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Articles 151 - 180 of 254
Full-Text Articles in Engineering Physics
On The Hygrothermal Behaviour Of Brick Veneer Cladded Timber Frame Walls: The Role Of The Vapour Diffusion Resistance Of The Wind Barrier, Michiel Vanpachtenbeke, Jelle Langmans, Jan Van Den Bulcke, Joris Van Acker, Staf Roels
On The Hygrothermal Behaviour Of Brick Veneer Cladded Timber Frame Walls: The Role Of The Vapour Diffusion Resistance Of The Wind Barrier, Michiel Vanpachtenbeke, Jelle Langmans, Jan Van Den Bulcke, Joris Van Acker, Staf Roels
International Building Physics Conference 2018
The present study looks into the hygrothermal behaviour of timber frame walls with brick veneer cladding in a moderate sea climate. It specifically focuses on the contradictory criterion for the wind barrier when it comes to the risk of interstitial condensation for summer and winter conditions: a vapour open wind barrier is advantageous during an outward vapour flow (i.e. in typical winter conditions for European climates), while during an inward vapour flow (i.e. in summer conditions) a more vapour tight wind barrier is appropriate. Therefore, a field study is conducted on two typical timber frame walls with brick veneer cladding …
Performance Evaluation Of A Highly Insulated Wall To Withstand Mould, Klodian Gradeci, Umberto Berardi
Performance Evaluation Of A Highly Insulated Wall To Withstand Mould, Klodian Gradeci, Umberto Berardi
International Building Physics Conference 2018
In this paper, the performance to withstand mould growth of a highly insulated wall is evaluated by applying a probabilistic-based methodology that accounts for the involved uncertainties and investigates their significance. A sensitivity analysis according to the Morris method is conducted to understand the influence of each parameter and simplify the system representation. Deficiencies in terms of moisture and air leakages are accounted for. The mould growth outcome is evaluated by integrating different mould models and assessment criteria. The study demonstrates that a probabilistic-based methodology enables a more systematic approach to evaluate wall constructions since it accounts for the involved …
Renovation With Internal Insulation And Heat Recovery In Real Life– Energy Savings And Risk Of Mold Growth, Martin Morelli, Eva B. Møller
Renovation With Internal Insulation And Heat Recovery In Real Life– Energy Savings And Risk Of Mold Growth, Martin Morelli, Eva B. Møller
International Building Physics Conference 2018
This paper presents a pilot project for renovation of a large residential area; focus is on energy consumption and risk of mold growth. The renovation included internal insulation of walls with capillary active insulation material, balanced mechanical ventilation with heat recovery and insulation of floor towards basement. These types of measures are not completely new and have been used in other buildings as well, however the measures may be either risky regarding mold growth or the effect is uncertain with the specific external wall composition. A pilot project including six apartments was performed to test the measures in these specific …
Thermal Insulation Of Radon Systems To Avoid Freezing, Mehdi Ghobadi, Liang Zhou
Thermal Insulation Of Radon Systems To Avoid Freezing, Mehdi Ghobadi, Liang Zhou
International Building Physics Conference 2018
Radon (Rn) stacks, with or without an inline Rn fan, are designed to extract damp soil gas from under basement concrete slabs of homes. Along with Rn gas, moisture vapor also travels up through the Rn stacks. The amount of moisture in the vent pipes can, depending on the circumstances, be significant. In extremely cold weather, this moisture can condense, freeze, form ice and clog the vent pipe at the exit point. In this study, COMSOL Multiphysics was used to examine the amount of insulation required to avoid ice build-up in the Rn vent pipe located in unheated attic space …
Hygrothermal Performance Of Sealed Attics In Climate Zone 3a, Mikael Salonvaara, Achilles Karagiozis, William Miller
Hygrothermal Performance Of Sealed Attics In Climate Zone 3a, Mikael Salonvaara, Achilles Karagiozis, William Miller
International Building Physics Conference 2018
