carbon-dioxide

A demonstration house was previously built and commissioned in Iqaluit, Nunavut, Canada. The purpose of the overall effort is to evaluate the performance of a high-performance building located in the Canadian Arctic, while considering the unique social, economic and logistical challenges associated with its remote location. Previous work consisted of monitoring and reporting on the energy consumption due to heating between April 2016 and April 2017.

Describes the CO2-controlled ventilation system of the energy efficient EKONO II office building in Helsinki. An air sample is taken from a main return air duct, pumped to a CO2 analyzer which gives the message of the concentration tothe computer. The computer regulates the opening of the recirculation air and outdoor air dampers to keep the CO2 concentration in return air below a certain level. Shows fluctuation of outdoor air rate and CO2 concentration during one day.

Examines CO2-controlled ventilation for a variety of buildings. A theoretical study shows that the modification of the ventilation rate which can be obtained by the control of a 2 speed fan or by variation chimney cross-section enables the ventilation rate to be independent of external conditions (wind, temperature) and to produce annual energy savings of the order of 1500-2000 KWhr for a 100m2 house.

Describes an energy efficient hypermarket built in South Wales. Describes energy conserving features, including CO2-controlled ventilation using an infra-red analyser. Briefly discusses problems of installing and calibrating the system.

Describes a simple device developed in the Institute for Applied Physics which is suitable for frrsh air control in air conditioned spaces. The protype instrument detects the amount of CO2 in the atmosphere on the basis of photoacoustics. Illustrates the device schematically and explains its operation.

Evaluates the intensity and acceptance of body odour as perceived by 89 male and female judges entering 2 auditoria occupied by 50-200 men. Performs 200 experiments with varied ventilation rate, space volume per occupant and temperature. Finds carbon dioxide to be a useful index of body odour intensity. Does not find any significant influence of space volume per occupant on steady-state ventilation requirements. Establishes a relationship between percentage dissatisfied and CO2 concentration.

Treats pilot study where the ventilation was controlled by the carbon dioxide content in the indoor air.

Notes the large savings possible if ventilation were adapted to the prevailing need. A promising possibility for indicating occupancy and thus the ventilation requirement is measuring the level of carbon dioxide. The project includes a test with equipment for CO2-monitoring of the exhaust air flow in an office building which controls the volume of outdoor air supply, thusmaintaining the CO2 level constant. Measures how the CO2 level can vary locally,how other pollutants in air can vary, how much energy can be saved.

89 male and female judges have evaluated the intensity and acceptance of body odour when they enter 2 experimental auditoria occupied by 41-216 men. More than 1000 men served as occupants during 200 experiments. Varies ventilation rate, space volume per occupant, and temperature. Finds carbon-dioxide to be a useful index of body odour intensity. Finds no significant influence of space volume per occupant on odour intensity or steady-state ventilation requirement. Establishes a relation between the percentage of dissatisfied and CO2 concentrations.