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태양열에 의한 냉방 및 난방시스템의 성능향상(I) - TRNSYS에 의한 동직열부하 계산과 태양열 시스템의 최적화 -
강용태,김효경,노승탁,Kang, Y.T.,Kim, H.K.,Ro, S.T. 대한설비공학회 1988 설비저널 Vol.17 No.6
This study simulates a typical solar system using the transient simulation program TRNSYS, and calculates the maximum cooling load of the model room of $50m^2$. In this study, energy rate control method is used in calculating a maximum cooling load. On the ground of the maximum cooling load of the model room, the variables that have an effect on the solar collection performance of the solar system are made a selection. Also in this study the trend of the solar collection performance is shown as the variables change. The results show that the variables which have an effect on the collection performance are collector area, collector mass flow rate, collector slope and the volume of storage tank, and the optimal value of Ac/Vt is not constant but varies as the collector area and the collector mass flow rate. Also the results show that for cooling system the optimal value of the collector slope is latitude minus $15^{\circ}$ during the seasonal operations, and twenty percent of the maximum cooling load is saved with the aid of the solar energy.
폭기생물막(曝氣生物膜) 여과지(濾過池)의 여과저항(濾過抵抗)에 관한 연구(?究)
강용태,현길수,Kang, Yong Tae,Hyun, Kil Soo 대한토목학회 1992 대한토목학회논문집 Vol.12 No.2
본 연구는 사여과지(砂濾過池)에 대한 여과저항이론(濾過抵抗理論)을 기초로 하여 폭기생물막(曝氣生物膜) 여과지(濾過池)의 여과저항이론을 구명(究明)하는 것이다. 여과저항(濾過抵抗)에 크게 영향을 미치는 인자로는 사여과지의 경우 주로 현탁성 부유물질인 반면에 폭기생물막 여과지의 경우는 여층(濾層)내의 여재(濾材)표면에 부착된 미생물막(微生物膜)의 증식(增殖)과 SS성분의 부착 그리고 상승하는 기포(氣泡)의 정체 등이 여충내의 여재간극(濾材間隙)을 폐새(閉塞)시킴으로서 여과저항(濾過抵抗)을 발생시킨다. 이러한 영향 인자들은 사여과저항(砂濾過抵抗) 이론(理論)에 접목시킨 결과 폭기생물막(曝氣生物膜) 이론식(理論式)을 도출할 수 있었다. 따라서 본 연구에서 제안된 폭기생물막 여과저항 이론식을 pilot plant를 통한 수처리실험(水處理實驗) 결과 이론치와 실험치가 잘 일치함을 보임으로서 실제 여과지(濾過池) 설계시 적용가능함을 알 수 있었다. The purpose of this research, through kinetic analyses and pilot plant experimentation of biofilm filtration reactor, is to study the theoretical equation of head loss in the Biofilm Reactor. The Head loss in the biofilm reactor has occurred due to the biofilm growth and the adhesion to the media surface and stagnation of upflow air bubble, which have caused the pore spaces to become smaller. On a basis of the head loss theory of sand filtration, therefore, the following equation of head loss for the biofilm reactor was proposed from this research results and proved to be possible to apply the equation for practical design of the biofilm filter. $h={\frac{h_o}{L}}{\int}^L_00.58\exp[-4.5){\sigma}_B)][{\frac{1-{\varepsilon}_o+({\sigma}_B)}{1-{\varepsilon}_o}}]^2{[\frac{{\varepsilon}_o}{{\varepsilon}_o-({{\varepsilon}_B)}}]^3dz$ here ${\sigma}_B=0.130+0.001{\theta}$.
