Heat Recovery in the Drying Process of Milk Powder by Using a Liquid Sorption System

The last step in the production of milk powder is drying, a very energy intensive process that demands 30% to 40% of the total energy input of a typical plant. It takes place in Spray Dryers (SD), where concentrated milk is sprayed and placed in direct contact with hot and dry air that cools down and gains humidity as water is evaporated from...

System modeling of supercritical water gasification processes: Thermo-fluid one-dimensional modeling in Modelica language

Supercritical water gasi?cation (SCWG) is a conversion process for wet biomass feedstock into synthetic natural gas at conditions above the critical point of water (220.9 bar and 374.15 °C). A high energy and conversion ef?ciency of the process is achieved by using supercritical water as a reaction medium which avoids the necessity of an energy...

C3 - A Cloud Controlled Climator for the van Gendthallen Amsterdam

The industrial heritage the 'van Gendthallen' in Amsterdam are repurposed into a cultural convention center. To accomplish this while conserving the qualities of its monumental façade, a data center is introduced inside the halls to provide the space with a sustainable waste heat source and climate system. The interaction between the data center...

Natural and decentralised ventilation and climate concepts: A proposal for a new hybrid concept

This report tries to answer the question: Can a hybrid system, combining the good air quality and low costs of a natural system with the useradjustability, energy efficiency and small size of a decentralised mechanical system, offers a feasable, sustainable alternative to current ventilation concepts? In an attempt to do so, the Climat Cavity...

Heat modeling of wastewater in sewer networks: Determination of thermal energy content from sewage with modeling tools

This text presents an approach to assess the energy content (flow and temperature) at any point of the sewer system based on the coupling of a stochastic model to predict drinking water demand from households and a model to estimate the temperature distribution in the sewer network. An application example is given where the developed tool is...

Heat recovery with hybrid ventilation in office buildings

This master thesis examines the possibilities of creating a decentralized hybrid ventilation system with a heat recovery system. Natural ventilation is more commonly used as the main ventilation principle and has the advantage to lower the energy costs of a building. One of the downsides of the natural ventilation system is the lack of heat...

Working Fluid Design for Organic Rankine Cycle (ORC) Systems

The Organic Rankine Cycle is an energy conversion cycle similar to the conventional Rankine cycle which runs on a working fluid other than water. The selection of a working fluid is a critical part of designing an Organic Rankine Cycle (ORC) system. The number of fluid types actually used in commercial ORC power plants do not justify the number...

Performance of Counter Flow Heat Recovery Ventilation Systems in Dwellings Considering the Influence of Uncertainties

Both critical and optimistic claims have been made regarding the performance of heat recovery ventilation systems (HRVS) in dwellings. Such arguments are raised partly because two key aspects are not fully clarified, i.e. the performance criteria and the influence of uncertainties. In the current paper, an assessment method for HRVS considering...