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Considerable efforts have been made to reduce the energy consumption of buildings due to the energy crisis, and, the Korean government has supported the use of renewable energy through various grants. Among the possible renewable energy sources, geothermal energy can be used regardless of the outside weather. Therefore, energy consumption can be reduced considerably in summer and winter. Despite the increasing use of renewable energy, the use of renewables has not been operating appropriately. Therefore, this study examined some of the problems of the operation of renewable energy and some possible improvements. The aim of the study is to evaluate a building containing an actual installed multi-geothermal heat pump (Multi-GHP) system, in terms of the energy efficiency. In addition, this study evaluated the present control system and the method of complex operation regarding existing heat sources systems and GHP systems through a simulation. The results can be regarded as the result of a hybrid operation method for the improvement of an existing operation. Therefore, the Multi-GHP system energy use of a hybrid operation condition of the Multi-GHP systems and the absorption (ABS) chiller-heater system was reduced compared to the operation condition of the Multi-GHP system, and the total energy consumption of the heat source equipment was reduced. The proposed operation plan was evaluated after applying the system to a building. These results showed that the efficient operation of a Multi-GHP hybrid operation method is possible. As a result, the GHP energy use of Multi-GHP systems and the ABS chiller-heater system was reduced by 30% compared to existing operation and the total energy consumption of heat source equipment was reduced by 78%.
Young-Ju Jung; Hyo-Jun Kim; Kyung-Ju Shin; Jae-Hun Jo; Yong-Shik Kim; Young-Hum Cho. Development of the Hybrid Operation Method of a Multi-Geothermal Heat Pump System and Absorption Chiller-Heater. Energies 2015, 8, 9320 -9343.
AMA StyleYoung-Ju Jung, Hyo-Jun Kim, Kyung-Ju Shin, Jae-Hun Jo, Yong-Shik Kim, Young-Hum Cho. Development of the Hybrid Operation Method of a Multi-Geothermal Heat Pump System and Absorption Chiller-Heater. Energies. 2015; 8 (9):9320-9343.
Chicago/Turabian StyleYoung-Ju Jung; Hyo-Jun Kim; Kyung-Ju Shin; Jae-Hun Jo; Yong-Shik Kim; Young-Hum Cho. 2015. "Development of the Hybrid Operation Method of a Multi-Geothermal Heat Pump System and Absorption Chiller-Heater." Energies 8, no. 9: 9320-9343.
The construction industry has made considerable energy-saving efforts in buildings, and studies of energy-savings are ongoing. Shading is used to control the solar radiation transferred through windows. Many studies have examined the position and type of shading in different countries, but few have investigated the effects of shading installation in Korea. In this study, the case of the shading installation according to the standard of Korea, and variations of the heating and cooling load in the unit area on the performance of the windows were examined. This study compared the variations of the heating and cooling load in the case of horizontal shading and the changing position of venetian blinds. This study confirmed that horizontal shading longer than the standard length in Korea saved a maximum of 13% energy consumption. This study confirmed the point of change of energy consumption by the Solar Heat Gain Coefficient (SHGC) variations. The exterior venetian blinds and those between glazing were unaffected by the SHGC. On the other hand, in the case of a south façade, the interior venetian blinds resulted in 24% higher energy consumption than the installation of horizontal shading in case of Window to Wall Ratio (WWR): 80%, U-value: 2.1 and SHGC: 0.4.
Seok-Hyun Kim; Kyung-Ju Shin; Bo-Eun Choi; Jae-Hun Jo; Soo Cho; Young-Hum Cho. A Study on the Variation of Heating and Cooling Load According to the Use of Horizontal Shading and Venetian Blinds in Office Buildings in Korea. Energies 2015, 8, 1487 -1504.
AMA StyleSeok-Hyun Kim, Kyung-Ju Shin, Bo-Eun Choi, Jae-Hun Jo, Soo Cho, Young-Hum Cho. A Study on the Variation of Heating and Cooling Load According to the Use of Horizontal Shading and Venetian Blinds in Office Buildings in Korea. Energies. 2015; 8 (2):1487-1504.
Chicago/Turabian StyleSeok-Hyun Kim; Kyung-Ju Shin; Bo-Eun Choi; Jae-Hun Jo; Soo Cho; Young-Hum Cho. 2015. "A Study on the Variation of Heating and Cooling Load According to the Use of Horizontal Shading and Venetian Blinds in Office Buildings in Korea." Energies 8, no. 2: 1487-1504.