Model-Based Comparative Evaluation of Building and District Control-Oriented Energy Retrofit Scenarios

Tommasi, Luciano De; Ridouane, Hassan; Giannakis, Georgios B.; Katsigarakis, Kyriakos; Lilis, Georgios; Rovas, Dimitrios

doi:10.3390/buildings8070091

Cited by 20 publications

(16 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The proposed system assumes the purchase of fans by the museum and the configuration of the correct control algorithm basing on instantaneous T and RH measurements. We did not consider specific HVAC devices or their efficiency, which may be the subject of future research, especially since some recent studies [54] showed considerable variations in energy consumption depending on the HVAC efficiency.…”

Section: Discussionmentioning

confidence: 99%

Proposed Strategies for Improving Poor Hygrothermal Conditions in Museum Exhibition Rooms and Their Impact on Energy Demand

Ferdyn-Grygierek

Grygierek

2019

Energies

View full text Add to dashboard Cite

In museums, poor microclimate conditions, especially large changes in relative humidity and temperature, can lead to serious deterioration of the exhibits. Properly designed heating, ventilation, and air conditioning (HVAC) systems for precise control of the air parameters are required. However, due to the financial restrictions of museums, complex air-conditioning systems are often not feasible. In this study, we tested and propose novel methods to reduce the short- and long-term fluctuations in the relative humidity in exhibition rooms of a Polish museum. The methods only include indoor temperature and ventilation airflow control strategies, without the use of (de)humidification equipment. The analysis is based on simulations using EnergyPlus software. A multi-zone thermal model of the museum building was validated and calibrated with measured data. A full calendar year was simulated for five control cases (including the current method used) and two internal heat gain schedules. The energy demand for heating and cooling for each case was calculated. The combination of temperature control and adequate ventilation using ambient airflow allows for dramatic improvement in the microclimate conditions. The proportion of the year when the instantaneous indoor relative humidity is ±5% from set point decreased from 85% to 20%. A significant effect was obtained over the summer months.

show abstract

Section: Discussionmentioning

confidence: 99%

Proposed Strategies for Improving Poor Hygrothermal Conditions in Museum Exhibition Rooms and Their Impact on Energy Demand

Ferdyn-Grygierek

Grygierek

2019

Energies

View full text Add to dashboard Cite

show abstract

“…The Wi-Fi-based occupancy schedule decreased energy consumption of the HVAC system by at least 50%. Much broader research has been conducted under the OptEEmAl project funded by the EU Horizon 2020 program to improve the energy efficiency of entire residential districts [46]. As part of the project, new districts will be designed, and the existing districts will be retrofitted by combining passive (upgrading the building envelope through the installation of internal and external insulation) and active measures (installation of new HVACs, replacement of outdated units), using renewables and implementing control strategies to guarantee their energy efficiency.…”

Section: Mechanical Ventilationmentioning

confidence: 99%

The Applicability of Coanda Effect Hysteresis for Designing Unsteady Ventilation Systems

Skotnicka-Siepsiak

2020

Energies

View full text Add to dashboard Cite

Energy-saving ventilation systems are designed to improve the energy efficiency of buildings. Low energy efficiency in buildings poses a considerable problem that needs to be addressed. Mechanical ventilation with heat recovery has gained increased popularity in recent years. Mechanical ventilation has numerous advantages, including easy adjustment and control, high indoor air quality and elimination of indoor pollutants. Mixing ventilation is the most popular type of mechanical ventilation, in particular in residential buildings. Unsteady ventilation is a type of mixing ventilation that involves stronger mixing effects and smaller vertical temperature gradients to improve indoor air quality (IAQ) and minimize energy consumption. This study examines the possibility of controlling and modifying Coanda effect hysteresis (CEH) to generate unsteady flow and simulate the conditions of unsteady mixing ventilation. The experiment was performed on a self-designed test bench at the University of Warmia and Mazury in Olsztyn. It demonstrated that an auxiliary nozzle can be applied at the diffuser outlet to control CEH and the angles at which the air jet becomes attached to and separated from the flat plate positioned directly behind the nozzle. The study proposes an innovative mixing ventilation system that relies on CEH. The potential of the discussed concept has not been recognized or deployed in practice to date. This is the first study to confirm that an auxiliary nozzle by the diffuser outlet can be operated in both injection and suction mode to control CEH. In the future, the results can be used to design a new type of nozzles for unsteady ventilation systems that are based on CEH control.