Sealed attics with fiberglass have been in the US building codes for several codes cycles. Prior to the IRC 2018, air permeable insulation (such as fiberglass) was previously allowed to be deployed without continuous air impermeable insulation only in dry climate zones 2B and 3B in tile roofs systems. New research has revealed that asphalt shingles can also be allowed as implemented in the new IRC 2018 with a new addition to the section for sealed attics using air permeable insulations. The new building code also permits the use of air permeable insulation without air impermeable insulation in climate zones …
Bioclimatic Tools For Sustainable Design – Uncertainty Perspective, Krystyna Pietrzyk
Bioclimatic Tools For Sustainable Design – Uncertainty Perspective, Krystyna Pietrzyk
International Building Physics Conference 2018
Overall, holistic approach in which the building is integrated into its environment with respect to building physics principles allows for discussion of a variety of passive strategies regarding the building placement (local climatic conditions, microclimate etc.), building types, building materials and technical systems. Bioclimatic design is referred to as a proper approach to highlight the connection of a building with the natural environment, which can be treated as the prerequisite for energy efficient design. The research results within the reliability studies of building performance become an inspiration for architects and engineers to further discuss tools supporting decisions at the early …
Optimal Control Strategies For Passive Heating And Cooling Elements Reduce Loads By Two-Thirds In The Adaptive Reuse Of A San Francisco Bay Area Office, Alexandra Rempel, Serena Lim
Optimal Control Strategies For Passive Heating And Cooling Elements Reduce Loads By Two-Thirds In The Adaptive Reuse Of A San Francisco Bay Area Office, Alexandra Rempel, Serena Lim
International Building Physics Conference 2018
Housing crises in urban centers and growing climate concerns are encouraging city planners and building owners to explore the conversion of commercial buildings into energy-efcient dwellings. Passive solar heating, shading, and natural ventilation are attractive in such adaptive reuse projects since they minimize operational energy, but they sufer from the perception of limited efectiveness, and passive heating is ofen disregarded entirely in cloudy climates. At the same time, passive heating has recently shown promise in the cloudy winters of western Oregon and upstate New York, allowing the San Francisco Bay area to provide an excellent opportunity for further exploration. Passive …
New Algorithm For Water Leakages Flow Through Rain Screen Deficiencies, Lars Olsson, Carl-Eric Hagentoft
New Algorithm For Water Leakages Flow Through Rain Screen Deficiencies, Lars Olsson, Carl-Eric Hagentoft
International Building Physics Conference 2018
There is a need of more knowledge about the mechanisms of water leakage through façades exposed to driving rain to make reliable risk analyses. Therefore, we have studied it in more detail and the outcome include inter alia a new algorithm. The algorithm is developed for calculation of water leakages through rain screen deficiencies. The algorithm is based on empirical values from many measurements according to standardized test method and validation. Even though the leakage process is very complicated, simple correlations have been shown. The leakages flow rate through deficiencies are mainly limited by the runoff rate and the catch …
Stochastic Modelling Of Hygrothermal Performance Of Highly Insulated Wood Framed Walls, Lin Wang, Hua Ge
Stochastic Modelling Of Hygrothermal Performance Of Highly Insulated Wood Framed Walls, Lin Wang, Hua Ge
International Building Physics Conference 2018
Recent years, the majority of building codes in North America require an energy efficient envelope to improve the building energy efficiency. There are different design strategies to achieve a higher insulation level of the wood framed building envelope, such as increasing the depth of stud cavity to accommodate thicker insulation or adding an exterior insulation while keeping the depth of stud cavity unchanged. However, the highly insulated walls may lead to a higher risk of moisture problems. The deep cavity walls will reduce the temperature of the wood sheathing, which may increase the potential for condensation and mold growth. The …
Experimental Analysis On A Solar Air Heating Façade System, Valeria Longo, Francesco Isaia, Stefano Fantucci, Lorenza Bianco, Valentina Serra, Ruut Hannele Peuhkuri
