Peter R. Armstrong
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View article: Validation of UWG and ENVI-met models in an Abu Dhabi District, based on site measurements
Validation of UWG and ENVI-met models in an Abu Dhabi District, based on site measurements Open
The city of Abu Dhabi is growing every year in population, urban extent and energy demand. This research focuses on the application of two simulation programs to estimate changes in urban climate associated with continued development in Ab…
View article: Nonintrusive Load Monitoring of Variable Speed Drive Cooling Systems
Nonintrusive Load Monitoring of Variable Speed Drive Cooling Systems Open
To improve the energy efficiencies of building cooling systems, manufacturers are increasingly utilizing variable speed drive (VSD) motors in system components, e.g. compressors and condensers. While these technologies can provide signific…
View article: A Study of Local Climate Zones in Abu Dhabi with Urban Weather Stations and Numerical Simulations
A Study of Local Climate Zones in Abu Dhabi with Urban Weather Stations and Numerical Simulations Open
In many cities that have experienced rapid growth like Abu Dhabi, urban microclimate scenarios evolve rapidly as well and it is important to study the urban thermal dynamics continuously. The Local Climate Zone (LCZ) classification conside…
View article: Validation of UWG and ENVI-Met Models in an Abu Dhabi District, Based on Site Measurements
Validation of UWG and ENVI-Met Models in an Abu Dhabi District, Based on Site Measurements Open
The city of Abu Dhabi is growing every year in population, urban extent and energy demand. This research focuses on the application of two simulation programs to estimate changes in urban climate associated with continued development in Ab…
View article: Feasibility of Controlling Heat and Enthalpy Wheel Effectiveness to Achieve Optimal Closed DOAS Operation
Feasibility of Controlling Heat and Enthalpy Wheel Effectiveness to Achieve Optimal Closed DOAS Operation Open
Dedicated outdoor air systems (DOAS) make use of the sensible and latent capacity of the return (exhaust) air to cool and dehumidify the supply (outside) air. “Closed DAOS” is an advanced form of typical DOAS with desuperheater and evapora…
View article: Standardizing accelerated aging testing conditions for silvered-glass reflectors
Standardizing accelerated aging testing conditions for silvered-glass reflectors Open
To assure the quality of accelerated aging tests for solar concentrators, their standardization is crucial. It guarantees the employment of adequate testing, measurement and characterization procedures and the comparability between results…
View article: Study and comparison of naturally-aged and As-received silvered-glass reflectors
Study and comparison of naturally-aged and As-received silvered-glass reflectors Open
Back-silvered glass mirrors exposed in Abu Dhabi outdoor conditions for 7 years along with corresponding as-received mirrors from the same manufacturing batch which were preserved in a warehouse are analyzed in the present study. The avail…
View article: Where should beam down heliostat central rays intersect the final optical element axis?
Where should beam down heliostat central rays intersect the final optical element axis? Open
A beam down solar system is adjusted to maximize the power collected through a final optical element concentrator. The power reaching the outlet of the final optical element is studied as a function of the reflectivity of its facets, and t…
View article: Testing of a secondary concentrator integrated with a beam-down tower system under non-liquid cooling strategies
Testing of a secondary concentrator integrated with a beam-down tower system under non-liquid cooling strategies Open
Three dimensional secondary concentrators are exposed to high radiation fluxes, part of which is absorbed by the reflecting material, leading to elevated wall temperatures which may cause reflectance degradation and mechanical distortion. …
View article: Thermal modelling and control of 130kw direct contact (salt/air) heat exchanger
Thermal modelling and control of 130kw direct contact (salt/air) heat exchanger Open
This work investigates the transient response of a certain type of direct contact heat exchanger (DCHX) that consists of packing (Raschig Rings) to increase the surface area for effective heat transfer between molten salt and air. Molten s…
View article: Techno-economic analysis of concentrated solar power plants in terms of levelized cost of electricity
Techno-economic analysis of concentrated solar power plants in terms of levelized cost of electricity Open
Levelized Cost of Electricity (LCOE) is an important metric which provides one way to compare the economic competitiveness of different electricity generation systems, calculated simply by dividing lifetime costs by lifetime production. Hi…
View article: Validation of an optical model applied to the beam down CSP facility at the Masdar Institute Solar Platform
Validation of an optical model applied to the beam down CSP facility at the Masdar Institute Solar Platform Open
In the framework of the CSPonD Demo project, the optical characterization of the Beam Down Optical Experiment (BDOE) heliostats field is an important step to certify the required power is provided. To achieve this goal, an experiment invol…
View article: Thermal modeling of a secondary concentrator integrated with an open direct-absorption molten-salt volumetric receiver in a beam-down tower system
Thermal modeling of a secondary concentrator integrated with an open direct-absorption molten-salt volumetric receiver in a beam-down tower system Open
An upward-facing three-dimensional secondary concentrator, herein termed Final Optical Element (FOE), is designed to be used in a beam-down tower in combination with an open volumetric direct-absorption molten-salt receiver tank acting sim…
View article: Validation of an optical model applied to the beam down CSP facility at the Masdar Institute Solar Platform
Validation of an optical model applied to the beam down CSP facility at the Masdar Institute Solar Platform Open
In the framework of the CSPonD Demo project, the optical characterization of the Beam Down Optical Experiment (BDOE) heliostats field is an important step to certify the required power is provided. To achieve this goal, an experiment invol…
View article: Performance measurements of new silicon carbide coated reflectors for concentrated solar power applications
Performance measurements of new silicon carbide coated reflectors for concentrated solar power applications Open
The new silicon carbide coated mirrors (SiC-mirrors) developed by Ibiden Co., Ltd. and tested at the Masdar Institute of Science and Technology offer several advantages in concentrated solar power (CSP) structure and operation. The purpose…
View article: The Masdar Institute solar platform: A new research facility in the UAE for development of CSP components and thermal energy storage systems
The Masdar Institute solar platform: A new research facility in the UAE for development of CSP components and thermal energy storage systems Open
Masdar Institute established a new solar platform dedicated to research and development of concentrated solar power (CSP), and thermal energy storage systems. The facility includes among others, state of the art solar resource assessment a…