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Paul Howard Riley

Paul Howard Riley
Semi-Retired

PhD

About

43
Publications
56,875
Reads
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164
Citations
Introduction
Lightweight power electronics for battery powered EV applications. following on from our BIPED research, we have demonstrated a battery powered propellor for aircraft.
Additional affiliations
March 2007 - July 2013
University of Nottingham
Position
  • Score Project Director
Education
September 1972 - June 1976
University of Salford
Field of study
  • Electronic Communications

Publications

Publications (43)
Article
Full-text available
Over two billion people world-wide cook on an open fire stove [1], do not have access to electricity, and would benefit from an off-grid electrical supply [2], [3]. Score, www.score.uk.com, is a $4M, fiveyear project to research a cooking stove that will generate electricity and cooling and is aimed primarily at poor people in developing countries...
Article
Full-text available
The reported discrepancy between theory and experiment for external combustion Stirling engines is explained by the addition of thermal resistance of the combustion gasses to the standard Carnot model. In these cases, the Stirling engine ideal efficiency is not as is normally reported equal to the Carnot cycle efficiency but is significantly lower....
Conference Paper
Full-text available
Multi-Level Converters powered by batteries have been known for over 20 years. Recently, interest in Modified Multi Level Converters M2LeC for Electric Vehicles has increased due to their inherent ability to fast charge batteries; no extra power electronics are required for charging, thus dramatically reducing infrastructure costs. The BIPED fe...
Data
Calculates the source energy consumption of various modes of transport, including walking, cycling, EV, e-Plane, Diesel train and bus
Conference Paper
Full-text available
The paper will present a compelling argument that battery powered aircraft are more suited to high-speed transport than rail from a financial, environmental and customer experience perspective. Several companies are developing 150 mile up to 19-seater aircraft that are much lower cost that conventional aircraft and can compete favourable with conve...
Presentation
Full-text available
History of batteries past and present with modern applications and selected recent research. Given to the Society of Model and Experimental Engineers https://www.sm-ee.co.uk SMEE was formed in 1898 to allow model engineers to exchange experiences and ideas for their mutual benefit.
Article
Recent developments of thermoacoustic engines have demonstrated that thermoacoustic technology is a viable option for waste heat recovery and low-cost electricity generation, Thermoacoustic technology is capable of converting low-grade heat to electrical power with only one moving part. Great reliance has been placed on evenly heated cores of multi...
Conference Paper
Full-text available
Vision: reinvent gliding with electric propulsion to greatly increased flexibility of usage. Especially for pilot training as a First Step towards electric aviation. Tested using two use cases: Motoring for take off & climbing (2 rotors) and battery charging
Preprint
Full-text available
The advancement of ePlanes that produce zero emissions at point of use has opened a new possibility for low carbon transport. New high-speed train routes such as HS2 in the UK although electrically driven have a significant impact on the environment due to removal of trees and other geographical impact. An analysis of battery powered ePlanes has sh...
Article
Full-text available
A Cascade H Bridge (CHB) is evaluated for both electric vehicle motor traction control and off-vehicle charging against the Power ElectronicsUK Automotive Challenge for cost and mass for the year 2035. By combining the power electronics with batteries using low-voltage MOSFET transistors in a series cascade arrangement the cost and mass targets cou...
Presentation
Full-text available
“Enabling 50+ kg weight reductions in power electronics for charging with distributed and integrated electronic systems”: Today’s architectures typically imply centralised Power Electronics (PE), long high current battery cables, single motor, heat management liquid cooled and High-voltage bus-bar, packaging PE with the motor. We will discuss the...
Conference Paper
Full-text available
This paper presents an analytical and experimental investigation of an electricity generator that employs a two-stage looped tube travelling-wave thermoacoustic prime-mover to deliver acoustic power from heat energy, a loudspeaker to extract electricity from sound energy and a tuning stub to compensate the changes in the acoustic field within the e...
Conference Paper
Full-text available
This article describes a novel design and construction of a helical tube flash boiler that uses a 2kW nominal methylated spirit burner to heat an approximately 2.5m long coil of copper pipe fed by a nominal 8 bar electrically operated solenoid water pump. The final embodiment is for superheated steam to be converted to electricity and the waste exi...
Conference Paper
Full-text available
Novel vehicle topology for power electronics called BIPED. Can be used for Rapid Replacement batteries to save vehicle mass, cost and reduce charging infrastructure costs
Patent
An integrated battery and Power Electronics system using multi-level inverters in a distributed format that performs as either motor controllers or charging functions without the need for external power electronics. No high voltages are present when the vehicle is stationary and multiple interlocks ensure electrical safety during vehicle and chargi...
Article
Full-text available
The Score-Stove™ generates electricity from a wood-burning cooking stove using a thermo-acoustic engine that converts heat to sound through a Linear Alternator (LA). This paper introduces a prototype hemi-toroidal suspension that was refined into a segmented trapezoidal shape that gave a higher cyclic life for the linear alternator and includes a c...
Conference Paper
Full-text available
The efficiency of thermo-electric (TE) modules is usually specified between two temperatures when powered by a constant temperature source for example electrical heating. By modelling heat flow and temperatures across the thermal resistances of the heat source as well as the TE module and heat exchangers, this paper shows that the specified efficie...
Conference Paper
Full-text available
An electricity-generating stove using thermo-acoustic phenomena was introduced by SCORE team UK in 2007 and later a modified version of the stove was adopted by BUET SCORE team in 2013 which could use both pressurized kerosene burner and wood. The prototype was first tested in the laboratory and then demonstrated to potential end users in several r...
Patent
The present invention relates to electricity generation using Photo-Voltaic (PV) cells with associated battery storage of energy as used in mains off-grid or grid-connected supplies whether single or poly-phase applications. A plurality of identical modules , with each module comprising a Photo-Voltaic panel, battery storage and microprocessor cont...
