudo dynamic transitional model is introduced, which consider time dependent attributes of operational power level characteristics and its effect in the overall model performance is outlined. Pseudo dynamic model is applied to a case study of French Institution building and compared its results with static and other pseudo dynamic neural network models. The results show the coefficients of correlation in static and pseudo dynamic neural network model of 0.82 and 0.89 (with energy consumption error of 0.02%) during the learning phase, and 0.61 and 0.85 during the prediction phase, respectively. Further, orthogonal array design is applied to the pseudo dynamic model to check the schedule of occupancy profile and operational heating power level characteristics. The results show the new schedule and provide the robust design for pseudo dynamic model. Due to prediction in short time horizon, it finds application for Energy Services Company (ESCOs) to manage the heating load for dynamic control of heat production system.

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Research paper thumbnail of Technical and Economic Assessment of Renewable Energy Sources for Telecom Application: A Case Study of Nepal Telecom

5th International Conference on Power and Energy Systems, Oct 28, 2013

Telecommunication Networks have changed the way people live, work and play. Due to the massive de... more Telecommunication Networks have changed the way people live, work and play. Due to the massive demand of broadband services, the power solutions is an urgent requirement which are provided to these stations and networks through the use of grid electricity, conventional energy and alternative energy sources. In the urban areas, telecommunication network can be powered through the use of grid electricity, however, in rural areas grid electricity is not available or is available in few stations only and the use of conventional energy is costly as well. This paper gives an overview of existing power network of Base Transreceiver Station (BTS) of Nepal Telecom (NT) and present technical and economic assessment for proper selection of technologies on Diesel Generator (DG), hybrid DG/Battery and hybrid Photovoltaic PV/DG/Battery as a backup power supply in the urban areas, and hybrid PV/Wind with Battery backup, PV with Battery backup and PV with FuelCell/Electrolyzer/Battery backup in the rural areas.

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Research paper thumbnail of Optimization of hybrid PV/wind power system for remote telecom station

IEEE Conference on Power and Energy Systems (ICPS), Dec 22, 2011

The rapid depletion of fossil fuel resources and environmental concerns has given awareness on ge... more The rapid depletion of fossil fuel resources and environmental concerns has given awareness on generation of renewable energy resources. Among the various renewable resources, hybrid solar and wind energy seems to be promising solutions to provide reliable power supply with improved system efficiency and reduced storage requirements for stand-alone applications. This paper presents a feasibility assessment and optimum size of photovoltaic (PV) array, wind turbine and battery bank for a standalone hybrid Solar/Wind Power system (HSWPS) at remote telecom station of Nepal at Latitude (27°23'50") and Longitude (86°44'23") consisting a telecommunication load of Very Small Aperture Terminal (VSAT), Repeater station and Code Division Multiple Access Base Transceiver Station (CDMA 2C10 BTS). In any RES based system, the feasibility assessment is considered as the first step analysis. In this work, feasibility analysis is carried through hybrid optimization model for electric renewables (HOMER) and mathematical models were implemented in the MATLAB environment to perform the optimal configuration for a given load and a desired loss of power supply probability (LPSP) from a set of systems components with the lowest value of cost function defined in terms of reliability and levelized unit electricity cost (LUCE). The simulation results for the existing and the proposed models are compared. The simulation results shows that existing architecture consisting of 6.12 kW KC85T photovoltaic modules, 1kW H3.1 wind turbine and 1600 Ah GFM-800 battery bank have a 36.6% of unmet load during a year. On the other hand, the proposed system includes 1kW *2 H3.1 Wind turbine, 8.05 kW TSM-175DA01 photovoltaic modules and 1125 Ah T-105 battery bank with system reliability of 99.99% with a significant cost reduction as well as reliable energy production.

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Research paper thumbnail of SUBODH PAUDEL OPTIMIZATION OF HYBRID PV/WIND POWER SYSTEM FOR REMOTE TELECOM STATION

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Research paper thumbnail of Migration of TDM network into NGN for the Fixed Wireline access Network

This paper outlines the telecommunication network evolution from copper based technologies to fib... more This paper outlines the telecommunication network evolution from copper based technologies to fiber based next generation network (NGN). In addition, some practical issues are addressed, for instance migration from Time Division Multiplexing (TDM) network to Internet Protocol (IP) network, transformation from circuit switch network to packet switch network, and network design with under the NGN architecture. A case study of optical access network design and architecture at Nepal Telecom (NT) is done to perform the migration of TDM into NGN for the Fixed Wire-line Network.

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Research paper thumbnail of Wind resource assessment in Europe Using Europe

In context of increasing use of renewable sources, it is of importance to correctly evaluate the ... more In context of increasing use of renewable sources, it is of importance to correctly evaluate the actual sustainability of their implementation. Emergy analysis is one of the possible methods useful for such an assessment. This work aims to demonstrate how the emergy approach can be used to assess the sustainability of wind energy resource in Europe. The Emergy Index of Sustainability (EIS) and the Emergy Yield Ratio (EYR) are used to analyze 90 stations of European regions for three types of wind turbines. To do so, the simplified Chou wind turbine model is used for different set of parameters as: nominal power and size of the wind turbines, and cut-in and cut-out wind speeds. Based on the calculation of the emergy indices, a mapping is proposed to identify the most appropriate locations for an implementation of wind turbines in European regions. The influence of the wind turbine type on the sustainability is also analyzed, in link with the local wind resource. Thus, it is concluded that the emergy sustainability indices are sensitive to the wind turbine design parameters (size, cut-in and cut-out wind speed).

