Himanshu Dehra - Academia.edu (original) (raw)

Videos by Himanshu Dehra

Noise is defined as a sensation of unwanted intensity of a wave. It is perception of a pollutant and a type of environmental stressor. The unwanted intensity of a wave is a propagation of noise due to transmission of energy source waves (viz. physical agents) such as sun, light, sound, heat, electricity, fluid and fire. Human Noise Behavior is checked by identifying a source and a sink of noise i.e. a person making noise and a person affected by such noise.

Papers by Himanshu Dehra

Selection and peer-review under responsibility of the scientific committee of the 13th Int. Conf.... more Selection and peer-review under responsibility of the scientific committee of the 13th Int. Conf. on Applied Energy (ICAE2021).

Dataset of Correspondences, Court/Public Notices, White Paper and Presentations of Monarchy of Co... more Dataset of Correspondences, Court/Public Notices, White Paper and Presentations of Monarchy of Concordia with various governments/organizations/agencies.

An experimental study was conducted for ascertaining electrical and thermal characteristics of a ... more An experimental study was conducted for ascertaining electrical and thermal characteristics of a pair of photovoltaic (PV) modules integrated with solar wall of an outdoor room. A pre-fabricated outdoor room was setup for conducting outdoor experiments on a PV solar wall with passive and active ventilation through the outdoor room. The selective operating conditions for glass coated PV modules were utilized for establishing their electrical and thermal characteristics. The PV solar wall was made up of glass coated PV modules, a ventilated air column, and an insulating layer of polystyrene filled plywood board. The measurements collected were currents, voltages, electric power, air velocities, temperatures, solar intensities, and thermal time constant. The results have demonstrated that: i) a PV solar wall installed on a wooden frame was of more heat generating capacity in comparison to a window glass or a standalone PV module; ii) generation of electric power was affected with opera...

To monitor noise and human noise behavior in a city, a review of nanosensors for sensing noise of... more To monitor noise and human noise behavior in a city, a review of nanosensors for sensing noise of physical agents is performed. For example, monitoring an improved transportation system would not only result in energy conservation and economical affordability but also result in generating less noise⁎. As is the case of increased energy consumption, increased quantities of goods and services result in generation of more noise behavior⁎⁎ in a city. Nanosensors for sensing noise of physical agents (light, sound, heat, fluid, electricity, fire, and the sun) are discussed. With integrated environmental control, these environmental parameters are to be characterized and checked for comfort and wellness, and controlled through various environmental monitoring sensors. The effect of these human behavioral parameters is characterized and measured on a logarithmic noise scale. Sensing and monitoring of human noise behavior from human systems in a city requires real-time informatics capabiliti...

Canadian Acoustics, 2008

The standardization of noise scale is performed by presenting their sources, definitions, their m... more The standardization of noise scale is performed by presenting their sources, definitions, their measurement equations, and units. The objective is to standardize the characterization of noise interference, due to difference of power of two intensities. The difference of two power intensities can be due to transmission of light, sound heat, electricity, fluid, and fire into a particle body. The sources of noise are classified according to the type of wave of interference, such as light, sound, heat, electricity, fluid, and fire. The criteria for definitions of noise are based on areas of energy stored in a wave, due to interference, speed of wave, and difference of power between two intensities of wave. Some of the definitions of noise are based on criteria, such as noise of sol and noise of therm.

This chapter presents state-of-the-art and major developments in wireless power transfer using so... more This chapter presents state-of-the-art and major developments in wireless power transfer using solar energy. The brief state-of-the-art is presented for solar photovoltaic technologies which can be combined with wireless power transfer (WPT) to interact with the ambient solar energy. The main purpose of the solar photovoltaic system is to distribute the collected electrical energy in various small-scale power applications wirelessly. These recent developments give technology based on how to transmit electrical power without any wires, with a small-scale by using solar energy. The power can also be transferred wirelessly through an inductive coupling as an antenna. With this wireless electricity we can charge and make wireless electricity as an input source to electronic equipment such as cellphone, MP3 Player etc. In harvesting energy, technologies of ambient solar radiation like solar photovoltaic, kinetic, thermal or electro-magnetic (EM) energy can be used to recharge the batteri...