급속여과지(急速濾過池)의 여과속도(濾過速度)와 여재구성(濾材構成)의 연구(硏究) -여과저항(濾過抵抗)을 중심(中心)으로-
강용태,Kang, Yong Tai 대한토목학회 1983 대한토목학회논문집 Vol.3 No.3
지금까지 발표되어 있는 여과공정(濾過工程)의 수학적(數學的) 해석(解析)의 결과(結果)는 범용성(汎用性)이 없고 실용적(實用的)으로 이용(利用)될 수 없는 문제점(問題點)이 있었다. 그러나 여과공정(濾過工程)을 수학적(數學的)으로 표현(表現)하는 것은 장치설계상(裝置設計上) 대단히 중요하기 때문에 본논문(本論文)은 급속여과지(急速濾過池)의 여과공정(濾過工程)을 해명(解明)하기 위하여 여층내(濾層內)의 tracer study의 결과(結果)를 정리한 것이다. 따라서 여과공정(濾過工程)을 해명(解明)하기 위해서 최대(最大)의 문제점(問題點)으로 되어 있던 억류물비퇴적량(抑留物比堆積量)을 직접(直接) 파악(把握)하는 것에 의해 Kozeny-Carman 식(式)을 보정(補正)하여 실제에 활용(活用)될 수 있는 미소여층(微小濾層)의 여과지저항식(濾過紙抵抗式)을 유도(誘導)하였다. 또 조지율(阻止率)과 비퇴적량(比堆積量)과의 상관(相關) model을 제안(提案)하고 이것을 이용(利用)해서 여과방정식(濾過方程式)을 풀고 그 값을 유도(誘導)한 여과저항식(濾過抵抗式)에 대입(對入)하여 전여층(全濾層)의 여과저항(濾過抵抗)을 구(求)하고 그 결과(結果)를 도표화(圖表化)함으로서 여과저항식(濾過抵抗式)을 이론(理論)과 실용(實用) 양면(兩面)에 넓게 활용(活用)될 수 있도록 하였다. In spite of extensive knowledge of the surface chemistry and the transport mechanism in filtration systems, there is still insufficient understanding of the physical characteristics of suspensions and the system components. Because of this, no filtration mechanisms are mathematically generalized to the full extent. The purpose of this paper is to propose experimental equations for the filtration process. using the tracer study in filter layer. Some of results are as follows. (1) The Volume of the specific deposit (${\sigma}$) in filtration was directly measurable using the tracer study without interrupting the filtration. (2) It was also confirmed that the head loss in filtration was greatly in fluenced by the micro-air babbles. (3) The correction coefficient(f) was introduced into the Kozeny-Carman equation in order to apply it for the clogging filter media. The coefficient(f) was experimentally obtained. The total head loss of the filter media is given by next equation. $${\frac{h}{h_0}}={\frac{1}{L}}{\int}^{z=L}_{z=0}f({\sigma})g({\varepsilon}_0,{\sigma})dz$$ $$f=aexp(-b{\sigma})$$ The above equation was applicable without regard to the variation of the suspension concentration, the filter medium diameter, the filter depth, the filtration velocity, and the amount of aluminum in all continuous filtration experiments. (4) The total head loss was graphically generalized assuming mathematical filtration models I II (see fig. 7,8) (5) The total head loss was obtained from the filtration model in the field filtration conditions. (see fig. 9,10)
침지식막 생물반응조의 처리특성과 중수도 적용성 평가에 관한 연구
강용태 ( Yong Tae Kang ),김태기 ( Tae Gi Kim ),조용현 ( Yong Hyun Cho ),박세찬 ( Se Chan Park ) 한국수처리학회 2002 한국수처리학회지 Vol.10 No.4
N/A Nowadays, Water is deteriorating with several reasons such as increase of wastewater which is flowed into river and limitation of water resource. In this study, reuse water system was configurated using submerged membrane bioreactor (SMBR) system consisted of anoxic, selector, and aerobic tank with membrane to concentrate on plans for securing of water resource by reusing wastewater treatment effluent. Estimation of application for reuse water and optimized HRT was found by comparing with the characteristics of treatment with HRT change. Also, we experimented the 1st floor and 2nd floor membrane to find more effective operating condition in the SMBR system. Specific characteristics of SMBR system was satisfied with the standard of reuse water as below 10㎎/L of BOD, below 5㎎/L of COD, 0 ㎎/L of SS without regard to change of HRT ranging from 2.3hr to 11.6hr. Optimized HRT was 2.3hr and air flow rate of the 2nd floor membrane module could be reduced 28.5% lower than that of the 1st floor membrane.
고속침전여과 시스템의 응집제 주입을 이용한 터널폐수 처리 연구
강용태 ( Yong Tae Kang ),송근관 ( Kune Kwan Song ),손정호 ( Jeong Ho Sohn ),김연은 ( Yun Eun Kim ) 한국수처리학회 2011 한국수처리학회지 Vol.19 No.6
In this paper, highrate clarifier filtration(HCF) system is operated for tunneling wastewater with coagulant. The purpose of this study is to investigate coagulant injecting position on HCF system and characteristics of heavy metals removal for tunneling wastewater treatment. The linear velocity(LV) of HCF column 1,2 were 300m/day and 150m/day, respectively. Characteristics of tunneling wastewater is neutral pH, Turbidity is experimented from 5943 to 357NTU. And optimum dosage of aluminum sulfate was 20mg/L that used this study. As a result, Coagulant injecting to HCF column 2 was more efficient for backwash cycle, because backwash cycle was 20% long over when 20mg/L of optimal alum injecting to HCF column 2. For Al, Fe and Mn reduction, the efficiency of HCF system were 95%, 98%, 98% respectively. It tend to similar with turbidity removal of HCF system.