The author had participated IEAIECBCS Annexprojects since 1987, starting from Annex 16 forBEMS, ending at Annex 40 for Commissioning.I used to recognize how this line of continualset-up of subjects to optimize HVAC design andmaintenance through system simulation, BEMSmeasurements, fault detection and diagnosis andbuilding optimization technologies, which ledthe way to building commissioning, had beenwell designed just as by god's hand.

A radiant heating applied to floor, so called'Ondol', is a traditional heating method in Koreaand has been widely used. The form of theOndol has been modified so that it can beapplied to modem residential buildings.However, the Ondol system has limitation inkeeping comfortable indoor-environment,because the Ondol is able to control floortemperature only.

Conventional air-conditioning control in a roomassumes perfect diffusion of temperature in theroom, and relies on a temperature sensorinstalled on the wall or ceiling of the room, or inthe return duct. Air-conditioning is controlled sothat the sensor temperature becomes equal tothe sensor-set temperature ("set temperature").In reality, however, since thermal stratificationoccurs in a room, the set temperature is oftennot attained in an occupied zone that should beproperly air-conditioned. This may result inexcessive cooling.

In the desiccant dehumidifier using adsorbentsuch as silica gel and zeolite, outdoor moist airis dehumidified in adsorbent. On the otherhands, it is necessary for the adsorbent whichbecomes moist by dehumidifying outdoor air tobe dried (regenerated).

Recently, supplying glass space like atrium isbeing extended widely for introducing naturallight into a building, improving rest roomfunctions and having a pleasant workenvironment. However, some problems canoccur in atrium such as overheating andexcessive vertical temperature difference duringthe summer time, making people feel unpleasantand increase air conditioning load.This study targets that the air conditioning loadaccording to characteristics of the atrium'svarious windows can be expected throughbuilding energy performance evaluationanalysis.

This paper describes the merit of daylighting bycomparing the physical and psychologicalaspects of light and heat radiation. We preparedthree rooms: direct lighting with fluorescentlamps; indirect lighting with incandescentlamps; and daylighting alone. We conductedphysical measure-ment associated with light andheat, together with subjective experiments interms of luminous and thermal sensations.The measurement was done in August, 2006,and also in December, 2007. In summer, the airtemperature of the room with daylighting alonewas lower than two other rooms with electriclighting.

This paper discusses the possibility of asimple solar hot water pre-heating system fordomestic hot water supply. In Japan, the fossilfuel use for hot water supply amounts to about30% of the total in residential buildings. The useof conventional solar hot water heaters has beendecreased draniatically over the last 30 years,although the extensive use should have beenexpected. They are regarded to be notnecessarily cheap and moreover theirappearance has not been preferred by quite afew building designers.

A roof is one of the most importantcharacteristics of Thai architecture especiallyin a house, traditionally. Also, the roof is apart of the house that mainly effects energysaving due to heat allowance pass through andrelease from indoor space. The study, basedon model experiments, targets to find out theeffects of roof forms on indoor air temperature.The purpose is to give information for roofform types selection in Thai Houses. Models,lxlxl meter boxes, are used for theexperiments by changing their roof forms forcomparison.

This study aims to derive design data of thesupply chilled water temperature and water flowrate for the radiant floor cooling system inKorean residential buildings. At first,prEN- 1264 standard and ASHRAE method forthe radiant floor cooling system design werereviewed. Secondly, to verify application of thestandard, moclc-up tests were performed. Theresults show that prEN-1264 method isappropriate in case supply chilled watertemperature is low.

This paper discusses whether there is thermalcognition acquired through daily experience inthe built environment during summer seasons.For this purpose, we analysed the results of asubjective experiment to reveal the relationshipbetween subjective responses andenvironniental quantities obtained from twoexperimental small wooden buildings: one has aradiative cooling system on the ceiling and theother has a conventional convective coolingsystem.