Göran Hultmark
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View article: Evaluation of Elastic Filament Velocimetry (EFV) Sensor in Ventilation Systems: An Experimental Study
Evaluation of Elastic Filament Velocimetry (EFV) Sensor in Ventilation Systems: An Experimental Study Open
Determination of airflow rates is an inevitable part of the energy-efficient control of ventilation systems. To achieve efficient control, the flowmeters used must be suitably accurate and create minimum disturbance to the airflow. In this…
View article: Precision Ventilation for an Open-Plan Office: A Study of Variable Jet Interaction between Two Active Chilled Beams
Precision Ventilation for an Open-Plan Office: A Study of Variable Jet Interaction between Two Active Chilled Beams Open
Precision ventilation is developed to achieve thermal comfort for occupants in an office by creating micro-climate zones. The present study aims to achieve individual thermal comfort for occupants with different metabolic rates by using hi…
View article: Precision Ventilation in an Open-Plan Office: A New Application of Active Chilled Beam (ACB) with a JetCone Feature
Precision Ventilation in an Open-Plan Office: A New Application of Active Chilled Beam (ACB) with a JetCone Feature Open
Mixing ventilation systems effectively improves thermal comfort in open-spaces due to adequate turbulent mixing of the cold stream with ambient air. This study introduces the concept of precision ventilation for achieving local thermal com…
View article: Performance evaluation of active chilled beam systems for office buildings – A literature review
Performance evaluation of active chilled beam systems for office buildings – A literature review Open
The applications of Active Chilled Beam (ACB) technology have increased over the two decades and received a lot of attention in research publications due to its ability to provide a suitable indoor climate for building occupants with minim…
View article: Ventilation System Design and the Coronavirus (COVID-19)
Ventilation System Design and the Coronavirus (COVID-19) Open
Most new office buildings in Nordic countries are equipped with balanced mechanical ventilation systems. The purpose of ventilation in office buildings is to provide thermal control by supplying cold or warm air for adequate indoor air qua…
View article: Thermal Analysis of Organic and Nanoencapsulated Electrospun Phase Change Materials
Thermal Analysis of Organic and Nanoencapsulated Electrospun Phase Change Materials Open
Latent heat stored in phase change materials (PCM) can greatly improve energy efficiency in indoor heating/cooling applications. This study presents the materials and methods for the formation and characterization of a PCM layer for a late…
View article: Investigation of Thermal Behavior of Paraffins, Fatty Acids, Salt Hydrates and Renewable Based Oils as PCM
Investigation of Thermal Behavior of Paraffins, Fatty Acids, Salt Hydrates and Renewable Based Oils as PCM Open
Latent heat thermal energy storage (LHTES) using phase change materials (PCM) is a renewable energy source that is applicable for implementation in space cooling due to its high energy storage density. A novel thermal energy storage which …
View article: Full-scale operation of a novel two-pipe active beam system for simultaneous heating and cooling of office buildings
Full-scale operation of a novel two-pipe active beam system for simultaneous heating and cooling of office buildings Open
This paper presents an investigation on the operation of a novel active beam system installed in an office building located in Jönköping, Sweden. The system consists of two parts: a dedicated outdoor air system (DOAS) to satisfy latent loa…
View article: A PCM based cooling system for office buildings: a state of the art review
A PCM based cooling system for office buildings: a state of the art review Open
Cooling of air in buildings has a significant effect on thermal comfort and, consequently, productivity of office occupants. This study presents a state of the art review of energy efficient cooling systems that will provide occupants in b…
View article: Operation of a novel two-pipe active beam system in an office building: a thermal comfort study
Operation of a novel two-pipe active beam system in an office building: a thermal comfort study Open
This paper presents an investigation regarding a thermal comfort study carried out in an office building located in Jönköping, Sweden. The particularity is that, in authors’ knowledge, this is the first building equipped with a novel activ…
View article: Modeling of a Novel Low-Exergy System for Office Buildings with Modelica
Modeling of a Novel Low-Exergy System for Office Buildings with Modelica Open
This paper aims to investigate the thermal behavior of a novel low-exergy system for office buildings. The main characteristic of the system is its ability to provide simultaneous heating and cooling by operating one water circuit. Inlet w…
View article: Development of a new controller for simultaneous heating and cooling of office buildings
Development of a new controller for simultaneous heating and cooling of office buildings Open
This paper aims to develop a new controller to regulate the supply water temperature of a room-temperature loop integrated in a novel HVAC for office buildings. The main feature of the room-temperature loop is its ability to provide simult…