Mohamed Hamdy

Mohamed Hamdy
Norwegian University of Science and Technology | NTNU · Department of Civil and Environment

PhD, MSc., Eng.,

About

59
Publications
27,491
Reads
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2,419
Citations
Introduction
Mohamed Hamdy is an energy engineer. His ambition is to develop a generic simulation-based optimization tool for design cost-effective nearly-Zero energy buildings.
Additional affiliations
August 2016 - December 2019
Norwegian University of Science and Technology
Position
  • Professor (Associate)
December 2013 - April 2016
Aalto University
Position
  • PostDoc Position
May 2008 - present
Aalto University
Position
  • Combining Simulation and Optimisation for Dimensioning Optimal Building Envelopes and HVAC Systems
Description
  • The current work introduces suitable methods and techniques that attempt to carry out time-efficient multivariate explorations and transparent multi-objective analysis for optimizing complex building design problems.
Education
November 2004 - July 2007
Helwan University
Field of study
  • Mechanical Power engineering: '' Optimization of HVAC Control System at Different Loads in Office and Hotel Buildings''

Publications

Publications (59)
Conference Paper
Full-text available
Overheating in buildings is identified as an essential cause of several problems ranging from thermal-discomfort and productivity reduction to illness and death. The aim of this study is to assess the overheating risk in dwellings considering the diversity in dwelling designs and operations as well as the expected changes in climate. The overheatin...
Article
The cost-optimal solutions for a new office building in Finland are obtained. The EBPD comparative framework methodology is followed. Biomass CHPs with high overall efficiency and low P/H ratio are economically viable. Biomass CCHPs do not have economic or environmental benefits over biomass CHPs. Extending the cost-optimal solutions by PV system y...
Article
Full-text available
While there are ambitious targets to increase the share of renewable energy technology implementations in the different EU-states, it is 12 increasingly recognized that social acceptance may form a factor constraining the expansion of their implementation and use. In order to 13 investigate the Finnish social acceptance towards renewable energy tec...
Conference Paper
Full-text available
This paper introduces a new software developed for building performance optimization. MOBO is a generic freeware able to handle single and multiobjective optimization problems with continuous and discrete variables and constraint functions. It can be coupled to many external (simulation) programs. It has a library of different types of algorithms (...
Conference Paper
Full-text available
Finding cost-optimal solutions for nearly-zero energy buildings (nZEB) according to the new recast of the European Energy Performance of Buildings Directive EPBD- recast 2010 is a challenging task that requires exploring numerous possible combinations of energy-saving and energy-supply measures. Multiobjective simulation-based optimisation can be e...
Conference Paper
Full-text available
Buildings are designed, constructed, and operated with a high dependence on mechanical systems to maintain their expected thermal performance. However, disturbances such as power failure can strongly affect their thermal performance, specifically during heat waves. Building retrofit can be served as an innovative path not only for boosting energy e...
Article
Full-text available
Over the last decades overheating in buildings has become a major concern. The situation is expected to worsen due to the current rate of climate change. Many efforts have been made to evaluate the future thermal performance of buildings and cooling technologies. In this paper, the term “climate change overheating resistivity” of cooling strategies...
Conference Paper
The most sustainable building operation is that presents a minimum primary energy consumption, which minimizes the environmental impact. Therefore, the objective of this paper is to optimize the passive envelope design of the multi-family apartment building in Algeria for reducing heating and cooling energy consumption. 12 representative cities are...
Conference Paper
Full-text available
The purpose of this paper is to look at the indicators to which a city can be considered to be a smart city based upon the degree it meets specific indicators within the categories of 'Social Smartness', 'Technological Smartness' and 'Environmental Smartness'. The data collection for this paper was conducted through desk research in academic and no...
Article
The resilient building design has become necessary within the increasing frequency and intensity of extreme disruptive events associated with climate change. Since thermal comfort is one of the main requirements of occupants, evaluating building resilience from a thermal perspective during and after disruptive events is necessary. Most of the exist...
Article
Full-text available
All-electric buildings are playing an important role in the electrification plan towards energy-neutral smart cities. Batteries are key components in all-electric buildings that can help the demand-side energy management as a flexibility asset and improve the building survivability in the case of power outages as an active survivability asset. This...
Article
Full-text available
The concept of climate resilience has gained extensive international attention during the last few years and is now seen as the future target for building cooling design. However, before being fully implemented in building design, the concept requires a clear and consistent definition and a commonly agreed framework of key concepts. The most critic...
Technical Report
Full-text available
As part of the EBC Annex 80 - Resilient cooling of buildings activities, the Thermal Condition Taskforce was created, in April 2020. In coordination with all other groups and the Weather Data Taskforce, two objectives were set by the Annex leader Dr. Peter Holzer. Firstly, to define common thermal conditions to assess different cooling technologies...
Article
Full-text available
Improving the energy efficiency of existing buildings by implementing building automation control strategies (BACS) besides building envelope and energy system retrofitting has been recommended by the Energy Performance of Buildings Directive (EPBD) 2018. This paper investigated this recommendation by conducting a simulation-based optimization to e...
Article
Systematic interactions between buildings, vehicles, and renewables can increase eco-economic viability on a neighbourhood scale. In this study, an interactive buildings-vehicles energy sharing network with multidirectional energy interactions was formulated for energy interactions and integrations together with a grid-responsive strategy for the m...
Article
Full-text available
The interest to find cost-optimal zero-energy solutions for building, using multi-objective optimization, has risen dramatically over the last decade. Accordingly, several studies have been carried out, proposing new methods and tools. None, however, has introduced a simplified approach that is viable by a broader range of users. This study address...
