The Development of the Computer-Aided Design Software for the Air-Condition and Dehumidfying Finned-Tube Heat Exchangers
碩士 === 國立成功大學 === 機械工程研究所 === 84 === There are two parts in this paper . For the first part , annduced wind tunnel was used to measure the heat transfer andressure friction factor for circular finned-tube heat exch- ngers in both dry and wet conditions ....
| Main Authors: | , |
|---|---|
| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
1996
|
| Online Access: | http://ndltd.ncl.edu.tw/handle/89371644016699020534 |
| Summary: | 碩士 === 國立成功大學 === 機械工程研究所 === 84 === There are two parts in this paper . For the first part ,
annduced wind tunnel was used to measure the heat transfer
andressure friction factor for circular finned-tube heat exch-
ngers in both dry and wet conditions . The ambient tempera-ure
and humidity were controlled at 25 ℃ and 70﹪ . Thexperimental
results indicated that the sensible Colburn fac-or was 3~12﹪
higher than the Colburn factor for the dry coilsnd the wet
coils friction factor was 2~13﹪ higher than thatf the dry
coils . we also developed an equation to predicatehe heat
transfer coefficient of wet coils . By comparing with the
present experimental data , it wereound that Briggs＆Young''s
predications for dry coils wereood agreement with the
experimental data . Robinson＆Briggs''redications were higher
than the experimental data . Theew correlation of and factors
have been developed . The second part of this paper is to
develop an interactiveomputer - aided design software for both
circular finned-tubend plate finned-tube heat exchangers . In
the design logic ,e divided the coils into three cases by
comparing the coilsurface temperature and the dew point
temperature .1)completely dry : when the outlet dew point
temperature is higher than the coils surface temperature
.2)partially dry and partially wet : when the inlet dew point
temperature is higher than the coils surface temperature and
the outlet dew point temperature is lower than the coils
surface temperature .3)completely wet : when the inlet dew
point temperature is lower than the coils surface temperature
.his program was written by Quick BASIC language and can beun
in any personal computer . It can solve the rating pro-lem and
sizing problem friendly and rapidly . in plate-fin and tube
heat exchangers.of
|
|---|