Experimental Analysis On A Solar Air Heating Façade System, Valeria Longo, Francesco Isaia, Stefano Fantucci, Lorenza Bianco, Valentina Serra, Ruut Hannele Peuhkuri
International Building Physics Conference 2018
In this study, investigations on the thermal performance of a solar air heating façade system were carried out. The system consists of a double skin building envelope composed by an opaque internal face, with a novel solar absorbent layer and a glazed external face. This kind of system, particularly suitable to refurbish existing building envelopes, is designed to work as a fan-assisted air supply, which mitigates the heating and ventilation demand during the winter period. An experimental campaign was set up using a full scale façade module in order to thoroughly characterize its thermal behavior and the air flow rate. …
Hygrothermal Assessment Of North Facing, Cold Attic Spaces Under The Eaves With Varying Single Sided Passive Ventilation Strategies And Infiltration Scenarios, In A Cool, Temperate Climate, Nickolaj Feldt Jensen, Søren Peter Bjarløv, Christopher Just Johnston, Casper F. H. Pold, Morten Hjorslev Hansen, Ruut Hannele Peuhkuri
Hygrothermal Assessment Of North Facing, Cold Attic Spaces Under The Eaves With Varying Single Sided Passive Ventilation Strategies And Infiltration Scenarios, In A Cool, Temperate Climate, Nickolaj Feldt Jensen, Søren Peter Bjarløv, Christopher Just Johnston, Casper F. H. Pold, Morten Hjorslev Hansen, Ruut Hannele Peuhkuri
International Building Physics Conference 2018
Relative humidity and temperature were measured in cold attic spaces under the eaves with diffusion-open roofing underlay to investigate different ventilation strategies, the influence of infiltration, and exterior insulated roofing underlay. The project was carried out as a full-scale experimental setup in the cool, temperate climate in Lyngby, Denmark. The objective was to test if the best practice recommendations concerning design of the cold attic space will prevent damaging moisture levels in the attics. Measurements do however indicate that complying with recommendations will not ensure satisfactory moisture levels in the attic spaces. A comparison of the passive ventilation strategies in …
Application Of Radiant Floor Heating In Large Space Buildings With Significant Cold Air Infiltration Through Door Openings, Gang Liu, Siyu Cheng, Yi Xu, Kuixing Liu
Application Of Radiant Floor Heating In Large Space Buildings With Significant Cold Air Infiltration Through Door Openings, Gang Liu, Siyu Cheng, Yi Xu, Kuixing Liu
International Building Physics Conference 2018
Radiant Floor Heating System (RFHS) has been commonly used in railway stations in cold regions of China for its advantages in thermal comfort and energy efficiency. However, the uneven distribution and extremely cold area of the heating floor, caused by cold air infiltration through door openings, are commonly found in our filed measurements. This impact is not considered in the standardized design methods, resulting in an underestimation of the design heat flux. In this paper, CFD simulations are used to quantify the impacts of natural infiltration on surface heat transfer process. Model validation was made against field measurements. 13 simulations …
Evaluating The Hygrothermal Performance Of Wooden Beam Heads In 19th Century Town Houses Using In-Situ Measurements, Paul Wegerer, Thomas Bednar
Evaluating The Hygrothermal Performance Of Wooden Beam Heads In 19th Century Town Houses Using In-Situ Measurements, Paul Wegerer, Thomas Bednar
International Building Physics Conference 2018
Improving the energy efficiency of typical 19th century townhouses in middle Europe the focus on the wooden beam bearing’s hygrothermal performance has become more and more important during the last years. There are several issues for the risk of rotting of the wooden parts of the ceiling, because the retrofitting process of the masonry totally changes the hygrothermal conditions inside the wall. Applying an interior insulation or changing the airtightness of the building envelope as well as the introduced moisture from the retrofitting process lead to a moisture increase inside the masonry and might cause rotting of the ceilings’ wooden …
