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The chilled beam system is a popular energy saving system and it has been applied in Europe, the United States, and other countries for many years. There are two main types of chilled beams, such as the active chilled beam and passive chilled beam. The active chilled beam operates on the primary airflow, which induces airflow from the space through the cooling coil. This provides much more cooling capacity than a passive chilled beam working on a natural circulation flow. The efficient operation of the primary air unit is important to save the energy consumption from the fan and cooling capacity of the primary air unit. In this study, energy efficiency and efficient performance of the active beams with variable air volume (VAV) system was studied by simulation of the optimizing variable control parameters; the chilled beam efficiency difference was discussed considering the ratio between a primary air capacity and a chilled water capacity.

Abstract:In this study, by controlling the Electronic Expansion Valve opening, the influence of wet compression on a heat pump system was experimentally investigated in different heating conditions. The results demonstrate that the discharge temperature decreased and the mass flow rate increased, due to quality of the rising liquid droplets. It was also found that the heating capacity and power input of wet compression increased more than that of dry compression, with a superheat of 10 • C. The maximum COP (Coefficient of Performance) exists at a specific quality of ca. 0.94 to 0.90, as the power input in the region of wet compression is proportionally larger than the increase in the heating capacity, according to the decreasing quality. When the Entering Water Temperature of the Outdoor Heat Exchanger was 10 • C, 5 • C, and 0 • C, the COP increased by a maximum of ca. 12.4%, 10.6%, and 10.2%, respectively, in comparison to the superheat of 10 • C. In addition, the superheat at the discharge line is proposed as a proper controlling parameter to adjust the quality at the suction line, by varying the opening of the expansion valve during wet compression.

The purpose of this study was to examine the Compare the effects of inspiratory muscle strengthening training and expiratory muscle strengthening training of normal adult respiratory function. Method : In this study, we want to compare the effect of inspiratory muscle strengthening training(n=8) and expiratory muscle strengthening training(n=8) to target the normal adult 16 people. expiratory muscle strengthening training, was 25 minutes of training on the basis of the breathing image program that has been pre-recorded. inspiratory muscle strengthening training, use the power-breathe plus on the measured resistance value, was carried out for 25 minutes. Using the spirometer in order to examine the ability to breathe, FVC, FEV1, FEV1 / FVC, MVV was measured. Result :The results showd that in the breath muscle strengthening training FVC, FEV1, MVV increased statistically significantly. The inspiration muscle strength training FVC, FEV1, MVV was a statistically significant increase, FEV1/FVC decreased. There was no statistically significant difference between. Conclusion :In conclusion, both methods give the result of increasing the effective respiratory function. Inspiratory muscle strengthening training, the function of the lung is very limited to be used when and by us effectively and expiratory muscle strengthening training to increase the capacity of the lung is an effective way that will increase the volume.