http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Saha, Bidyut B.,Alam, K.C. Amanul,Koyama, Shigeru,Lee, Jong Boong 한국공작기계학회 2002 한국공작기계학회 춘계학술대회논문집 Vol.2002 No.-
A conventional silica gel/water adsorption chiller has been analyzed numerically. A novel non-dimensional mathematical model has been presented to analyze the design effect of different components of an adsorption chiller. The design parameters of this system are characterized by the number of transfer unit, NTU, of different components and the inert material alpha number, a of different components of the systems. Results show that condenser NTU_(a) has the most influential effect on the system performance, which is followed by adsorber NTU_(e). It is also seen that coefficient of performance (COP) and non-dimensional specific cooling capacity increases with the increase of NTU_(a) and NTU_(e), but decreases with the increase of inert material alpha number. A therm-economic data of the adsorption chiller and some other heat pump systems those are in practical operation are also presented.
Improvement of COP with Heat Recovery Scheme for Solar Adsorption Cooling System
K. M. Ariful Kabir,Rifat A. Rouf,M. M. A. Sarker,K. C. Amanul Alam,Bidyut B. Saha 대한설비공학회 2018 International Journal Of Air-Conditioning and Refr Vol.26 No.2
Heat recovery ensures optimum usage of the collected energy, and thus, minimizes heat loss for a solar adsorption chiller. Two-bed adsorption chiller with conventional single stage, run by direct solar coupling with heat recovery, has been studied mathematically. In a heat recovery adsorption refrigeration system, to facilitate heat transfer, heat transfer fluid is distributed between two adsorbers maintaining the same mass flow rate. There is no mass transfer between system components during this phase. It is a semi-continuous system performed between two adsorption beds. After completion of desorption/condensation mode, heat transfer fluid is allowed to circulate between the heated desorber and the cooled adsorber. This process distributes some heat of the desorption bed to the adsorber preparing it for the next preheating mode where heat transfer between them is done adiabatically. Consequently, the performance has been checked and a satisfactory increase in the Coefficient of Performance (COP) (approximately 15%) has been detected in the calculated results for the heat recovery operation. It is also observed that the heat recovery process enhances the working hour and overall performances of the solar heat driven adsorption chiller.