Article
Full-text available
Considering the diverse uncertainties in building operations and external factors (i.e., occupancy and weather scenarios that can impact a building’s energy and comfort), performance robustness has become as important as the building performance itself. Selecting a robust and high performance building design is challenging, particularly when multip...
Article
Building Energy Model (BEM) calibration is the process of reducing the gap between the simulation outputs and the actual measured data at the same conditions. The literature shows that BEM calibration approaches could lead to a significant error in the model inputs even the calibration has been conducted successfully based on the model outputs (i.e...
Article
Full-text available
In this study, the energy savings and cost-effectiveness of building automation measures in a retrofitting context are evaluated for a Norwegian single-family house. In addition, two methods for calculating savings from implementing building automation control systems (BACS) are compared: energy performance simulation and the BACS factor method pro...
Article
Full-text available
There is a need for methodologies that integrate energy simulation and cost calculation to assess grid rent business models as incentive for demand-side management(DSM) in buildings. Despite the proliferation of energy simulation and cost calculation tools, there are no tool(e.g., software program) with appropriate methodology that caters specifica...
Article
Full-text available
Using firewood as a space heating source is a popular solution in Norwegian housing and can significantly reduce the electrical energy demand of houses. This study analysed habits and reasons for using a wood stove from survey data. From this, typical behaviour patterns were defined. These patterns were imported into a building performance simulati...
Article
Full-text available
Optimal ventilation strategies are fundamental to achieve net/nearly-zero energy buildings. In this study, three hybrid ventilation control strategies are proposed to minimize the cooling need in an open-plan office building, located in the center of Glasgow (Scotland). The performance of the three proposals is assessed by IDA ICE (a whole building...
Research Proposal
Full-text available
A special issue of Sustainability (ISSN 2071-1050). This special issue belongs to the section "Sustainable Engineering and Science". Special Issue Information Dear Colleagues, You are already well aware that building energy optimization and sustainable development are on the same track. The building sector highly affects the critical issues of ou...
Article
Full-text available
Green façades or vertical greenery systems (VGSs) are continuously gaining attention among urbanists for improving the living comfort and energy efficiency in urban areas. However, modeling and simulating the thermal response of VGSs remains a research topic. This paper introduces a novel inverse modeling approach for modeling the thermal response...
Chapter
Green buildings are environmentally bearable and economically viable buildings that are designed, constructed, and operated in order to minimize their environmental impact on the planet and maximize the quality of human life. Achieving a green building is hence a wide, complex, and ambitious challenge that requires close cooperation of all the stak...
Chapter
Green buildings are environmentally bearable and economically viable buildings that are designed, constructed, and operated in order to minimize their environmental impact on the planet and maximize the quality of human life. Achieving a green building is hence a wide, complex, and ambitious challenge that requires close cooperation of all the stak...
Article
Full-text available
Through monitoring of buildings, it can be proven that the performance of envelope elements and energy supply systems deteriorates with time. The results of this degradation are higher energy consumption and life cycle costs than projected in the building design phase. This paper considers the impacts of this deterioration on the whole building ene...
Article
Full-text available
During the building operation phase, it is recognized that the performance of building envelope elements and energy supply systems drops with time. This performance degradation usually leads to lower energy efficiency and higher life cycle costs than predicted in the early design phase. This paper quantitatively reviews the impacts of this deterior...
Article
Full-text available
Lighting energy consumption represents a significant percentage of total energy consumption in residential building sector. During the last 20 years, advanced energy-efficient lighting fixtures have been introduced worldwide to conserve the energy consumption in residences. In the Middle East and North Africa (MENA) region, very few studies have be...
Article
Full-text available
Building energy design is a multi-objective optimization problem where collective and private perspectives conflict each other. For instance, whereas the collectivity pursues the minimization of environmental impact, the private pursues the maximization of financial viability. Solving such trade-off design problems usually involves a big computatio...
Article
Overheating in buildings has been identified as an essential cause of several problems ranging from thermal discomfort and productivity reduction to illness and death. Overheating in buildings is expected to increase as global warming continues. The risk of overheating in existing and new buildings can be reduced if policy makers take decisions abo...
Article
The application of renewable energy technologies (RETs) in the residential building sector requires acceptance of technical solutions by key stakeholders, such as building owners, real-estate developers, and energy providers. The objective of this study is to identify the current status of public perceptions of RETs that are available in the Finnis...
Article
Full-text available
Integrated building design is inherently a multi-objective optimization problem where two or more conflicting objectives must be minimized and/or maximized concurrently. Many multi-objective optimization algorithms have been developed; however few of them are tested in solving building design problems. This paper compares performance of seven commo...
Article
According to the Energy Performance of Buildings Directive (EPBD) Recast, building energy retrofitting should aim "to achieving cost-optimal levels". However, the detection of cost-optimal levels for an entire building stock is a complex task. This paper tackles such issue by introducing a novel methodology, aimed at supporting robust cost-optimal...
Chapter
Full-text available
This chapter presents implementations of simulation-based optimization by giving two examples for finding optimum values of design/decision parameters in the building envelope, building heating/cooling systems, and energy systems. In addition, the features of the multi-objective building performance optimization program (MOBO®) are presented. MOBO...
Article
