Feasibility of CFD technique applied to evaluation of thermal and air environment of residential rooms with floor heating systems

In that study, a method to predict conditions in floor heating type living room by CFD is proposed. Full size model experiments were carried out to obtain measured data. Then simulation based on CFD aimed at reproducing the experimental conditions. Case studies based on CFD were then performed . For each condition a possible cold draft risk was evaluated .

Numerical simulation of thermal behavior and human thermal comfort in the tombs of the valley of kings

A CFD simulation software to investigate the human thermal comfort in ventilated tombs of the Valley of Kings was used for that study. Its main objective is to assess the airflow characteristics, thermal pattern and indoor air quality in the different tomb ventilation configurations to know the basic flow characteristics. A full description of the parametric case studies is presented in this paper.

Heat recovery in residential ventilation systems from an exergy perspective

Basic steady-state energy and exergy analyses for residential ventilation with and without heat recovery from ventilation air are presented in this paper. Factors influencing residential ventilation from an exergy perspective are discussed and dimensionless numbers are proposed to express the energy savings potential of a DC fan and a heat recovery unit (HRU) in dwelling ventilation system.The results of that study show that ventilation with heat recovery reduces the heat demand in terms of energy and exergy.

Mathematical model and annual energy consumption simulation of a three-rotary wheels fresh air handling unit

A mathematical model is built to evaluate the energy saving potential of a new three rotary wheels fresh air handling unit (TRWFAHU). The energy saving potential of the proposed AHU is numerically analyzed and compared with conventional fresh air handling unit . The TRWFAHU can increase fresh air rate by 10 % without increasing energy consumption.

Optimal indoor climate in an energy conscious manner

The new headquarters for Danish broadcasting company are planned for low energy use and minimization of CO2 emissions. Alternative energy sources are high priorities to achieve a healthy building with a pleasant indoor climate in terms of light, acoustics, thermal conditions and air quality. The combination of natural cooling and groundwater cooling with seasonal underground cold storage will save an estjmated 75 % of energy.

Thermal comfort and energy saving optimization for HVAC systems with night ventilation cooling

Night ventilation is a passive cooling technique that can reduce the cooling loads and energy requirements. In this paper , the use of a Multi Objective Genetic Algorithm optimization (MOGA) performed on a climatized part of a building with night ventilation proved to be a helpful tool for the analysis of problems where conflicting objectives have to be optimized simultaneously..

Evaluation of IAQ in residential kitchens based on laboratory and field studies

Field studies have been carried out in an existing kitchen to investigate the effects of gas stoves on indoor environment. Laboratory measurements were carried out according a similar process : Determination of filtration, Emission rate measuring, Determination of pollution loads, Thermal comfort measurements, Evaluation of local exhaust system. Results and conclusions are presented

A study on the mitigation technique for indoor chemical pollution by circulating ventilation system with air purifying devices.

A ventilation system effective to solve the SBS problems has been developed : it consists in a circulating ventilation system with air cleaning units that reduce indoor contaminant concentration without increasing the amount of air supply. The aim of that study is to determine the formaldehyde and VOC removal rates of that ventilation system. A constant-emission test in environmental chambers has been used for the experiments.

Experimental measurements IAQ and ventilation of spanish office buildings

Photoacoustic spectroscopy (PAS) and the tracer gas techniques were used for the testing of indoor air quality and ventilation in nine Spanish office buildings during a 15 day period in May. Those experimental results have been analysed and conclusions are presented in this paper.

Lessosn learned from product testing, source evaluation and air sampling from a five-building sustainable office complex

This paper points out the benefits of on-going testing of building materials. This allow to learn more about the decay or rise of building-related and occupant-related indoor air chemicals. Results, discussion and lessons learned from those product testing, source evaluation and air sampling are presented.

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