Simon Rees
YOU?
Author Swipe
View article: Modeling district heating pipelines using a hybrid dynamic thermal network approach
Modeling district heating pipelines using a hybrid dynamic thermal network approach Open
A novel numerical method is presented for fast and accurate simulation of the dynamic thermal behavior of buried pipelines such as those in district heating systems. The model is based on a combination of a conduction response factor metho…
View article: Conduction Shape Factors for Thermally Active Retaining Walls
Conduction Shape Factors for Thermally Active Retaining Walls Open
The walls of a structure below the ground level can also be utilised for exchanging heat energy from shallow depths, thereby accessing shallow geothermal energy for indoor heating and cooling, in addition to their primary role of resisting…
View article: Experimental validation of the dynamic thermal network approach in modeling buried pipes
Experimental validation of the dynamic thermal network approach in modeling buried pipes Open
The transient behavior of buried pipe systems plays a significant role in many heating and cooling systems, particularly in thermal energy networks and ground heat exchangers. In this study, the dynamic thermal network (DTN) approach’s val…
View article: Heat recovery and thermal energy storage potential using buried infrastructure in the UK
Heat recovery and thermal energy storage potential using buried infrastructure in the UK Open
Dispersed space heating alone accounts for 40% of UK energy use and 20% of carbon dioxide (CO 2 ) emissions. Tackling heating and building cooling demands is therefore critical to achieve net-zero ambitions in the UK. The most energy-effic…
View article: Thermal energy transfer around buried pipe infrastructure
Thermal energy transfer around buried pipe infrastructure Open
Decarbonisation of heating is essential to meet national and international greenhouse gas emissions targets. This will require adoption of a range of solutions including ground source heat pump and district heating technologies. A novel ro…
View article: Modelling the Dynamic Thermal Response of Turbulent Fluid Flow Through Pipelines
Modelling the Dynamic Thermal Response of Turbulent Fluid Flow Through Pipelines Open
The transient behaviour of pipe systems is important in many forms of thermal system such as domestic hot water, building heating, cooling and district thermal networks. In this study, different approaches to modelling the dynamic thermal …
View article: Dynamic thermal response modelling of turbulent fluid flow through pipelines with heat losses
Dynamic thermal response modelling of turbulent fluid flow through pipelines with heat losses Open
The dynamic thermal behaviour of pipe systems is important in many heating, cooling and process systems and is further complicated where radial heat transfer and the thermal capacity of the pipe are significant. In this study, the ability …
View article: A response factor approach to modelling long-term thermal behaviour of energy piles
A response factor approach to modelling long-term thermal behaviour of energy piles Open
Predicting the long-term thermal performance of an energy pile ground heat exchanger system requires a computationally efficient model that captures the three-dimensional features and interacting thermal boundary conditions found in such s…
View article: A Model of a Diaphragm Wall Ground Heat Exchanger
A Model of a Diaphragm Wall Ground Heat Exchanger Open
Ground thermal energy is a sustainable source that can substantially reduce our dependency on conventional fuels for heating and cooling of buildings. To exploit this source, foundation sub-structures with embedded heat exchanger pipes are…
View article: Investigations into thermal resistance of tunnel lining heat exchangers
Investigations into thermal resistance of tunnel lining heat exchangers Open
Geothermal energy is a promising and sustainable source that can reduce current dependence on conventional fuels for thermal energy production. To exploit this source of energy thermo-active geostructures such as tunnel lining heat exchang…
View article: Literature Review for the Net Zero Industry Coalition heat decarbonisation roadmaps
Literature Review for the Net Zero Industry Coalition heat decarbonisation roadmaps Open
This data contains the sources consulted for, and key characteristics of, 87 pathways for decarbonisation of heating in the UK. These form the basis of a literature review carried out for the Net Zero Infrastructure Coalition, and summaris…
View article: Foundation wall heat exchanger model and validation study
Foundation wall heat exchanger model and validation study Open
Making use of foundation substructural elements as ground heat exchangers is an attractive option for larger non-residential buildings. An alternative to Energy Piles is to use wall substructures - so called diaphragm or screen walls - wit…
View article: Coherent beam combination of four holmium amplifiers with phase control via a direct digital synthesizer chip
Coherent beam combination of four holmium amplifiers with phase control via a direct digital synthesizer chip Open
We present the coherent beam combination of four 2100 nm holmium amplifiers with their phase controlled through acousto-optic modulators driven by the RF output of direct digital synthesizer chips. Phase alignment was achieved through the …
View article: Performance of Detached Eddy Simulation applied to Analysis of a University Campus Wind Environment
Performance of Detached Eddy Simulation applied to Analysis of a University Campus Wind Environment Open
This paper investigates the performance of a Detached Eddy Simulation (DES) turbulence modelling approach implemented in the open-source CFD library OpenFOAM to analysis of external flows in urban environments in the context of micro wind …
View article: Validation of a Detached Eddy Simulation (DES) Model in Complex Urban Environment
Validation of a Detached Eddy Simulation (DES) Model in Complex Urban Environment Open
This paper examines the performance of the Detached Eddy Simulation (DES) turbulence model implemented in the open source CFD library OpenFOAM for external flows in complex urban environments.The aim of this work is to provide a validation…
View article: High precision 96 µm CO_2 laser end-face processing of optical fibres
High precision 96 µm CO_2 laser end-face processing of optical fibres Open
Reproducible, precise cleaving of optical fibres is of great importance to the fibre laser and telecommunications industries. We present a novel approach to the end-face processing of optical fibres using a 9.6 µm CO2 laser to produce flat…
View article: Validation of vertical ground heat exchanger design methodologies
Validation of vertical ground heat exchanger design methodologies Open
[EN] This work presents a validation of two common methods for designing vertical ground heat exchangers. Both a simulation-based design tool and the ASHRAE handbook design equation are used to find design lengths for four different real s…
View article: ANNUAL SOLAR IRRADIATION MAPPING AND VISUALIZATION FOR COMPLEX GEOMETRIES
ANNUAL SOLAR IRRADIATION MAPPING AND VISUALIZATION FOR COMPLEX GEOMETRIES Open
We introduce an innovative approach to producing an- nual solar irradiation data for complex geometries in urban settings. The method uses advanced ray-tracing and ambient sampling approaches with cumulative sky models derived from hourly …