Sensing And Information Technologies For The Environment (Site); Hardware And Software Innovations In Mobile Sensing Technologies, Munitxa Maider, Elie Bou-Zeid, Biayna Bogosian, Abdulghafar Al Tair, David Radcliff, Scott Fisher, Youngryel Ryu
Sensing And Information Technologies For The Environment (Site); Hardware And Software Innovations In Mobile Sensing Technologies, Munitxa Maider, Elie Bou-Zeid, Biayna Bogosian, Abdulghafar Al Tair, David Radcliff, Scott Fisher, Youngryel Ryu
International Building Physics Conference 2018
This research focuses on the development and integration of low-cost Mobile Urban Sensing Technologies (MUST) and immersive environmental data exploration mechanisms with the ambition to inform citizens about their environments and aid scientists in uncovering the relations between the surface attributes and the urban environment. We propose to use 3D immersive environmental visualization techniques to enable a user-centered interactive analysis and rationalization of the available urban environmental data in relation to further urban attributes. With this ambition, we have developed three mobile apps that explore three strategies of Augmented Reality (AR) 3D visualizations of urban environmental data. While some data …
Benchmarking The Energy Efficiency Of Office Buildings In Belo Horizonte, Brazil, Ana Carolina De Oliveira Veloso, Roberta Vieira Gonçalves De Souza
Benchmarking The Energy Efficiency Of Office Buildings In Belo Horizonte, Brazil, Ana Carolina De Oliveira Veloso, Roberta Vieira Gonçalves De Souza
International Building Physics Conference 2018
In countries in which energy efficiency regulations are already consolidated or in the process of being consolidated, an important parameter to be verified is the relative consumption of electric energy of existing buildings in accordance with established ranges of consumption for different types of buildings. In the present paper ISO 52003-1 methodology was applied to create a benchmarking for office buildings for the city of Belo Horizonte, Brazil and the work discusses the implications of using the standard’s methodology for the Brazilian scenario. To fulfill this objective, it was necessary to gather electric energy consumption data for this type of …
Exploring Occupants' Impact At Different Spatial Scales, Sara Gilani, William O'Brien, Burak H. Gunay
Exploring Occupants' Impact At Different Spatial Scales, Sara Gilani, William O'Brien, Burak H. Gunay
International Building Physics Conference 2018
Buildings' users have widely been accepted as a source of uncertainty in building energy performance predictions. However, it is not evident that the diversity of occupants' presence and behavior at the building level is as important as at the room level. The questions are: How should occupants be modeled at different spatial scales? At the various scales of interest, how much difference does it make if: (1) industry standard assumptions or a dynamic occupant modeling approach is used in a simulation-based analysis, and (2) probabilistic or deterministic models are used for the dynamic modeling of occupants? This paper explores the …
Towards A New Way Of Capturing Occupant Well-Being, Mark Allen, Mauro Overend
Towards A New Way Of Capturing Occupant Well-Being, Mark Allen, Mauro Overend
International Building Physics Conference 2018
Occupant well-being is undergoing a surge of interest in both the research community and industry, as the potential benefits of increased levels of well-being become better quantified and understood. Well-being science itself is also constantly evolving, moving from the traditional negative view of depression and mental disorders as markers of well-being, towards the more positive notion of flourishing, which is feeling good and functioning well. This paper first sets out the key elements of well-being, as found in psychology literature. Surveys and interviews are the main methods used to capture the well-being of individuals and populations, yet completion rates can …
Thermal Performance Of An Electric-Driven Smart Window: Experiments In A Full-Scale Test Room And Simulation Model, Giovanni Ciampi, Antonio Rosato, Sergio Sibilio, Giuseppe Peter Vanoli, Manuela Almeida, Luigi Maffei
Thermal Performance Of An Electric-Driven Smart Window: Experiments In A Full-Scale Test Room And Simulation Model, Giovanni Ciampi, Antonio Rosato, Sergio Sibilio, Giuseppe Peter Vanoli, Manuela Almeida, Luigi Maffei
