SINTEF search

As dominant synthetic refrigerants are increasingly regulated, natural refrigerants have been resurrected as working fluids. Like all other sectors, the cruise industry must adapt to reduce GHG emissions. More emphasis has been given to natural working fluids, such as water, ammonia...

This study was carried out to investigate the performance of a transcritical CO₂ heat pump chiller that provides heating and cooling simultaneously. There are several applications where such CO₂ systems are implemented, i.e., hotels, commercial kitchens, fishing vessels, etc. Depending on the type...

Hotels in India conventionally use diesel-fired hot water generators to meet hot water demands at 46°C. These are inefficient and also release high emissions. This study focuses on the energy saving and emission reduction potentials of a CO₂ heat pump chiller system for such an application. An...

The implementation of CO₂ as a refrigerant is considered one of the solutions to improve the overall building’s energy performance, especially if the heat recovery concept is applied. In this paper, an innovative approach to compensate for the thermal losses of the in-series stratified thermal...

The article investigates numerically the performance of a CO₂ heat pump chiller unit integrated with an ejector to provide for the cooling and Domestic Hot Water (DHW) demands of a hotel in India. The system is complete with five in-series stratified heating thermal energy storage tanks and a...

Reefer transportation has become an integral part of supply chain management for the shipment of temperature-sensitive goods. In a country as large and geographically diverse as India, refrigerated road transport is crucial for the safe circulation of fresh and frozen perishables. The need for...

Interest in low-temperature refrigeration (at temperatures below -50 °C) has grown in recent years, especially due to the COVID-19 pandemic. Consequently, this high demand is exerting stress on the electrical grid. Generally, latent heat storage in phase change materials (PCMs) can be used to...

In this paper, the cooling and heating performance of a parallel compression CO₂ refrigeration system with a cooling capacity of 240 kW is analysed for milk pasteurization application. The system chills the milk to 4 ˚C and the recovered heat partially supports the pasteurization process or is...

When surface waves interact with ambient turbulence, the two affect each other mutually. Turbulent eddies get redirected, intensified and periodically stretched and compressed, while the waves suffer directional scattering. We study these mutual interactions experimentally in the water channel...

In this work we present a unique set of coincident and collocated high-resolution observations of surface currents and directional properties of surface waves collected from an airborne instrument, the Modular Aerial Sensing System, collected off the coast of Southern California. High-resolution...

This paper presents an approach for controlling ofshore hybrid power systems consisting of gas turbines, offshore wind, and batteries for satisfying an exogenous power demand. A hierarchical controller is developed comprising a high-level economic nonlinear model predictive controller that...