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Research paper thumbnail of Neural Network based Building Energy Consumption Forecast using Pseudo Dynamic Approach

Building energy consumption prediction has been a major concern in the recent years. The energy c... more Building energy consumption prediction has been a major concern in the recent years. The energy consumption in building is essential for building manager to manage the building energy management system (BEMS) and energy operator in making energy decision services. This paper proposes a building energy consumption prediction with novel pseudo dynamic transitional methods with occupancy profiles and operational power characteristics of buildings. The case study is applied to heating energy consumption of buildings and results show that pseudo dynamic model have coefficient of correlation of energy consumption of error of 0.02%. Further, orthogonal array design is applied to the pseudo dynamic model to check the schedule of occupancy profile and operational power level of building energy consumption.

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Research paper thumbnail of Pseudo Dynamic Transitional Modeling of Building Heating Energy Demand Using Artificial Neural Network

This paper presents the building heating demand prediction model with occupancy profile and opera... more This paper presents the building heating demand prediction model with occupancy profile and operational heating power level characteristics in short time horizon (a couple of days) using artificial neural network. In addition, novel pseudo dynamic transitional model is introduced, which consider time dependent attributes of operational power level characteristics and its effect in the overall model performance is outlined. Pseudo dynamic model is applied to a case study of French Institution building and compared its results with static and other pseudo dynamic neural network models. The results show the coefficients of correlation in static and pseudo dynamic neural network model of 0.82 and 0.89 (with energy consumption error of 0.02%) during the learning phase, and 0.61 and 0.85 during the prediction phase, respectively. Further, orthogonal array design is applied to the pseudo dynamic model to check the schedule of occupancy profile and operational heating power level characteristics. The results show the new schedule and provide the robust design for pseudo dynamic model. Due to prediction in short time horizon, it finds application for Energy Services Company (ESCOs) to manage the heating load for dynamic control of heat production system.

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Research paper thumbnail of Technical and Economic Assessment of Renewable Energy Sources for Telecom Application: A Case Study of Nepal Telecom

5th International Conference on Power and Energy Systems, Oct 28, 2013

Telecommunication Networks have changed the way people live, work and play. Due to the massive de... more Telecommunication Networks have changed the way people live, work and play. Due to the massive demand of broadband services, the power solutions is an urgent requirement which are provided to these stations and networks through the use of grid electricity, conventional energy and alternative energy sources. In the urban areas, telecommunication network can be powered through the use of grid electricity, however, in rural areas grid electricity is not available or is available in few stations only and the use of conventional energy is costly as well. This paper gives an overview of existing power network of Base Transreceiver Station (BTS) of Nepal Telecom (NT) and present technical and economic assessment for proper selection of technologies on Diesel Generator (DG), hybrid DG/Battery and hybrid Photovoltaic PV/DG/Battery as a backup power supply in the urban areas, and hybrid PV/Wind with Battery backup, PV with Battery backup and PV with FuelCell/Electrolyzer/Battery backup in the rural areas.

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Research paper thumbnail of Optimization of hybrid PV/wind power system for remote telecom station

IEEE Conference on Power and Energy Systems (ICPS), Dec 22, 2011

The rapid depletion of fossil fuel resources and environmental concerns has given awareness on ge... more The rapid depletion of fossil fuel resources and environmental concerns has given awareness on generation of renewable energy resources. Among the various renewable resources, hybrid solar and wind energy seems to be promising solutions to provide reliable power supply with improved system efficiency and reduced storage requirements for stand-alone applications. This paper presents a feasibility assessment and optimum size of photovoltaic (PV) array, wind turbine and battery bank for a standalone hybrid Solar/Wind Power system (HSWPS) at remote telecom station of Nepal at Latitude (27°23'50") and Longitude (86°44'23") consisting a telecommunication load of Very Small Aperture Terminal (VSAT), Repeater station and Code Division Multiple Access Base Transceiver Station (CDMA 2C10 BTS). In any RES based system, the feasibility assessment is considered as the first step analysis. In this work, feasibility analysis is carried through hybrid optimization model for electric renewables (HOMER) and mathematical models were implemented in the MATLAB environment to perform the optimal configuration for a given load and a desired loss of power supply probability (LPSP) from a set of systems components with the lowest value of cost function defined in terms of reliability and levelized unit electricity cost (LUCE). The simulation results for the existing and the proposed models are compared. The simulation results shows that existing architecture consisting of 6.12 kW KC85T photovoltaic modules, 1kW H3.1 wind turbine and 1600 Ah GFM-800 battery bank have a 36.6% of unmet load during a year. On the other hand, the proposed system includes 1kW *2 H3.1 Wind turbine, 8.05 kW TSM-175DA01 photovoltaic modules and 1125 Ah T-105 battery bank with system reliability of 99.99% with a significant cost reduction as well as reliable energy production.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of SUBODH PAUDEL OPTIMIZATION OF HYBRID PV/WIND POWER SYSTEM FOR REMOTE TELECOM STATION

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Migration of TDM network into NGN for the Fixed Wireline access Network

This paper outlines the telecommunication network evolution from copper based technologies to fib... more This paper outlines the telecommunication network evolution from copper based technologies to fiber based next generation network (NGN). In addition, some practical issues are addressed, for instance migration from Time Division Multiplexing (TDM) network to Internet Protocol (IP) network, transformation from circuit switch network to packet switch network, and network design with under the NGN architecture. A case study of optical access network design and architecture at Nepal Telecom (NT) is done to perform the migration of TDM into NGN for the Fixed Wire-line Network.

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