International Building Physics Conference 2018
This paper reports the results of experimental tests and numerical simulations aimed at evaluating the performance of an electric-driven smart window with respect to solar control in buildings. The experimental performances of the electric-driven smart window were evaluated using a south oriented full scale experimental facility designed and realized. The tests were carried out during the summer under real sky conditions upon varying the state of the electricdriven smart window (clear and milky). In the first part of the paper, the experimental results are discussed in terms of surface temperature of glazings as well as indoor air temperature in order …
Assessment Of Cumulative Damage Of Selected Building Envelopes Exposed To Various Environmental Effects, Václav Kočí, Jiří Maděra, Robert Černý
Assessment Of Cumulative Damage Of Selected Building Envelopes Exposed To Various Environmental Effects, Václav Kočí, Jiří Maděra, Robert Černý
International Building Physics Conference 2018
Hygrothermal performance of building envelopes based on three different building materials (solid brick, high performance concrete, aerated autoclaved concrete) is assessed under climatic conditions of Prague and Atlantic City. Main objective of the paper is to evaluate the influence of cumulative damage, which was induced by means of natural weathering in 2012- 2015 period, on the long-term performance. The performance is assessed using various measures, namely time-of-wetness function, number of freeze/thaw cycles, and annual amount of energy transmitted through the envelope. The results show that thermal performance of the envelopes gets mostly better after weathering as the annual amount of …
Impact Of The Substrate Thermal Inertia On The Thermal Behaviour Of An Extensive Vegetative Roof In A Semiarid Climate, Sergio Vera, Gilles Flamant, Germán Molina, Camilo Pinto, Paulo Tabares-Velasco, Nicholas Kincaid, Waldo Bustamante
Impact Of The Substrate Thermal Inertia On The Thermal Behaviour Of An Extensive Vegetative Roof In A Semiarid Climate, Sergio Vera, Gilles Flamant, Germán Molina, Camilo Pinto, Paulo Tabares-Velasco, Nicholas Kincaid, Waldo Bustamante
International Building Physics Conference 2018
The aim of this paper is to evaluate the impact of thermal inertia of the substrate of a vegetative roof on its thermal behaviour. Thermal inertia of the substrate was incorporated in two existing thermal models of vegetative (green) roof systems, the Sailor (2008) and Tabares and Srebric (2012) models. The predicted temperatures across the substrate, with and without inertia, were compared with experimental data obtained on a real vegetated roof located in a semiarid climate. The study shows the absolute need to consider the thermal inertia of the substrate to accurately predict the temperatures within the substrate and thus …
Neural Network Models Using Thermal Sensations And Occupants’ Behavior For Predicting Thermal Comfort, Zhipeng Deng, Qingyan Chen
Neural Network Models Using Thermal Sensations And Occupants’ Behavior For Predicting Thermal Comfort, Zhipeng Deng, Qingyan Chen
International Building Physics Conference 2018
It is important to create comfortable indoor environments for building occupants. This study developed neural network (NN) models for predicting thermal comfort in indoor environments by using thermal sensations and occupants’ behavior. The models were trained by data on air temperature, relative humidity, clothing insulation, metabolic rate, thermal sensations, and occupants’ behavior collected in ten offices. The models were able to predict similar acceptable air temperature ranges in offices, from 20.6℃ to 25℃ in winter and from 20.6℃ to 25.6℃ in summer. The comfort zone obtained by the NN model using thermal sensations in the ten offices was narrower than …
Quantification Of Building Energy Performance Uncertainty Associated With Building Occupants And Operators, Sara Gilani, William O'Brien
Quantification Of Building Energy Performance Uncertainty Associated With Building Occupants And Operators, Sara Gilani, William O'Brien
International Building Physics Conference 2018
