In Korea, there is growing interest in the remodeling of aged apartment buildings. Traditionally, theheating panel in Korea is a wet type floor heating panel that utilizes radiation. But if a wet type floorheating panel is installed in an aged apartment during its remodeling, some problems may occur. Theyinclude failure to secure enough ceiling height, to reduce level of floor impact noise and possibility thatthe load on the existing structure is increased.
The objective of this paper is to apply a novel decoupling control method, direct feedback linear (DFL),to VAV air-conditioning system, which is differences from local linear decoupling control method. Amodel of VAV air-condition room is developed by a typical air conditioning system. Using DFL control,decoupling control is realized among multi-control loops in VAV air conditioning system and a linearmulti-inputmulti-output model is obtained. According to the VAV air conditioning model the real-timeDFL control system is designed and simulated based on MATLAB/SIMLINK.
In this study, we evaluated the effectiveness of sorptive building materials in reducing VOCsconcentrations in air using a small test chamber. Air containing a low concentration of VOCs wassupplied and any decrease in the VOCs concentrations was measured at the exhaust. Five differenttypes of building materials were investigated; activated carbon, gypsum board mixed with a givenquantity of activated carbon, board made out of activated carbon, humidity-controlling porous ceramicmaterial and ordinary gypsum board.
Heat transfer between soil and cooling water in buried pipes is presented, thus ground source heatpump can realize the transfer from low-grade energy to high-grade energy. We tested Watertemperature and flow rate of the buried pipe of Ground source heat pump system under intermittentoperation condition in Qingdao, temperature field of vertical buried double-U pipes is analyzed bythree-dimensional numerical model.
This study explored the reduction effect of indoor pollutants by the kinds of plant. The effect of reducingthe concentration of air contaminants by three species of plants was studied in a full-scale mock-upmodel. Aglaonema brevispathum, Pachira aquatica and Ficus benjamiana were used. Their positionsand amount were controlled. Field measurements were performed in models where the plants wereplaced and were not. The dimensions of the two models were equal.
In an indirect evaporative cooling (IEC) installation the extracted air is cooled by means of adiabatichumidification. By passing over an air/air heat exchanger this air cools down the supply air. A clearinteraction can be observed between the relative humidity of the extracted air and the thermal comfortrealized in the building.
A Simulation Program for Regional Energy and Environment Management (SPREEM) has beendeveloped for management throughout the life cycle from planning and design to operation of awide-area energy and environment whose core is DHC (district heating and cooling). Highoperability and easy understanding are required in SPREEM because its target users includedesigners and operations managers.SPREEM was developed as a simulation tool that executes calculation in Excel, and offers the highaccuracy required for management.
The purpose of studying vernacular Japanese architecture is to understand to what extent a house withlarge opening surfaces, no thermal insulation and very low environmental impact can become avaluable shelter during cold winters and hot humid summers. The reason of this result is to be found inthe strict relationship between the socio-cultural context and the environmental characteristics of thebuilding. The occupants behavior, the way of dressing, relaxing, living inside the house is acomplement of the thermal, daylight and solar performances of the envelope.
Social, financial, energy and technical data from about 1110 households have been collected during2004 in the major Athens area. The sample has been divided in seven income groups and a detailedanalysis has been performed. Important conclusions have been drawn regarding the quality ofhouseholds, the operational conditions and the energy spent per income group. Low income people aremore likely to be living in old buildings with poor envelope conditions. The cost per person and unit areais much higher for the low income group for both heating and electricity.
The traditional house of Japan, Kominka, is constructed of wooden pillars and beams, and clay walls.The indoor space in the Kominka remains cool in summer because overhanging eaves block solarradiation and the open frame airs out. Technology to make small cracks airtight is undeveloped.Consequently, drafts enter the indoor space and chill occupants during winter. Improvements of indoorclimate have not been realized. This report describes "Yukis house," which is a Kominka built in thelatter 1700s, defined as a residence of the privileged class.
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