Maria Kolokotroni

Maria Kolokotroni
Brunel University London · Department of Mechanical and Aerospace Engineering

About

146
Publications
43,843
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
4,194
Citations
Citations since 2017
58 Research Items
2319 Citations
20172018201920202021202220230100200300400500
20172018201920202021202220230100200300400500
20172018201920202021202220230100200300400500
20172018201920202021202220230100200300400500

Publications

Publications (146)
Article
Characterising the inter-seasonal energy performance of buildings is a useful tool for a business to understand what is ‘normal’ for its portfolio of premises and to detect anomalous patterns of energy demand. When adding a new building to the portfolio, it will be useful to predict what will be the likely energy use as part of on-going monitoring...
Article
Full-text available
The quality of future working circumstances for many will be contingent on how low energy indoor spaces respond to challenges from accelerated ambient warming. Resilient cooling is increasingly relevant given the need to evaluate whether a building designed today is resilient against extreme disturbances to the thermal environment from events in th...
Chapter
Full-text available
This chapter describes the installation method of vacuum insulation panels (VIPs) externally on a demonstration wall in an operational residential building in the United Kingdom. The study assesses the effectiveness the VIPs in terms of the heat loss through the walls using temperature profiles measured in the demonstration application. The analysi...
Book
As the AIVC was created in 1979, the 40th anniversary of the AIVC was celebrated in October 2019 at the 40th AIVC conference in Ghent. In the context of this celebration, it was decided to publish 2 overview publications: An AIVC technote, which focuses on the overall history of the AIVC and those involved in the organisation (TN 69: 40 years to bu...
Article
Full-text available
The global effects of climate change will increase the frequency and intensity of extreme events such as heatwaves and power outages, which have consequences for buildings and their cooling systems. Buildings and their cooling systems should be designed and operated to be resilient under such events to protect occupants from potentially dangerous i...
Article
Full-text available
Plants have the ability to absorb and degrade VOCs (volatile organic compounds). Foliage can intercept particulate matter (PM) and thus, help to reduce its concentration in the air. Plants can be used as filters in indoor conditions adding an ecosystem service to the decorative purpose. A plant-based air filtration system that actively improves ind...
Article
Full-text available
Low concentrating photovoltaic (LCPV) systems offer viable solution for generating higher energy output per unit cell area compared to a typical flat PV panel, making them potential candidates for building retrofit. However, the best LCPV geometry for a given location is yet to be identified. The current study investigates the technical, economic a...
Article
The urban canyon albedo (UCA) quantifies the ability of street canyons to reflect solar radiation back to the sky. The UCA is controlled by the solar reflectance of road and façades and the street geometry. This study investigates the variability of UCA in a typical residential area of London and its impact on outdoor and indoor microclimates. The...
Chapter
This chapter introduces the book’s contents and its structure. It also includes a short description of why Ventilative Cooling (VC) is increasing in importance in a scenario where building cooling needs are growing. The building sector is responsible for about 40% of primary energy consumption; space heating, cooling and ventilation have proved to...
Chapter
This chapter first describes the relation between the potential of ventilative cooling to reduce building cooling loads and the role of thermal storage to achieve this; thermal storage could be sensible in the form of exposed thermal mass embedded in the structure of the building or latent in the form of phase change materials embedded in the struc...
Chapter
This chapter presents the urban microclimate impact on comfort and energy demand by buildings located in high-latitude temperate regions, characterised by higher heating demand compared to cooling. It focusses on London as a case study of such a location and presents results from measurements and computational studies during the last 20 years. The...
Article
Full-text available
Heat transfer between encapsulated PCM panels and air plays an important role in PCM-Air heat exchangers. A new design for the encapsulation panel was developed considering practical aspects such as the cost of production and ease of manufacturing, in addition to heat transfer and pressure drop. A number of encapsulated panel surfaces were first in...
Article
Full-text available
Buildings are known to be responsible for about a third of energy consumption in developed countries. This situation, together with the fact that the existing building stock is being renovated at a very slow pace, makes it crucial to focus on the energy retrofitting of buildings as the only way to reduce their contribution to these energy consumpti...
Book
This book includes the most recent outcomes from research and professional practice in the ventilative cooling field, gathered by the selected panel of authors. It provides essential contents to face and reduce the rise of space cooling and ventilation energy uses in buildings by alternative ventilation and cooling solutions. The book is organised...
Article
Full-text available
A Chinese traditional narrow street, named Cold-Lane, can create microclimatic zone that provides pedestrian thermal comfort under hot and humid climate conditions. This phenomenon was observed through experimental measurement during the summer of 2016. The heat transfer rate over the pedestrian body surface was calculated to reveal why the pedestr...
Article