Occupants play an important role in building energy performance, while building operators are the other side of the coin. This research quantifies the relative impact of probabilistic versus standard occupant models on building energy use. Energy performance of a highperformance reference small office building in Ottawa, Canada, is investigated using a simulation-based analysis. The impact of building users is studied by systematically altering occupant and operator-related domains, including occupants' presence and use of lights, window shades, operable windows, plug-in appliances, and thermostats. The results showed that the predicted natural gas energy use increased by a factor of about two compared …
Daylight Availability In A Room Equipped With Pcm Window, Dominika Knera, Dariusz Heim
Daylight Availability In A Room Equipped With Pcm Window, Dominika Knera, Dariusz Heim
International Building Physics Conference 2018
The increase in building energy performance mainly focused on the improvement of physical properties (thermal and optical) of individual components of building envelope. Very good isolation parameters can be easily achieved for opaque elements like walls and roofs. However, improvement of glazed component parameters is still required. Improving thermophysical properties of window can be achieved using phase change material (PCM). Presented work is a part of extensive research project including the analysis and experimental investigation of window integrated with PCM layer. This modification changes the thermal properties of glass unit and effects on visible light transmission through the window. The …
Experimental Investigations Of Wooden Beam Ends In Masonry With Internal Insulation: Results Contrasting Three Years Of The Experiment, Pavel Kopecký, Kamil Staněk, Michal Bureš, Jan Richter, Jan Tywoniak
Experimental Investigations Of Wooden Beam Ends In Masonry With Internal Insulation: Results Contrasting Three Years Of The Experiment, Pavel Kopecký, Kamil Staněk, Michal Bureš, Jan Richter, Jan Tywoniak
International Building Physics Conference 2018
This paper deals with hygro-thermal performance of wooden beam ends embedded in masonry walls with lime-cement plaster applied on the external side. Three different insulation systems are attached on the internal side of masonry. The real scale experiment has been monitored for three consecutive years. Microclimatic conditions in joist pockets were assessed by VTT mold growth index. The paper shows the influence of two changes of boundary conditions on the microclimate in joist pockets. First, moisture load on the internal side of building enclosure was increased (24 °C, 60 % in winter 2016/2017 instead 20 °C, 50 % in winter …
Experimental Validation Of A Model For Naturally Ventilated Double-Skin Facades, Alessandro Dama, Matteo Dopudi, Olena Kalyanova Larsen
Experimental Validation Of A Model For Naturally Ventilated Double-Skin Facades, Alessandro Dama, Matteo Dopudi, Olena Kalyanova Larsen
International Building Physics Conference 2018
The steady state thermal model discussed in this paper is devoted to predict the temperatures and heat fluxes through a naturally ventilated DSF, having solar radiation and environmental temperatures as inputs. It is coupled with a fluid-dynamic model, based on a pressure loop, which takes into account both buoyancy and wind pressure at the openings. The model has been validated against experimental data, basing on the prediction of the internal surface temperature of the DSF. Results show acceptable accuracy in the prediction of the heat flux towards the inside, even though they reveal a slight heat flux overestimation associated with …
Pv-Pcm System Integrated Into A Double Skin Façade. A Genetic Optimization Based Study For The Pcm Type Selection, Hagar Elarga, Andrea Dal Monte, Francesco Goia, Ernesto Benini
Pv-Pcm System Integrated Into A Double Skin Façade. A Genetic Optimization Based Study For The Pcm Type Selection, Hagar Elarga, Andrea Dal Monte, Francesco Goia, Ernesto Benini
International Building Physics Conference 2018
This paper reports the results of a genetic optimisation based numerical analysis of a PV-PCM system integrated into a double skin façade. The aim of the research activity was to develop and test the performance of a proposed simulation approach to identify the optimal configuration of the PCM layer, in terms of temperature transition range, and thickness, to assure the best energy performance of the façade system. Furthermore, because of the intimate relationship between the PCM’s features and the ventilated cavity to define the performance of the façade system, the domain of exploration included as variable the airflow rate and …