The electrodynamics of a pair of photovoltaic (PV) modules wit h connected resistance due to ther... more The electrodynamics of a pair of photovoltaic (PV) modules wit h connected resistance due to thermal mass of an outdoor room has been presented. The exper iments were conducted on a pair of glass coated PV modules connected with a series electrical circ uit through a rheostat. A steady state network model for a pair of PV modules connected with building resistive ne twork has been proposed. The principles of electromagnetic wave theory have been applied to perform the energy balances on the discretised nodal elements in the network. The solution accuracy for prediction of temperatures at various nodes in the network is based on the magnitude and number of the connected resistan ces in the circuit, the smaller the shunt resistance value the greater has been the accuracy. Key-Words: PV module, rheostat, amplifier, conductance, network model

International Journal of Social Sciences

Applied Energy, 2017

The aim of this paper is to present an investigation on energy performance assessment of a photov... more The aim of this paper is to present an investigation on energy performance assessment of a photovoltaic solar wall with an operation of either buoyancy-induced or fan-assisted ventilation system. The vertical photovoltaic solar wall was installed on facade of a prefabricated outdoor test-room located at Concordia University, Montreal, Quebec, Canada. The experimental apparatus of the photovoltaic solar wall was a built construction with two commercially available photovoltaic modules, an air cavity and an insulated back layer. The selected operating conditions for the ventilated PV facade were utilized for establishing their electrical and thermal characteristics. Measurements of electric power, outlet air velocities, temperatures, solar intensities and thermal time constant were obtained from the experiments. The maximum combined electrical plus thermal efficiencies obtained after analysis of the presented measurement data were 31.4% and 37.6% for buoyancy-induced and fan-assisted based air ventilation respectively. The energy balance performed for buoyancy-induced and fan-assisted ventilation demonstrated that operation of fan-assisted ventilation achieved better performance, due to considerable gain in enthalpy of air by convection heat loss. A simplified energy performance model is proposed and validated. The agreement between predictions of the proposed energy performance model and measurement results is presented to be very good.

International Journal of Thermal Sciences, 2016

Abstract A mathematical model comprising of analytical and two dimensional network procedures is ... more Abstract A mathematical model comprising of analytical and two dimensional network procedures is proposed for predicting steady heat flow and heat transport in a solar heated thermosyphon integrated with building envelope. The detail mathematical solution method is presented for solving partial differential heat flow and transport equations by performing two dimensional energy balances at surface and air nodes through conjugate heat exchange and heat transport analysis of a solar thermosyphon. The mathematical solution procedure is devised for conduction and radiation heat exchange between surface nodes to improve the accuracy of traditional analytical solution for predicting buoyancy-induced mass flow rate of air flowing through a solar thermosyphon. The matrix inversion solution of mathematical model is unconditionally stable, with accuracy dependent on magnitude of conductance terms and number of nodes in the grid. Only Δy is chosen as aspect ratios (Δx = L, L/H and W/H) are defined by the geometry of the thermosyphon. The conduction and convection conductance terms are based on discretisation height Δy, thermal capacity conductance (mcp) is based on air-gap length Δx, whilst integrated radiation conductance terms are based on both height Δy and width Δx of the grid. The proposed model has compared the results obtained from analytical method, two dimensional network method for a single set of environmental condition with given geometry of thermosyphon. The proposed model is validated with experimental results obtained from outdoor experimental setup comprising of thermosyphon based photovoltaic solar wall system.

Natural Resources, 2013

A novel theory of acoustics in solar energy supporting the principle of source and sink of solar ... more A novel theory of acoustics in solar energy supporting the principle of source and sink of solar energy is presented. The significance of the theory is in ascertaining the aftermaths of turning off solar energy. An amplifier constituting of a parallel plate photovoltaic device connected to a potentiometer is illustrated. It was constructed with a pair of glass coated photovoltaic modules and polystyrene filled plywood board as back panel with air ventilation through a parallel plate channel of amplifier. The sample results obtained from experiments and simulation model are presented to support hypothesis of acoustics for a parallel plate photovoltaic device connected to a potentiometer. A phenomenon of photovoltaic amplification is formulated.

