This paper explains how to enhance the energy performance of a chiller plant designed with chillers ofequal size or unequal size and having superior coefficient of performance (COP) at part load operation.A simulation study was carried out on an air-cooled centrifugal chiller plant serving an office building.Four design options with respect to the number and nominal capacity of chillers were investigated(OP1: 6 x 1124kW; OP2: 8 x 810kW; OP3: 4 x 1213kW + 2 x 810kW; OP4: 2 x 1350kW + 2 x 1107kW +2 x 801kW).

In recent years, the aspect and behavior inside a bathroom and an appurtenant changing room havebeen changing. With these changes, the thermal insulation quality of a dwelling has improved, so itseems that the amount of moisture generated in a dwelling has changed. In this study, amount ofmoisture produced in a bathroom and a changing room was surveyed in order to grasp the thermal andhumid environment in bathroom and a changing room. From the result of the survey, it was found thatthe amount of moisture in bathing was bigger than before.

Motorized sun-controlled louvers and electrically heated glasses are installed in NIKKEN SEKKEITokyo Bldg. A lot of highly effective equipment systems are set up in this building. In this research,these energy conservation systems are measured and analyzed. This report explains the specificationof the building, equipments, and the window system. . As a result, it was confirmed that the exteriorblinds and a heat generating double glazing was effective in keeping thermal environment comfortableand saving energy.

The concentrations of ozone, particles (PM10 and PM2.5) and ultra-fine particles were measured duringdriving the automobile and during standing. Two ventilation modes were prepared; 1) all fresh air modeand 2) all re-circulation mode. The windows of the automobile had been always closed during thismeasurement. The indoor/outdoor ratio of the concentrations and the correlation among thosesubstances were reported. The concentrations of particles (PM10 and PM2.5) and ultra-fine particleswere dramatically had been increased while the automobile followed the trailer bus.

The results of a case study are presented focusing on efforts to conserve energy in an existing cityblock by physically connecting a number of existing buildings with pipes and cables and aCogeneration System (CGS), and then exchange energy among the buildings using the CGS andexisting heat source equipment. Essentially, the proposed system levels-out and reduces variation inthe combined inter-building energy load among the buildings with a variety of energy use profiles.

Study on existing indoor thermal environment is becoming more and more important for design of theindoor thermal environment and the application of energy-saving technology. In this work the fieldmeasurement of thermal environment in a complex atrium building was conducted and different effectson the indoor thermal environment were analyzed. The atrium is 14m in height. The first floor is forexhibition, and the cooling air can be supplied by air jets located on the upper position of the sidewall.The corridors on the second and third floors are not air conditioned.

Traditional method for measuring airborne microbes is based on two procedures called sampling andincubation. Sampling normally involves drawing a sampler from an air stream or room by means ofinstruments based on 3 types collecting-method, which named impaction, liquid impingement andfiltration. Incubation of agar plates typically requires several days.

This paper presents a numerical study of the coupled airflow and thermal environment in asemi-enclosed space surrounded by buildings. Our numerical simulation couples the heat transfercalculation and the computational fluid dynamic (CFD) airflow simulation in which a RNG(renormalization-group) k-? model is used. Both the solar radiation and building/ground thermal storagewere considered in the heat transfer part.

The purpose of this work is to combine negative air ions and mechanical filters to remove indoorsuspended particulates.

The large sample size test and statistic of thermophysical parameters of natural ventilated residentialbuildings in hot-summer and cold-winter area, including the indoor air temperature, relative humidity,and wind speed, was performed in this study. The basic situations of the occupant were investigated byquestionnaires. The thermal sensation subjective response of the occupant was investigated withASHRAE seven sensation scales.