Campus As A Lab For Computer Vision-Based Heat Mapping Drones: A Case Study For Multiple Building Envelope Inspection Using Unmanned Aerial Systems (Uas), Tarek Rakha, Amanda Liberty, Alice Gorodetsky, Burak Kakillioglu, Senem Velipasalar
Campus As A Lab For Computer Vision-Based Heat Mapping Drones: A Case Study For Multiple Building Envelope Inspection Using Unmanned Aerial Systems (Uas), Tarek Rakha, Amanda Liberty, Alice Gorodetsky, Burak Kakillioglu, Senem Velipasalar
International Building Physics Conference 2018
Unmanned Aerial Systems (UAS – a.k.a. drones) have evolved over the past decade as both advanced military technology and off-the-shelf consumer devices. There is a gradual shift towards public use of drones, which presents opportunities for effective remote procedures that can disrupt a variety of design disciplines. In architecture praxis, UAS equipment with remote sensing gear presents an opportunity for analysis and inspection of existing building stocks, where architects, engineers, building energy auditors as well as owners can document building performance, visualize heat transfer using infrared imaging and create digital models using 3D photogrammetry. Comprehensive energy audits are essential to …
A Deep Reinforcement Learning Method For Model-Based Optimal Control Of Hvac Systems, Zhiang Zhang, Chenlu Zhang, Khee Poh Lam
A Deep Reinforcement Learning Method For Model-Based Optimal Control Of Hvac Systems, Zhiang Zhang, Chenlu Zhang, Khee Poh Lam
International Building Physics Conference 2018
Model-based optimal control (MOC) methods have strong potential to improve the energy efficiency of heating, ventilation and air conditioning (HVAC) system. However, most existing MOC methods require a low-order building model, which significantly limits the practicability of such methods. This study develops a novel model-based optimal control method for HVAC supervisory-level control based on the recently-proposed deep reinforcement learning (DRL) framework. The control method can directly use whole building energy model, a widely used flexible building modelling method, as the model and train an optimal control policy using DRL. By integrating deep learning models, the proposed control method can directly …
Air Cooling And Dehumidification With A Zeolite Coated Heat Exchanger Regenerated By Solar Thermal Energy, Vincenzo Gentile, Marco Simonetti, Fabio Restagno
Air Cooling And Dehumidification With A Zeolite Coated Heat Exchanger Regenerated By Solar Thermal Energy, Vincenzo Gentile, Marco Simonetti, Fabio Restagno
International Building Physics Conference 2018
This paper presents some experimental results of a new device for low energy/low exergy air conditioning system. The device can realize both dehumidification and sensible cooling of external air, and it is designed for very low pressure drops, drastically reducing the electricity consumption for the driving fans. It is composed by a finned coil heat exchanger, coated with a SAPO-34 zeolite layer, that handles both heat and mass transfer in a single component. During the adsorption a cold water flow at 20 °C circulates through the coil, cooling the air and realizing in a single step a complete air-treatment. Hot …
Periodic Alternation Between Intake And Exhaust Of Air In Dynamic Insulation, Masaru Abuku, Akira Fukushima, Tsukasa Tsukidate, Sayaka Murata, Akinori Hosoi, Hideo Ichiboji, Daisuke Kitagawa, Kanako Makita
Periodic Alternation Between Intake And Exhaust Of Air In Dynamic Insulation, Masaru Abuku, Akira Fukushima, Tsukasa Tsukidate, Sayaka Murata, Akinori Hosoi, Hideo Ichiboji, Daisuke Kitagawa, Kanako Makita
International Building Physics Conference 2018
Dynamic insulation (DI) can recover heat lost in conduction by drawing cold outdoor air into indoor through an insulation wall in winter. A “breathing DI” system we proposed in the past has functions both as an insulated envelope and as a highly efficient heat exchanger for ventilation. It is alternated periodically that the outdoor air is drawn through half of walls made of breathable inorganic concrete (BIC) and the indoor air is exhausted through the other half of the BIC walls. In order to put the breathing DI system into practice in housing construction, this paper presents some studies from …