show abstract

“…The calculation of these DPIs is done through a set of simulation tools that have been integrated into OptEEmAL in order to calculate the indicators and then to post-process and aggregate them to compute the DPIs. In total, there are four tools that enable these calculations: Energy Plus [19] (to compute the energy demand related indicators); a tool specifically developed for OptEEmAL called the HVAC tool [20] (to compute the energy consumption related indicators); the NEST tool [21] (to compute the environmental indicators); and the Economic and Social Indicators' Calculation Tool [22], developed to compute the indicators in these two fields. All these tools together form the Simulation toolbox of OptEEmAL, which uses as input data the information stored within the DDM and provide as outcome the DPIs computed and post-processed.…”

Section: The Opteemal Toolmentioning

confidence: 99%

Integration of Prioritisation Criteria in the Design of Energy Efficient Retrofitting Projects at District Scale: A Case Study

García-Fuentes¹,

Álvarez²,

Serna³

et al. 2019

Sustainability

View full text Add to dashboard Cite

The evident need for improving the existing building stock still suffers from important barriers, such as the fragmentation of the value chain, the lack of information regarding some solutions, and the lack of confidence with respect to energy savings, which prevent unlocking investments, and the difficult communication among stakeholders. Therefore, new processes based on exploiting the potential of existing and new tools are required. In this framework, the OptEEmAL project has developed a tool that integrates stakeholders, data and tools in order to ease the process of designing energy efficient retrofitting projects at building and district scale. This tool works around an optimisation framework in order to evaluate, compare and optimise candidate retrofitting scenarios against a set of indicators showing the performance of the district. This evaluation and optimisation method is based on aggregating indicators through transforming the priorities of stakeholders into a mathematical weighting scheme, which makes it possible to provide scenarios within their expectations. Therefore, the generation of these scenarios is driven by their design parameters, being thus flexible and adapted to their needs. This paper shows the implementation of this tool and specifically 3 different prioritisation schemes, analysing how they impact into the decision making process and selection of the retrofitting strategy.Buildings account for approximately 40% of energy consumption and 36% of GHG emissions in the context of the EU [1]. When analysing the stock of existing buildings, around 30% of the building stock is more than 50 years old [2] and almost 75% is energy inefficient [3,4]. The implications of this energy inefficiency not only result in an energy and environmental cost, but also provoke other impacts, such as health problems due to the low levels of comfort within these buildings [5]. It is then imperative to focus on upgrading an ageing building stock, whose current renovation rates are low, at~1.2%. To achieve these targets, this rate should increase to 3% [6].On the other hand, the retrofitting market is quite fragmented, with multiple stakeholders with different and often conflicting interests. This is mirrored in the communication and information exchanges between them. This strong barrier is added to others, such as the lack of knowledge of some technologies among construction professionals, the varying ambition of performance requirements present within regulations, lack of awareness, and uncertainty as to the expected savings, which make

show abstract

Model-Based Comparative Evaluation of Building and District Control-Oriented Energy Retrofit Scenarios

Cited by 20 publications

References 38 publications

Proposed Strategies for Improving Poor Hygrothermal Conditions in Museum Exhibition Rooms and Their Impact on Energy Demand

Proposed Strategies for Improving Poor Hygrothermal Conditions in Museum Exhibition Rooms and Their Impact on Energy Demand

The Applicability of Coanda Effect Hysteresis for Designing Unsteady Ventilation Systems

Integration of Prioritisation Criteria in the Design of Energy Efficient Retrofitting Projects at District Scale: A Case Study

Contact Info

Product

Resources

About