Company Description

Bengt Dahlgren AB is a technology consulting company that was established 72 years ago. Today, we are present all over the country and are almost 700 community planning consultants who proudly bear our founder's name. Together, we have chosen to be really good at what makes properties live and people feel good. Heating, cooling, air-conditioning, energy, fire protection, sustainability, security, light, moisture and water are our world, and no one can do it better.

Thesis background:

Ceiling panel systems and chilled beams are versatile solutions for both cooling and heating in office and commercial buildings. These systems are known as water-based systems which provide heating and cooling to spaces primarily through water. These systems are recognized as an energy-efficient option for thermal conditioning the office spaces. When using for heating, they offer a cost-effective alternative by potentially eliminating the need for radiators, thereby reducing installation and investment costs.

While this approach offers economic benefits, the absence of radiators under windows can increase the risk of drafts. The formation and intensity of drafts are influenced by factors such as window U-values, indoor air temperature, ceiling panel surface temperature, and outdoor air temperature. Radiant temperature asymmetry is another potential source of thermal discomfort when using ceiling panels, which should be carefully considered in the design.

Thesis goal:

This project aims to investigate the key parameters that influence draught formation and thermal comfort when using ceiling panels and chilled beams for heating in offices and commercial buildings. Through the use of Computational Fluid Dynamics (CFD) simulations, the study will evaluate different scenarios to develop design recommendations that ensure effective heating performance and occupant comfort without the need for radiators.

The scopes of the work can include, but are not limited to the following:

• Performing experiments in the laboratory.
• Developing a CFD model of typical office zones with different variations of ceiling panels, chilled beams and other heating/cooling systems.
• Validating the model with experimental measurements.
• Exploring different scenarios using the simulation model.
• Providing suggestions for using ceiling panel systems and beams in office buildings for heating purposes

Qualifications

We are looking for a student/students to join our journey towards a sustainable future. The qualifications are:

• Education – applicants should be in the final phase of a master’s degree in mechanical, energy or civil Engineering or equivalent.
• Scope – The degree project is at master's level, corresponding to 30 higher education credits.

• The candidate should know or have enough motivation to quickly learn about buildings energy systems principles to conduct simulations and experiments.

• CFD simulation software, preferably Ansys
• Fluency in English is required, Swedish is a plus

Additional Information

• Start of assignment: 2025-01-06 or by agreement
• Location: Bengt Dahlgren AB, Göteborg
• Application – a combined document with your CV and grades are to be submitted in the application.
• Deadline for application is 2024-12-13. Applications are reviewed continiously and the position can be filled before the deadline, the ad will then be removed.
• Contact person and at Bengt Dahlgren is: Pernilla Obert-Nielsen, pernilla.obert-nielsen@bengtdahlgren.se , 0729652668