Full-text available
According to the European Energy Performance of Buildings Directive (EPBD-2010/31/EU), all EU-Member states are obliged to continuously apply analysis on cost-optimal levels of minimum energy performance requirements towards nearly/net zero energy buildings. To perform such techno-economic analysis, a large number of technical/financial assumptions...
Conference Paper
Full-text available
Nowadays, we can come across different concepts related to Zero-Energy Buildings. Despite having common perspectives for reducing the environmental impacts, the methods and specific targets are different in different concepts. This paper reviews the terminology and calculation methods used in the two concepts of Net-Zero Energy Buildings (NZEB) and...
Chapter
Full-text available
Building performance optimization (BPO) paired with building performance simulation (BPS) is a promising solution for evaluating many different design options and obtaining the optimal or near-optimal solution for a given objective or combination of objectives while complying with constraints. This chapter discusses major obstacles to BPO in the bu...
Conference Paper
Full-text available
The HVAC research group at Aalto University (former Helsinki University of Technology) has been developing combined use of building simulation and optimisation since the beginning of this millennium. The first trials were simple single-objective problems but soon the approach was changed into multi-objective. From the beginning, the goal has been t...
Article
Full-text available
While there are ambitious targets to increase the share of renewable energy technology implementations in the different EU-states, it is increasingly recognized that social acceptance may form a factor constraining the expansion of their implementation and use. In order to investigate the Finnish social acceptance towards renewable energy technolog...
Conference Paper
Full-text available
This paper summarizes a study that was undertaken to reveal potential challenges and opportunities for integrating optimisation tools in Net/Nearly Zero Energy Buildings (NZEB) Design. The paper reviews current trends in simulation-based Building Performance Optimisation (BPO) and outlines major criteria for optimisation tools selection and evaluat...
Article
Full-text available
This paper summarizes a study undertaken to reveal potential challenges and opportunities for integrating optimization tools in net zero energy buildings (NZEB) design. The paper reviews current trends in simulation-based building performance optimization (BPO) and outlines major criteria for optimization tools selection and evaluation. This is bas...
Article
Finding cost-optimal solutions towards Nearly-Zero-Energy Buildings (nZEBs) in accordance with European Energy Performance of Buildings Directive (EPBD-Recast 2010) is a challenging task. It requires exploring a huge number of possible combinations of energy-saving measures (ESMs) and energy-supply systems including renewable energy sources (RES),...
Article
Full-text available
This paper summarizes a study that was undertaken to reveal potential challenges and opportunities for integrating optimisation tools in Net/Nearly Zero Energy Buildings (NZEB) Design. The paper reviews current trends in simulation-based Building Performance Optimisation (BPO) and outlines major criteria for optimisation tools selection and evaluat...
Thesis
Full-text available
Responding to the international calls for high energy performance buildings like nearly-zero energy buildings (nZEB), recent years have seen significant growth in energy-saving and energy-supply measures in the building sector. A detailed look at the possible combinations of measures indicates that there could be a huge number (possibly millions) of...
Conference Paper
Full-text available
This paper provides an overview of the use of building performance simulation (BPS) among the building design professionals in Egypt. To assess the situation and highlight the status and difficulties encounter in the usage and the needs for BPS tools, three workshops were held, in July and August 2010 in Cairo. The paper first presents a brief over...
Article
Recently adaptive thermal-comfort criteria have been introduced in the international indoor-climate standards to reduce the heating/cooling energy requirements. In 2008, the Finnish Society of Indoor Air Quality (FiSIAQ) developed the national adaptive thermal-comfort criteria of Finland. The current study evaluates the impact of the Finnish Criter...
Conference Paper
Full-text available
In 2008, the Finnish Society of Indoor Air Quality (FiSIAQ) has introduced new criteria for the thermal comfort classes (S1, S2, and S3). The criteria stipulate adaptive model based on 24 houraverage outdoor air temperature. The maintenance of particular comfort level is linked to energy consumption and consequent energy cost. The current study use...
Article
Recently adaptive thermal-comfort criteria have been introduced in the international indoor-climate standards to reduce the heating/cooling energy requirements. In 2008, the Finnish Society of Indoor Air Quality (FiSIAQ) developed the national adaptive thermal-comfort criteria of Finland. The current study evaluates the impact of the Finnish Criter...
Article
Modern buildings and their HVAC systems are required to be not only energy-efficient but also produce fewer economical and environmental impacts while adhering to an ever-increasing demand for better environment. Research shows that building regulations which depend mainly on building envelope requirements do not guarantee the best environmental an...
Conference Paper
Full-text available
This paper presents implementations of automatic simulation-optimisation with search techniques for single and multi-objective designs of buildings. Four cases are studied with various design variables in the building envelope (external wall, roof, floor, glazing, tightness, shadings etc), HVAC system (equipment size and type, operating temperature...
Conference Paper
Full-text available
Reducing the heating, cooling, ventilation and lighting energy is an environmental target for buildings in sustainable communities. However this should to be achieved without compromising the required level of indoor wellbeing. In 2008, the Indoor Climate Classification of Finland has introduced strict definitions for higher thermal comfort categor...
Article
Full-text available
This paper deals with a multi-objective optimisation problem where the objective is to minimise CO2-eq emissions and investment cost of a multi-zone single-family house and its heating/cooling systems. Eight design variables are subjected to study: level of building tightness, insulation thickness of the external wall, floor and roof, type of windo...
Conference Paper
Full-text available
Recently, a combination between simulation and optimisation has been important for many of HVAC design problems. Long execution time is usually needed for one simulation run; consequently huge time will be required for the optimisation process. The aim of this study is to evaluate how combinations between optimisation algorithms can achieve faster...