Predicting the electricity consumption of proposed new supermarkets is helpful to design and plan future energy management. Instead of creating complex site-specific thermal engineering models, data-driven energy prediction models can be useful to energy managers. We have designed and implemented a data-driven method to predict the future ’electric...
Conference Paper
Through the ReCO2ST project, vacuum insulation panels have been installed on the demonstration building at Brunel University London and are being monitored for thermophysical performance. First results show monthly average temperatures in the range of 12.8 °C – 15.8 °C between the wall and the insulation layer when monthly average ambient temperatu...
Article
Full-text available
Low concentrating photovoltaic technologies (LCPV) for building application offer viable solutions in improving the conversion efficiency of solar cells leading to an improved electrical output per unit cell area required when compared to conventional solar photovoltaic modules. The current study explores the feasibility of different geometrically...
Conference Paper
Full-text available
The urban albedo (UA), defined as the ratio of the reflected to the incoming shortwave radiation at the upper edge of urban canyons, quantifies their ability to reflect solar radiation towards the sky. This research investigates the impact of real-world urban geometries and optical properties of facades and roads materials on the UA and street leve...
Conference Paper
Full-text available
This work investigates the potential of increasing the surface albedo of roads and buildings' facades for mitigating thermal stress in London over heatwave events. The results are based on microclimate simulations with ENVImet (V4.4.3), validated using air temperature and radiation data (incoming and reflected) measured in a case study area of Lond...
Article
Full-text available
Cool roofs save energy and are particularly suited for low rise buildings in hot climates. This paper presents results of potential energy savings for existing houses in two islands (Sicily and Jamaica) based on validated thermal models. It also presents the lifecycle environmental impact of the cool paint focussing on both the midpoint and endpoin...
Article
Full-text available
The energy performance of urban buildings is affected by multiple climate phenomena such as heat island intensity, wind flow, solar obstructions and infrared radiation exchange in urban canyons, but a modelling procedure to account for all of them in building performance simulation is still missing. This paper contributes to fill this gap by descri...
Article
Full-text available
High Concentrator Photovoltaic Thermal (HCPV/T) systems produce both electrical and thermal energy and they are efficient in areas with high Direct Normal Irradiance (DNI). This paper estimates the lifecycle environmental impact of the HCPV/T 2000x system for both electrical and thermal functionalities. Process-based attributional method following...
Article
Full-text available
This paper presents the development of a model based on efficiency equations to evaluate the performance of an HCPV/T system and compares its outputs with data of an operational case-study system installed in Palermo, Italy. The model is validated with data of the operational system to show real performance. The model can evaluate (a) the electric...
Conference Paper
Full-text available
The experimental work evaluated the thermal performance of a new panel design to encapsulate Phase Change Material (PCM) and compare this with an existing panel commercially available and incorporated within a PCM-Air heat exchanger system. The analysis was focused on the melting and solidifying time of the PCM within each panel design. It also foc...
Conference Paper
Full-text available
Recent data of energy consumption by supermarkets in the UK are presented and compared with existing benchmarks in the UK and data from other countries. It is shown that energy intensity has been reduced in large supermarkets (>750m 2 ) in recent years which is consistent with reductions in other countries due to installation of energy efficient te...
Article
Full-text available
This paper presents systematic design procedure and features of a sun simulator developed for testing low concentrating linearly focusing solar photovoltaic concentrators. The designed solar simulator comprises of a xenon short arc lamp and paraboloidal reflector for uniform radiative flux distribution on focal plane at desired radiation intensity....
Article
Full-text available
Predicting the electricity demand of new supermarkets will help with design, planning, and future energy management. Instead of creating complex site-specific thermal engineering models, simplified statistical energy prediction models as we propose can be useful to energy managers. We have designed and implemented a data-driven method to predict th...
Article
Full-text available
Recent data of energy consumption by supermarkets in the UK are presented and compared with existing benchmarks in the UK and data from other countries. It is shown that energy intensity has been reduced in large supermarkets (>750m²) in recent years which is consistent with reductions in other countries due to installation of energy efficient tech...
Conference Paper
Full-text available
This paper presents systematic design procedure and features of a sun simulator developed for testing low concentrating linearly focusing solar photovoltaic concentrators. The designed solar simulator comprises of a xenon short arc lamp and paraboloidal reflector for uniform radiative flux distribution on focal plane at desired radiation intensity....
Article
Full-text available
Cool roofs are most effective in reducing cooling loads and alleviating overheating in locations with high solar radiation and external air temperature. This paper presents results of an experimental study of a low income house in Jamaica and a computational study in three countries around the equator: Jamaica, Northeast Brazil (Recife) and Ghana....
Article
Full-text available
Hydrogen could be used as a ‘cleaner’ cooking fuel, particularly in communities that rely on biomass and fossil fuels, to reduce local pollution and related health effects. However, hydrogen must be produced using sustainable feedstocks and energy sources to ensure that local impacts are not reduced at the expense of other impacts generated elsewhe...
