Dew Point

[Allesreinwasgeht]

Hi There,

this will be my first post.

I cant find a solution for a dew point calculation by using homelync.

my system is collecting inside and outside humidity plus inside and outside temp. all in 0-255 coming from an analog input. so dont bother about units.

1/15/1 Hum.i (0-255) 
1/15/2 Temp.i (0-255)
1/15/11 Hum.o (0-255)
1/15/12 Temp.o (0-255)

the aim is to start vents in case of a good result (max drying) only. the trigger is the dewpoint of air coming from outside.

1/3/1 Vent.start (1Bit)

maybe there is a workaround.

best

(as you can see, my native language is german

[admin]

Dew point calculation:

Code:

hum = 60 -- 0..100% range
temp = 10 -- temperature in deg C
dew = ((hum / 100) ^ (1 / 8)) * (112 + (0.9 * temp)) + 0.1 * temp - 112
log(dew)

[Allesreinwasgeht]

Dew point calculation:

Code:

hum = 60 -- 0..100% range
temp = 10 -- temperature in deg C
dew = ((hum / 100) ^ (1 / 8)) * (112 + (0.9 * temp)) + 0.1 * temp - 112
log(dew)

Thanx.

whats the log(dew) for?

best

[admin]

This way you can see variable contents in Logs tab: http://openrb.com/docs/lua.htm#log

[Allesreinwasgeht]

This way you can see variable contents in Logs tab: http://openrb.com/docs/lua.htm#log

THX