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Projects

Projects (5)
Project
This research questions the status-quo in building regulation and design about overheating risks and provides help to policy-makers in the design of measures to protect the most fragile and often isolated population. On the strategical level, this project aims at contributing to a better society by indicating the vulnerability of occupants in the indoor environment to the projected impacts of climate change. By the vulnerability classification of Walloon buildings, the research provides information on if, when and where adaptation measures are needed. The project also provides the necessary basis to evaluate and prioritize the adaptation measures. The project is aimed at safeguarding human health, comfort and productivity inside buildings despite a changing climate, and to achieve this in the most sustainable way, i.e. without compromising climate change mitigation efforts. The overarching aim is to provide guidance for the policy of local, provincial and regional governments in, among others, spatial planning, energy security and public health. Many stakeholders can be identified, such as local governments, urban designers and planners, health services, housing corporations, buildings engineers, architects and energy companies. Specific stakeholders that will be engaged in this project, but also other parties, include (Liege, Charleroi, Namur, and Brussels).
Project
The world is facing a rapid increase in the air conditioning of buildings. This is driven by multiple factors, such as urbanization and densification, climate change, and elevated comfort expectations together with economic growth in hot and densely populated climate regions of the world. The trend towards cooling seems inexorable therefore it is mandatory to guide this development towards sustainable solutions. Against this background, it is the motivation of Annex 80 to develop, assess, and communicate solutions of resilient cooling and overheating protection. Resilient Cooling is used to denote low energy and low carbon cooling solutions that strengthen the ability of individuals and our community as a whole to withstand, and also prevent, thermal and other impacts of changes in global and local climates. It encompasses the assessment and Research & Development of both active and passive cooling technologies of the following four groups: -Reduce externally induced heat gains to indoor environments; -Enhance personal comfort apart from cooling whole spaces; -Remove sensible heat from indoor environments; -Control latent heat (humidity) of indoor environments. The Annex 80’s main objective is to support a rapid transition to an environment where resilient low energy and low carbon cooling systems are the mainstream and preferred solutions for cooling and overheating issues in buildings.