Solar Energy, 2009

... variation only in y-direction (vertical), being taken as lumped in other directions (x-axis a... more ... variation only in y-direction (vertical), being taken as lumped in other directions (x-axis and z-axis); (v) air properties are evaluated at film temperature of 300 K; (vi) negligible heat transfer from side walls/back panel of photovoltaic solar wall and room air zone; (vii) conduction ...

Natural Resources, 2011

The paper has analysed the state-of-art technology for a solar photovoltaic distributed energy so... more The paper has analysed the state-of-art technology for a solar photovoltaic distributed energy source appliance. The success of implementation of photovoltaic (PV) power project is increased when PV module system is integrated with building design process and is used as multi purpose appliance for use with building elements. The improvement in overall system efficiency of building integrated PV modules embedded in building façade is achieved by minimizing and capturing energy losses. A novel solar energy utilisation technology for generation of electric and thermal power is presented by integration of ventilation and solar photovoltaic device with the heating, ventilating and air conditioning (HVAC) system. The testing appliance named as photovoltaic duct wall was a wooden frame assembly of double wall with air ventilation: two adjacent glass coated PV modules, air column, plywood board filled with polystyrene and dampers. The measurement data is collected from various sensors to read measurements of solar intensity, ambient air temperature, room air temperature, electric power, surface temperatures of PV modules and plywood board, air velocities and air temperatures in the air column. The enhancement in the air velocity of the air column is fulfilled with an exhaust fan fixed in an outdoor room. The simulation model is used to perform the two dimensional energy analyses with applied one dimensional solution of steady state heat conduction equations. The bases of simulation model are conjugating energy travel paths with network boundary conditions of convection, radiation exchange, heat storage capacity, thermal storage capacity and heat transport.

Abstract:- The electrodynamics of a pair of photovoltaic (PV) modules with connected resistance d... more Abstract:- The electrodynamics of a pair of photovoltaic (PV) modules with connected resistance due to thermal mass of an outdoor room has been presented. The experiments were conducted on a pair of glass coated PV modules connected with a series electrical circuit through a rheostat. A steady state network model for a pair of PV modules connected with building resistive network has been proposed. The principles of electromagnetic wave theory have been applied to perform the energy balances on the discretised nodal elements in the network. The solution accuracy for prediction of temperatures at various nodes in the network is based on the magnitude and number of the connected resistances in the circuit, the smaller the shunt resistance value the greater has been the accuracy. Key-Words:- PV module, rheostat, amplifier, conductance, network model

Canadian Acoustics, 2007

A unified theory for stresses and oscillations is presented with an example of an external cavity... more A unified theory for stresses and oscillations is presented with an example of an external cavity wall made up of a parallel plate photovoltaic device. The stresses developed on a particle due to various forces are classified as fundamental stresses, internal stresses, and external stresses. The fundamental stresses are developed due to presence of gravitational and electromagnetic forces of a solar system. The internal stresses are developed under the influence of fundamental stresses and are defined by properties of composition of a particle. The external stresses are developed under an external source of energy. The theory is eligible for defining new criteria for generation of acoustic resonance to include waves propagated with transmission of light, sound, noise, heat, electricity, fluid, and fire from a cavity wall. A mathematical model also has been formulated for the theory based on field experiments conducted on a cavity wall with one degree of freedom.

The cost effectiveness of photovoltaic (PV) solar systems is improved when they are integrated in... more The cost effectiveness of photovoltaic (PV) solar systems is improved when they are integrated in the building envelope because a separate support and framing structure is not required. This thesis studies the performance of a facade section with PV modules forming the exterior facade layer and air being drawn into the facade behind the panels with the aid of a fan. The overall energy efficiency of the system may further be improved by passing outdoor air behind them to cool them and using this heated air in the building HVAC system. An added benefit of cooling the PV module with outside air is improvement of electrical conversion efficiency. A two-dimensional network model with control volume finite difference method (CVFDM) is developed. Two-dimensional nodal equations are developed for PV module, air and back panel control volumes. The upwind differencing scheme is used to obtain the control volume equations for the air control volumes. Automatic formulation of the thermal networ...

