• 한국태양에너지학회 논문집
• /
• 제24권1호
• /
• pp.29-38
• /
• 2004

자동자 공조용 시스템에 사용되는 평행류형 응축기에 대하여 실제 운전조건에서 성능을 예측할 수 있는 모델링을 개발하였다. 모델링에 사용된 방법은 유효도-전달단위수법이고, 국소구간을 나누어 해석하는 국소구간법을 사용하였다. 모델링에 사용된 작동유체는 HFC134a이며, 응축기를 흐르면서 방생하는 냉매의 압력손실에 대한 물성변화를 포함시켜 보다 실제에 가깝게 해석하였다. 모델링에는 공기측과 냉매측의 열전달계수와 압력손실계수에 관한 상관식들을 포함하고 있다. 모델링의 결과는 실험값과 비교하여 비교적 잘 일치한다.

• 대한설비공학회:학술대회논문집
• /
• 대한설비공학회 2006년도 하계학술발표대회 논문집
• /
• pp.483-488
• /
• 2006

In this study, newly-developed slim electronic panel cooler with aluminum PF condenser and evaporator was tested and the results are compared with imported panel cooler with fin-tube heat exchangers. The PF heat exchangers significantly (approximately 45%) reduced the refrigerant charge. The air-side pressure drop was also reduced, which resulted in the reduction of the sound level of the panel cooler. The effect of the condenser size was also investigated.

• 설비공학논문집
• /
• 제10권2호
• /
• pp.202-216
• /
• 1998

A computer simulation for the performance analysis of automobile air conditioning components is carried out for the various operating conditions. The automobile air conditioning system consists of laminated type evaporator, swash plate type compressor, parallel flow type condenser, externally equalized thermostatic expansion valve and receiver drier. The overall heat transfer coefficient and the pressure drop in laminated type evaporator were obtained through experiments. In parallel flow type condenser, the performance analysis computer program using the empirical equation for heat transfer coefficient has been developed and the results are compared with experimental results. A model for matching the performance analysis programs of respective components .of automobile air conditioning system is introduced. Further, the effects of varying condenser size and refrigerant charge on the performance of automobile air conditioning system are discussed clearly.

• 한국공작기계학회논문집
• /
• 제13권4호
• /
• pp.100-105
• /
• 2004

Fin-tube type(Fin-type) heat exchanger has been tested in order to replace the heat exchanger of parallel flow type(P.F -type) which is now widly used in automobile air conditioning system The following conclusions are drawn by the comparison of the characteristics of the heat exchangers. Evaporator and condenser capacities and COP(Coefficience of performance) were varied as with the compressor speed, outdoor air temperature and air flow rate changed, which much influenced on the characteristics of the air conditioning system Evaporator and condenser capacities were increased with increasing compressor speed and outdoor air temperature. Evaporator and condenser pressures of Fin-type were decreased by 7% and 5% respectively compared with those of P.F-type. The COP of Fin-type was decreased with increasing outdoor air temperature and compressor speed. The COP of P.F-type was decreased by 14% compared with that of Fin-type.

• 대한기계학회:학술대회논문집
• /
• 대한기계학회 2000년도 춘계학술대회논문집B
• /
• pp.1-6
• /
• 2000

In this study, We evaluated the Performance of PFC and the system performance of large size air-conditioner applying to outdoor condenser. PFC can meet the same cooling capacity in 40.42% of volume to fin-tube condenser. Although the fin-tube condenser requires 3600g of refrigerant charging, PFC requires 1700g, 1800g, 1900g, 2000g refrigerant charging for each 2.0mm, 2.5mm, 3.0mm and 3.5mm fin pitches. Difference of condensing and evaporation pressure is the biggest point 2.0mm fin pitch and the smallest point 2.5mm fin pitch.