Article
Full-text available
Supermarkets are energy intensive buildings and present a unique space conditioning challenge because of the interaction between the HVAC system and the refrigerated display cabinets. HVAC system is the largest consumer of energy after refrigeration depending on system design, geographical location and controls. Night ventilation is used extensivel...
Article
Full-text available
Nearly Zero Energy Buildings (nZEB) are a significant part of the energy efficiency strategy of the European Union. As buildings represent approximately 40% of the final energy use in Europe, the reduction of their energy demand is key for a sustainable future. This paper takes a qualitative approach and presents data about professional and market...
Article
Full-text available
Latent Thermal Energy Storage (LTES) is a promising solution to reduce cooling energy consumption in buildings. Laboratory and computational studies have demonstrated its capabilities while commercial passive and active systems are available. This paper presents data and analysis of the performance of an active LTES ventilation system in two case-s...
Conference Paper
Full-text available
CFD simulations were conducted to assess turbulent forced convection heat transfer and pressure drop through a ventilation channel using a stack of panels with different ridge configurations containing Phase Change Material (PCM). First, an experimental rig using an existing commercial panel provided by a PCM manufacturer validates the model simula...
Conference Paper
Full-text available
A literature review has revealed that there is a very limited number of numerical or experimental studies of the air flow for mechanically ventilated large occupied rooms. Existing literature suggests that a room with more than 5 meters floor-to-ceiling height can be considered as a large space. The aim of this paper is to present a set of detailed...
Article
Full-text available
In this paper the impact on the store’s energy use by different refrigeration systems, remote and centralised, is investigated as well as their environmental impact. The study is performed using the energy simulation program EnergyPlus in a reference baseline model which has been verified against measured energy and environmental conditions data. T...
Article
Full-text available
Energy use intensity in supermarkets is high compared to retail buildings due to the refrigeration needed for the preservation of chilled and frozen products. The modelling of their energy use and environmental conditions is difficult due to the interdependence of their subsystems such as refrigeration, heating/cooling, ventilation, lighting and re...
Article
Full-text available
A computational analysis of the impact on energy use of green and cool roofing techniques applied to a typical steel goods storage building in five distinct climates whilst considering the local thermal building practice of each region is presented. The green roof simulations show a consistently positive impact on energy efficiency. The cool roof s...
Article
This paper evaluates one option to replace traditional cooking fuels in developing economies with a flexible, modular and clean solution of solar hydrogen, based on a numerical and experimentally tested system to address technical and safety issues. The study focuses on Ghana, Jamaica and Indonesia as examples of developing economies using fossil f...
Conference Paper
Full-text available
Computer classrooms present challenges for cooling because internal heat gains higher than typical classrooms. Focused on thermal comfort, this paper presents the results of a field and computational study of a computer seminar room in west England. A mechanical ventilation system with phase change materials thermal storage has been installed in th...
Article
Adopting natural ventilation as a low impact retrofit strategy for space cooling is attractive due to the cooling potential of untreated outdoor air for large periods of the extended cooling season, particularly in northern climates. Furthermore, it is important to characterise the performance of natural ventilation components in successfully trans...
Article
Full-text available
One-year monitoring results of environmental conditions in a UK seminar room where the Cool-phase® ventilation and PCM battery system has been installed indicate thermal comfort and good indoor air quality throughout the year. CFD analysis indicates that air temperature and air distribution is uniform at occupants’ level.
Article
Full-text available
Ventilative cooling coupled with exposed thermal mass is widely accepted as an important strategy for reducing summer overheating in non-domestic buildings. Extended monitoring has shown that naturally ventilated buildings typically use less than 50% of the corresponding energy consumption of air conditioned buildings and assessment of ventilative...
Conference Paper
Full-text available
Food catering is a very resource intensive activity. In the UK, catering facilities are responsible for approximately 24 TWh/year energy use, which represents approximately 13% of total energy use by non-domestic buildings. Of this, 26% (6.24 TWh) is used by catering processes, primarily cooking and refrigeration. It is also estimated that more tha...
Article
This paper describes the development of a semi-empirical numerical model for a solar hydrogen system consisting of a proton exchange membrane electrolyser (PEM) powered by photovoltaic panels to produce hydrogen as fuel for cooking applications, focussing on Jamaica as a suitable case-study. The model was developed in TRNSYS and includes a novel nu...
Article
Full-text available
This paper presents the results of two field studies to examine the differences in ambient temperatures in a micro-scale environment (at distances of 50–200 m between measuring points) in two different climates during typical summer weather conditions at two similar sites in terms of construction and activities. The analysis considered the land use...