World Academy of Science, Engineering and Technology, International Journal of Medical, Health, Biomedical, Bioengineering and Pharmaceutical Engineering, 2017

A simulation model is proposed for integrated acoustic and thermo-fluid insulation constituting a... more A simulation model is proposed for integrated acoustic and thermo-fluid insulation constituting an airflow window with a photovoltaic (PV) solar wall spandrel section. The physical model of an outdoor test-room comprises of a wooden framed double or cavity wall assembly with: (i) a triple glazed fenestration section with a closed roller blind; (ii) a solar wall spandrel section of double-glass PV modules and back panel of polystyrene filled plywood board; and (iii) fan pressure based manually operated inlet and exhaust dampers with ventilation through exhaust fan for transportation of heat. A generalized two-dimensional analysis of a double wall structure is illustrated by placement of surface and air nodes into two adjacent stacks of control volumes representing outer and inner walls. Integrated noise insulation and energy conversion model is presented. The energy conversion and noise insulation model is supported with some numerical results using devised noise measurement equations.

Canadian Acoustics, 2008

International Journal of Social Sciences

Applied Energy, 2017

International Journal of Thermal Sciences, 2016

Natural Resources, 2013

Solar Energy, 2009

Natural Resources, 2011

Canadian Acoustics, 2007

World Academy of Science, Engineering and Technology, International Journal of Medical, Health, Biomedical, Bioengineering and Pharmaceutical Engineering, 2017

A method for simulation of solar energy devices connected to a building has been proposed. The so... more A method for simulation of solar energy devices connected to a building has been proposed. The solutions of one dimensional heat conduction and heat transport equations are obtained both with the new method as well as traditional method used for design and optimisation of solar energy devices. The proposed method has improved the accuracy of a traditional method by considering additional heat exchange paths of conduction and radiation so as to accurately predict mass flow rate through solar energy devices. The direct matrix inversion with a control volume finite difference procedure has been adopted in the proposed method. A discretisation procedure for location of composite surface and fluid nodes in the control volumes has been developed for obtaining the temperature solutions. The accuracy of the proposed method is a function of magnitude and number of heat transport and conjugate heat exchange conductance terms of conduction, convection and radiation. The proposed method has bee...

Book Publisher International, 2021

Monarchy of Concordia is a globalized society with objective of maintaining peace and harmony in ... more Monarchy of Concordia is a globalized society with objective of maintaining peace and harmony in the world by controlling human noise behavior. The Monarchy of Concordia has motto of “Controlling Human Noise Behavior” with guiding principles of energy perspectives in a society. Noise is defined as a sensation of unwanted intensity of a wave. It is perception of a pollutant and a type of environmental stressor. The unwanted intensity of a wave is a propagation of noise due to transmission of energy source waves (viz. physical agents) such as sun, light, sound, heat, electricity, fluid and fire. Human Noise Behavior is checked by identifying a source and a sink of noise i.e. a person making noise and a person affected by such noise. Full globalization requires the harmonization of trade regulations and laws across countries. Such harmonization would require a global government. To overcome all such barriers and national sovereignty issues, a globalized society for maintaining peace and harmony among nations through monitoring and controlling human noise behavior of the world came into existence by establishing sovereign political power of monarchy of Concordia. This monograph is focusing on socio-economic and ergonomics aspects of monitoring and controlling human noise behavior by establishing sovereign political power of Monarchy of Concordia. This monograph is elaborating sustainable development business models of socioeconomic aspects for monitoring and controlling human noise behavior in the sovereign political power of Monarchy of Concordia. Legislation aspects of controlling human noise behavior and climate change in monarchy of Concordia are briefly outlined in this monograph. Taxes and fines on noise behavior along with the discussions on various aspects of controlling human noise behavior are also elaborated in this monograph. Keywords: Monarchy of concordia; political power; human noise behavior; globalized society; energy. JEL Codes: P37, Q53, Q56, P18, I00.