The paper describes three methods for determination of the fan energy consumption associated to air filter : the hourly method (calculation of the hourly fan power), the segment method (lifespan filter-associated fan energy), the BIN method (estimation of annual filter-associated fan energy). etailed filter installing date and detailed hourly AHU system simulation.
These methods allow in particular to estimate the filter-associated fan energy consumption and the life-cycle cost of filters.
The influence of wind velocity, jet width, jet angle and heat input on the efficiency of doorway air curtains in small air-conditioned spaces was investigated usical numerical simulation. Results show that proper design and installation of air curtain reduce air exchange between indoor and outdoor up to 90%. Optimum performance is obtained when the curtain air just reaches the floor. The corresponding critical air curtain velocity increases with external wind velocity normal to the doorway and with temperature difference between indoors and outdoors.
This document results from a Working Group set up by the World Health Organization. It reviews States current approaches to protect population from environmental tobacco smoke exposure. The meeting defined conditions for successful policies and recommended strategies for future action.
This report informs and advises governments, public health authorities, policy makers and sectors relevant to indoor air quality management on how to develop and strengthen IAQ policy in order to protect and promote health in the indoor environment. Strategies and possible action plan for policies related to public non-industrial buildings. The report also summarizes experience in European countries and in the USA.
Multiple-skin facades were studied by means of experiments and numerical simulations. Experimental work was done on naturally and mechanically ventilated single storey multiple skin facades. Field experiments showed that good design and excellent workmanship are of crucial importance to obtain the desired performance. The measurements enables an insight into the complex nature of the airflow in naturally ventilated cavities. Measurements on a controlled experimental set-up provided data to develop and validate a numerical model. This model was then implemented in an energy simulation tool.
This report describes the characteristics of a thermodynamic concept, exergy, in association with building heating and cooling systems. It introduces the various forms of exergy and the mathematical formulations used to evaluate them. It gives an example of exergy calculation for space heating systems.
This booklet summarizes the work of IEA ECBCS Annex 35 'Hybrid ventilation in new and retrofitted office buildings' and is based on the research findings from the participating countries. It describes the principles of hybrid ventilation technologies, control strategies and algorithms, as well as analysis method. The 13 case studies include both new-built and retrofitted designs. The booklet is accompanied by 21 technical reports and 13 case study reports from various authors.
Describes two European research projects on performance criteria for healthy buildings in which TNO Building and Construction Research (The Netherlands) is involved : HOPE (Health optimisation protocol for energy efficient buildings : Prenormative and socio-economic research to create healthy and energy efficient buildings) and PeBBu (Performance based building Thematic Network).
Ventilation, air conditioning and air heating systems are of vital importance for the health and comfort of residents and other building users. However, there exists a substantial body of literature that shows that HVAC systems performance can be greatly affected by inferior quality ductwork. To avoid these problems, it is important to pay greater attention to the design, construction, installation, and maintenance of ductwork systems, bearing in mind that the primary functions of the HVAC systems must be fulfilled.
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