Conference Paper
Full-text available
Score-StoveTM a clean-burning cooking stove that also generates electricity was tested using a pressurized kerosene burner. The Score-Stove works on the principle of thermo-acoustics to generate small-scale electricity. The device having hot-end, cold-end and regenerator acts in a way similar to a Stirling cycle generating acoustic power, which is...
Conference Paper
Full-text available
A clean-burning cooking stove that also generates electricity (The Score-StoveTM) was modified to enable evaluations to take place in 3 regions of Bangladesh. Using the principle of thermo-acoustics to generate electricity it can supply power for applications such as - LED lighting, mobile phone charging and radios particularly in rural areas witho...
Article
Full-text available
h i g h l i g h t s Clean cookstoves that also generate electricity improve affordability. Excel spreadsheet model to assist stakeholders to choose optimum technology. Presents views for each stakeholder villager, village and country. By adding certain capital costs, affordability and sustainability are improved. Affordability is highly dependent o...
Article
Full-text available
A design of the thermo-acoustic engine to combustion interface of an electrically generating clean cookstove is presented. Social surveys carried out by the SCORE project have indicated that adding electrical generation to a clean cookstove should increase their uptake considerably above the current 8% level (outside China) as electricity is percei...
Thesis
Full-text available
The PhD describes the social science and technical design of an innovative clean cooking stove that also generates electricity for use in developing countries. Key areas of learning adding to the research pool are: 1. Method for comparing costs of competing designs early in the research process before detailed design has been undertaken. 2. Use o...
Conference Paper
Full-text available
An electrical analogue of a looped-tube, thermoacoustic engine is presented and simulated using a graphical input, off-the-shelf network analysis tool called Tina™. The analyses are able to show both transient and non-linear behaviour. The recently documented phenomenon from the Score-Stove project of amplitude modulation of the pressure wave, call...
Article
Full-text available
This paper focuses on the design issues of a thermo-acoustically driven low-cost linear alternator for the SCORE project. SCORE (www.score.uk.com) aims to improve the quality of life around 2 billion poor people in the rural communities of the developing countries. The advantage of the double Halbach array permanent magnet moving coil alternator st...
Conference Paper
Full-text available
Over 1.4 billion people have no electricity, 3 billion cook on an open fire. The Score-Stove is a clean cooking stove that also generates electricty for use in developing countries. This presentation gives a background to the the conference and an overview of the 5 year Score project that complete in 2012.
Article
Full-text available
The early low-cost, wood burning Thermo-Acoustic Engine (TAE) known as Demo2.0-build-1 was developed by SCORE™ at the UK Centre and was capable of achieving 22.7 Watts of electricity. This prototype was limited to an operating temperature of about 300oC and due to excessive leaks could not operate continuously above ambient pressure. To absorb a th...
Article
Full-text available
This paper presents the development and assessment of two low-cost, travelling wave, thermoacoustic generators operating by waste heat energy from cooking stove. One powered by waste heat from a propane-driven stove, the other powered by waste heat from a wood-burning stove. The propane-driven thermoacoustic generator was successfully demonstrated...
Patent
Full-text available
Low-cost conversion of acoustic energy from for example a thermoacoustic engine is performed by a moving-coil linear alternator. By means of a dual Halbach array, this invention increases the efficiency of conversion from acoustic to electric power compared with conventional moving coil transducers. As well as a higher magnetic field strength due t...
Patent
Full-text available
Heat exchangers can be utilised in thermo-acoustic engines to facilitate through acoustic oscillations electrical power generation via linear alternators and/or cooling effects. Provision of a heat exchanger arrangement 31 which can be associated with a traditional open flame stove utilised in third world countries would be advantageous. However, s...
Article
Full-text available
SCORE is a wood burning stove that will cook food, generate electricity and cooling for use in developing countries by means of thermoacoustics. The consortium of Nottingham (Lead), Manchester, Queen Mary, Imperial and City universities with the charity Practical Action, believe that the very demanding cost targets can be achieved by using thermo-a...
Patent
Full-text available
A data processing method and a computer based data processing system for use in providing, or optimising, an industrial procedure for generating a product. The system comprising digital processing means, and digital storage means. The storage means having a database stored therein comprising (a) data defining generic product descriptions in terms o...
Patent
Full-text available
For flight safety reasons in gas turbine aeroengines it is desireable that in the event of malfunction of an electronic control system--such as a fuel control system--caused, for example, by overheating due to fire, the control system should protect the engine and the aircraft against the consequences of such a malfunction. In the present invention...
Patent
Full-text available
For flight safety reasons in gas turbine aeroengines it is desireable that in the event of malfunction of an electronic control system--such as a fuel control system--caused, for example, by overheating due to fire, the control system should protect the engine and the aircraft against the consequences of such a malfunction. In the present invention...
Article
Full-text available
The measurement of both slowly and rapidly changing quantities such as temperature, static and dynamic strain at 27,000 g and elevated temperatures, is discussed. The causes of interference in telemetry of moving parts include phase modulation, transducer wire pickup, amplitude modulation of the recieved RF signal, and frequency modulation of the t...

Questions

Questions (5)

Network

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Projects

Projects (8)
Project
Reducing the mass of power electronics by a factor of 10 by integrating the Power Electronics with the battery at a low cost, for use in all transport systems, particulary aerospace, land and water based systems.
Project
Multi-Level Converters have many benefits for electric vehicles, land air and sea. This project aims to improve electric vehicles with new Power Electronics topologies.