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indoor climate

A Newly Designed Supply Diffuser for Industrial Premises

The results of this investigation revealed the airflow distribution from a new design of supply diffuser under non-isothermal conditions. To illustrate the indoor climate parameters in the occupied zone, for both the heating and cooling seasons, an experimental investigation was carried out in industrial premises. The indoor climate was explored at ankle, waist and neck levels for a standing person at different positions, to determine the variation of the thermal comfort indexes and draught rating (DR) with position in the facility.


In order to clarify determine the energy consumption and the indoor environment of an experimentalhouse with energy efficient design, measurements were taken since January 2006. The house isoccupied twice a year, for a week each in summer and winter. Simulation was used to predict theenergy consumption and indoor environment of the experimental house with a typical four-personfamily. The aim of this study is to understand the influence of energy efficient building design on energyconsumption and indoor environment.


Field measurements of the indoor climate have been carried out in 128 lightweight timber-framedetached houses in Finland and in Estonia during the years 2002-2005. The temperature and relativehumidity were continuously measured in bedrooms, living rooms and outdoors for each house at 1-hourintervals over a 1-year period.

Indoor Hygrothermal Loads in Estonian Dwellings

This paper analyzes the indoor hygrothermal loads measured in 27 detached houses and in 13apartments. A survey was conducted during the years 2003-2006 in Estonia. The temperature andrelative humidity (RH) were continuously measured in bedrooms, living rooms, and outdoors at onehour intervals. For the hygrothermal analysis, the determined design curve of the moisture excess forhouses with low occupancy on the higher 10 % critical level was +4 g/m3 during the cold period(Tout ? +5 C) and +1.5 g/m3 during the warm period (Tout ? +15 C).

Evaluation of Indoor Climates Using the ‘Climate Evaluation Chart’

The indoor climate plays a key-role in relation to sustainable building. Often measured or simulatedtime series are used for the evaluation of indoor climate performances. Analyzing these data might bea problem due to the lack of proper visualization tools. In this paper, we introduce a new way tovisualize long-term (seasonal) and detailed (less than 1 hour) measured or simulated indoor climatedata compared to demanded criteria in a single chart: the Climate Evaluation Chart (CEC).Furthermore, the use of CECs is demonstrated by two case studies: (1) Preservation priority.

Simulation of the Climate System Performance of a Museum in Case of Failure

The paper presents the evaluation of the current HVAC components and indoor climate of a high tech Naval Depot in case of failure events. The methodology of the research was: First, implementation of the heat, air & moisture models of the building and HVAC components in SimuLink. Second, validation of the models using measured data from the present building control system. Third, simulation of the current and new HVAC systems designs. Fourth, discussion of the usability of the approach.

Worker performance and ventilation in a call center : analyses of work performance data for registered nurses

This paper describes a study of the relationships between indoor environmental factors and individual work performance in a call center. The productivity benefits of ventilation rates appeared small, for the worker performance, only high temperature had a statistically significant negative impact on productivity. But it appears that the degree of understaffing and shift length have an impact on productivity too.

Survey and Analysis on Indoor Thermal Environment of the Marketplace

The object of this investigation is a marketplace in a cold winter and hot summer region. This survey provides some basic data for HAVC designing of marketplace and the improvement of existed HAVC system in cold winter and hot summer region, at the same time it is suggested:
1. Due to bad smell caused by fruit and vegetables, it is suitable for supermarket to adopt deterministic directional airflow.

Towards making the indoor climate visible in practice

This paper deals with how to visibly render the thermal climate in the design and presentationtools used by different participants in the building process. The focus is on those ventilation/coolingsystems where cool air is supplied directly into the occupied zone and therefore have a potential ofgenerating a volume close to the device with poor comfort. This volume could be described as a spreading bubble. In the paper a practical procedure for rendering the spreading bubble is presented. This is achieved in a number of steps.

Study on the Fluctuant Characteristics of Natural Wind in Built Environment

Natural ventilation is a more pleasant and acceptable ventilation mode, which is favorable to human physical and psychological comfort and health. In this research, experiments and analysis on the fluctuant characteristics of natural wind in outdoor environment and in different positions of indoor area are conducted. The authors analyze the physical structure of airflow fluctuations with turbulence statistical theory, chaos and fractal theory. The fluctuant characteristics of the natural wind in different built environment are found and generalized in the paper.