Alternative Strategies for Theatres in Central European Climate: The potential of passive design strategies to lower the operational energy requirement for existing theatres in Berlin

This paper investigates the potential of passively lowering the operational energy requirement of performance buildings in the Central European Climate. The energy consumption of this typology is largely caused by mechanical ventilation to cool and ventilate the theatre during shows, necessary for the thermal comfort and ventilation requirements...

Thermal Cycling in Converter IGBT Modules with Different Cooling Systems in Pitch- and Active Stall-Controlled Tidal Turbines

This paper compares active and passive cooling systems in tidal turbine power electronic converters. The comparison is based on the lifetime of the IGBT (insulated gate bipolar transistor) power modules, calculated from the accumulated fatigue due to thermal cycling. The lifetime analysis accounts for the influence of site conditions, namely...

Adaptation of the built environment to changing urban microclimates: A residential high-rise case study

Temperatures are increasing all around the world due to climate change and are predicted to continue to rise in the future. This rise in temperature is worrying especially for urban areas around the world that already suffer from increased temperature due to the urban heat island effect. In order to adapt to these changes buildings often get...

Revitalizing Philipsburg: Towards a sustainable, densified, and vibrant neighbourhood.

In 2017 the island Sint Maarten was hit by hurricane Irma. Approximately ninety-one per cent of the build environment was damaged. This made the existing housing shortage, caused by a growing population, even more significant. Now, three years later, the residential area of Philipsburg is mostly deserted. With the departure of its residents, the...

Effect of Element Number Reduction on Inter-User Interference and Chip Temperatures in Passively-Cooled Integrated Antenna Arrays for 5G

The impact of reducing the total number of elements in passively-cooled, chip-integrated and space-tapered 5G base station antenna arrays on inter-beam interferences and chip temperatures is investigated for multi-user spacedivision-multiple-access applications. A convex element position optimization algorithm is used to synthesize the array...

Lifetime Analysis of IGBT Power Modules in Passively Cooled Tidal Turbine Converters

Thermal cycling is one of the major reasons for failure in power electronic converters. For submerged tidal turbine converters investigating this failure mode is critical in improving the reliability, and minimizing the cost of energy from tidal turbines. This paper considers a submerged tidal turbine converter which is passively cooled by...

De Frituurfabriek: Circular Phase Change Material (PCM) for social architecture in Bospolder - Tussendijken (BoTu) & Merwe-Vierhavens (M4H), Rotterdam

To provide the current population of Bospolder - Tussendijken with a future perspective that tackles socio-demographic issues, they create Phase Change Material (PCM) Modules of waste products Frying oil and Mg2+ in the cooperative factory: 'Frituurfabriek' in the M4H. They have the opportunity to participate in society, to become owner of a...

Daytime radiative cooling: A new passive cooling method for dwellings in the Mediterranean island of Cyprus

Daytime radiative cooling (DRC) is a very novel passive cooling method for buildings that utilises the recent technological advance in wavelength selective-emittance material research and takes advantage of a transparency window that exists in the atmosphere between 8 and 13 μm. Application of DRC in locations where warm weather prevails for...

Heat Transfer Enhancement in Passively Cooled 5G Base Station Antennas Using Thick Ground Planes

The thermal and electromagnetic effects of varying the ground plane thickness and aperture size of the 5G integrated base station antennas are investigated. A double-sided PCB structure is designed with antennas and digital beamforming chips on the opposite sides. Fully-passive cooling is achieved by using fanless CPU coolers attached to the...

Passive Cooling of mm-Wave Active Integrated 5G Base Station Antennas Using CPU Heatsinks

The challenge of cooling in mm-wave chipintegrated base station antenna arrays is addressed. Several approaches in thermal modeling of electronics are revisited and discussed. The two-resistor compact thermal model is applied to predict the junction temperatures of the beamformer chips. Thermal simulations are performed for two fabricated arrays...

Multiple Beam Synthesis of Passively Cooled 5G Planar Arrays Using Convex Optimization

An extended-feature, system-driven convex algorithm for the synthesis of uniform-amplitude, irregular planar phased arrays with simultaneous multi-beam optimization for mm-wave 5G base station applications in multi-user scenarios is presented. The inter-user interferences are suppressed by minimizing the maximum sidelobe level (SLL) for a...

Thermal-Aware Synthesis of 5G Base Station Antenna Arrays: An Overview and a Sparsity-Based Approach

Heat removal capabilities and radiation performances of several sparse antenna array topologies are studied for cooling enhancement in 5G millimeter-wave base station antennas. Both electromagnetic and thermal aspects are jointly considered for the first time in array layout optimization and a novel connection between layout sparsity and thermal...

25 Years of cooling research in office buildings: Review for the integration of cooling strategies into the building façade (1990–2014)

This paper seeks to present a panorama of cooling related research in office buildings, categorising reported research experiences from the past 25 years in order to identify knowledge gaps and define current paths and trends for further exploration. The general goal behind this research is to support the design of sustainable office...

Simulating natural ventilation in large sports buildings: Prediction of temperature and airflow patterns in the early design stages

In large sport’s buildings, a big part of energy can be saved by providing natural instead of mechanical ventilation. However, additional challenges arise while controlling airflow and temperatures in different zones. These measures<br/>highly depend on the shape, construction and ventilation openings, which are mostly decided in the early...