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  #21  
Old 05-13-2005, 01:02 PM
LasVegas LasVegas is offline
 
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Posted by Tower...Gosh, Jonahs. I hate for you to get corrected twice in one thread. </div></BLOCKQUOTE>Whoa Tower. Let's not get hasty with the corrected word. I answered a question by H2Sin on discharge temperature. He didn't ask for the principles of air conditioning or how does humidity affect my system. Commercial buildings are designed for peak loads and extreme latent heat and then the DX (direct expansion) controlled by unloaders, bypass or other controls. Well designed vehicle systems are likewise designed for peak loads because of their extreme varying conditions, radiant heat, etc. and inexpensively controlled by cycling the compressor. They can do that because it's externally driven by the engine. Out of curiousity I connected my thermistor to the center duct for a day. During balanced operation it maintained a solid 20 degree split across the coil and at heavy load after sitting in the sun all day got as high as a 31 degree split for a short while. I then drove it through the car wash and had it call for maximum cooling. I'm sure you can guess the humidity and the split didn't change over 1 degree. The discharge temp actually went down but that's because of the lower ambient inside the car wash. Humidity DOES affect a/c but that wasn't the question and if the vehicle system is designed well you shouldn't notice a large change in discharge temperature. But then again, what do I know. I'm sure Google takes precedence over the 52,000 a/c service calls we've run the last 4 years.
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  #22  
Old 05-13-2005, 01:33 PM
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PARAGON PARAGON is offline
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<TABLE width="100%" border=1><A href="#tab2-817504">
<H4><FONT color=#254164>A/C Performance Table</FONT></H4></A>
<TBODY>
<TR>
<TH vAlign=bottom align=middle rowSpan=2>
<Font size=1>

Ambient Air Temperature</P></TH>
<TH vAlign=bottom align=middle rowSpan=2>
<Font size=1>

Relative Humidity</P></TH>
<TH vAlign=bottom align=middle colSpan=2>
<Font size=1>

Service Port Pressure</P></TH>
<TH vAlign=bottom align=middle rowSpan=2>
<Font size=1>

Maximum Left Center Discharge Air Temperature</P></TH></TR>
<TR>
<TH vAlign=bottom align=middle>
<Font size=1>

Low Side</P></TH>
<TH vAlign=bottom align=middle>
<Font size=1>

High Side</P></TH></TR>
<TR>
<TD vAlign=center align=middle>
<Font size=1>

13-16°C (55-65°F)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

0-100%</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

200-283kPa (29-41psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

945-1234kPa (137-179psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

11°C (52°F)</P></TD></TR>
<TR>
<TD vAlign=center align=middle rowSpan=2>
<Font size=1>

19-24°C (66-75°F)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

Below 40%</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

228-310kPa (33-45psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

1082-1413kPa (157-205psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

14°C (57°F)</P></TD></TR>
<TR>
<TD vAlign=center align=middle>
<Font size=1>

Above 40%</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

248-338kPa (36-49psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

1131-1469kPa (164-213psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

15°C (59°F)</P></TD></TR>
<TR>
<TD vAlign=center align=middle rowSpan=3>
<Font size=1>

25-29°C (76-85°F)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

Below 35%</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

276-379kPa (40-55psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

1303-1696kPa (189-246psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

18°C (64°F)</P></TD></TR>
<TR>
<TD vAlign=center align=middle>
<Font size=1>

35-60%</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

276-379kPa (40-55psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

1310-1709kPa (190-248psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

18°C (64°F)</P></TD></TR>
<TR>
<TD vAlign=center align=middle>
<Font size=1>

Above 60%</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

290-400kPa (42-58psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

1358-1765kPa (197-256psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

19°C (66°F)</P></TD></TR>
<TR>
<TD vAlign=center align=middle rowSpan=3>
<Font size=1>

30-35°C (86-95°F)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

Below 30%</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

317-434kPa (46-63psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

1544-2006kPa (224-291psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

22°C (72°F)</P></TD></TR>
<TR>
<TD vAlign=center align=middle>
<Font size=1>

30-50%</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

324-441kPa (47-64psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

1558-2034kPa (226-295psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

22°C (72°F)</P></TD></TR>
<TR>
<TD vAlign=center align=middle>
<Font size=1>

Above 50%</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

365-510kPa (53-74psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

1675-2179kPa (243-316psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

26°C (79°F)</P></TD></TR>
<TR>
<TD vAlign=center align=middle rowSpan=3>
<Font size=1>

36-41°C (96-105°F)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

Below 20%</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

400-552kPa (58-80psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

1917-2503kPa (278-363psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

28°C (82°F)</P></TD></TR>
<TR>
<TD vAlign=center align=middle>
<Font size=1>

20-40%</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

393-546kPa (57-79psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

1910-2496kPa (274-357psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

28°C (82°F)</P></TD></TR>
<TR>
<TD vAlign=center align=middle>
<Font size=1>

Above 40%</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

400-552kPa (58-80psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

1910-2496kPa (277-362psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

28°C (82°F)</P></TD></TR>
<TR>
<TD vAlign=center align=middle rowSpan=2>
<Font size=1>

42-46°C (106-115°F)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

Below 20%</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

448-621kPa (65-90psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

2172-2834kPa (315-411psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

31°C (88°F)</P></TD></TR>
<TR>
<TD vAlign=center align=middle>
<Font size=1>

Above 20%</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

462-634kPa (67-92psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

2220-2896kPa (322-420psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

32°C (90°F)</P></TD></TR>
<TR>
<TD vAlign=center align=middle>
<Font size=1>

47-49°C (116-120°F)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

Below 30%</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

531-731kPa (77-106psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

2379-3116kPa (347-452psi)</P></TD>
<TD vAlign=center align=middle>
<Font size=1>

43°C (109°F)</P></TD></TR></TBODY></TABLE>
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  #23  
Old 05-13-2005, 01:51 PM
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PARAGON PARAGON is offline
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I would just leave this alone Jonahs. I'll ignore the smartass google remark.

The table above is for the '03s A/C system. It is the max temp given ambient air temperature and relative humidity. You asked Intimidator what humidity had to do with it. Then proceeded to tell everyone they were wrong when they tried to explain it. Now you fling an insult and then attempt to cover up and say that the original question had nothing to do with humidity.

I guess all of the automotive climate engineers should just bow to your car wash experiments and forget the science behind their A/C performance table.
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  #24  
Old 05-13-2005, 07:59 PM
LasVegas LasVegas is offline
 
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Not trying to cover anything but God man, get a sense of humor. They're those that live in the engineer world and those in the practical world. And it wasn't an insult. Get the . Sheesh
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