UCO candle lantern, in a freezing tent, can it change condensation and warm? Pt 2, two man tent.
14 هزار بار بازدید -
4 سال پیش
-
Can a UCO candle lantern
Can a UCO candle lantern really influence in a 2 man tent the crucial factors of Temperature, Humidity and Dew Point when camping in cold damp freezing winter conditions?
Raising funds here for equipment for my scouts unit https://www.buymeacoffee.com/fellmandave
In Part 1, I looked at 1 man tent effect on warmth and discuss the factors that influence tent heat loss and humidity : UCO Candle Lantern, Can it warm a fre...
In this Part 2 I take it further than just measuring temperature and measure relative humidity and dewpoint too. These are the key indicators for when condensation in a tent may form.
T
Only the most rigorous need watch! Scan through if you like and check against the results below.
The instrument I was using is the kestrel 3000, the candle lantern is the UCO standard, the tent is the Exped Mars II extreme 4 season tent.
Contents.
Aims: 0:00
Night 1: 4:42
Night 2: 13:00
Conclusions: 22:32
T= Temperature centigrade
H= relative Humidity %. The percentage of the amount of water vapor actually present in the air to the greatest amount possible at the same temperature.
D= Dewpoint . This the Temperature to which the air must be cooled at a constant pressure for water vapour to condense into water. Calculated from temperature and relative humidity.
I measure these factors over two nights. I show the change below from the previous reading in brackets with a ( – ) minus indicating a downward trend and a (+ ) plus indicating an upward trend.
On night one I had the tent zipped up and sealed just in the evening only with at least 20 min gap to stabilise between readings.
Results, Night 1.
External T -0.2 H 92.8 D -0.5 .
tent empty- T0.3 (-0.1) H 78.2 ( 14.6) D -0.9 (-.4).
tent empty with candle- T 1 (+1.3) H 76 (-2.2) D -3.9 (-3.0)
te 1 person, plus candle- T 9.2 (+8.2) H 68.5(-7.5) D 3.2 (+7.1)
Significant stat here is with the candle the difference between the temperature and dewpoint increased by a gap of 0.6 c to 4.9, making condensation less likely and then when occupied to 6.
On night 2 we slept in all night and I went for more real world conditions with external vents open and part of the mesh door open.
Results night 2-
Much more challenging and variable conditions on this night
External T 6 H 72 D 0.4
tent empty T 6.3 (+0.3) H 73(+1) D 0.3 (-.1)
empty with candle T 7 (+0.7) H 79(+6) D 1.2(-+0.9)
2 person,plus candle T 15 (+8.) H 67 (-12) D 10.2 (+10)
2 person no candle- T 12.2 (-2.8) H 73(+6) D 8 (-1.8)
In morning
No candle on waking T 5.5 (-6.7) H 89.3(+16.3) D 3.2 (-4.8)
After 20 mins with candle T 7.9 (+4.2) H 99.8(-+10.5) D 7.4 (+4.2)
After 1 hr with candle lit. T 9.2 (=1.7) H 85.3(-14.5) D 3.2 (-4.2)
Most significant stat on night 2 is that the gap from the dewpoint to the temp stayed steadily at around 6 degrees, then got worse to 4 in the tent with the candle out.
In the morning we had a 2 degree gap or less until the candle hap been on a long time then it increased into a 6 degree gap and drying out started.
Conclusions!
The measurements were at the same level as the candle, lower down at floor level they were typically 1 degree lower.
The UCO candle lantern will raise the temperature and lower humidity over 20 minutes, with the influence greater in a smaller tent.
The biggest influence is the human body. Especially getting into the tent at first, the candle plus body raises the temperature and lowers humidity.
Overnight in these conditions we got high humidity, resulting in condensation, despite some ventilation. However conditions were at some of the worst with melting snow and rising temperatures and little wind.
Humidity went even worse when getting out of the sleeping bag and moving around.
Lighting the candle seemed to make no change after 20 mins.
Then the warming and drying effect started to tip over and the humidity started to drop and the damp on the surface of my sleeping bag and on the inside of the inner tent started to improve and dry. This took over 45 minutes to achieve though with the candle lit. No change was seen on the fly which was very wet still.
Lessons learnt- applying to these particular winter conditions
Ventilate more when you get out of your bag.
The candle adds a pleasant light and meaningful warmth in a sealed tent
In a short period of time when first getting in its ok to have the tent sealed as the warmth will rise and the humidity will also lower. But over time you should start to ventilate as humidity rises, especially when you put the candle off.
Its worth putting the candle on in the morning if you’ve got a leisurely start and things are damp.
Raising funds here for equipment for my scouts unit https://www.buymeacoffee.com/fellmandave
In Part 1, I looked at 1 man tent effect on warmth and discuss the factors that influence tent heat loss and humidity : UCO Candle Lantern, Can it warm a fre...
In this Part 2 I take it further than just measuring temperature and measure relative humidity and dewpoint too. These are the key indicators for when condensation in a tent may form.
T
Only the most rigorous need watch! Scan through if you like and check against the results below.
The instrument I was using is the kestrel 3000, the candle lantern is the UCO standard, the tent is the Exped Mars II extreme 4 season tent.
Contents.
Aims: 0:00
Night 1: 4:42
Night 2: 13:00
Conclusions: 22:32
T= Temperature centigrade
H= relative Humidity %. The percentage of the amount of water vapor actually present in the air to the greatest amount possible at the same temperature.
D= Dewpoint . This the Temperature to which the air must be cooled at a constant pressure for water vapour to condense into water. Calculated from temperature and relative humidity.
I measure these factors over two nights. I show the change below from the previous reading in brackets with a ( – ) minus indicating a downward trend and a (+ ) plus indicating an upward trend.
On night one I had the tent zipped up and sealed just in the evening only with at least 20 min gap to stabilise between readings.
Results, Night 1.
External T -0.2 H 92.8 D -0.5 .
tent empty- T
tent empty with candle- T 1 (+1.3) H 76 (-2.2) D -3.9 (-3.0)
te 1 person, plus candle- T 9.2 (+8.2) H 68.5(-7.5) D 3.2 (+7.1)
Significant stat here is with the candle the difference between the temperature and dewpoint increased by a gap of 0.6 c to 4.9, making condensation less likely and then when occupied to 6.
On night 2 we slept in all night and I went for more real world conditions with external vents open and part of the mesh door open.
Results night 2-
Much more challenging and variable conditions on this night
External T 6 H 72 D 0.4
tent empty T 6.3 (+0.3) H 73(+1) D 0.3 (-.1)
empty with candle T 7 (+0.7) H 79(+6) D 1.2(-+0.9)
2 person,plus candle T 15 (+8.) H 67 (-12) D 10.2 (+10)
2 person no candle- T 12.2 (-2.8) H 73(+6) D 8 (-1.8)
In morning
No candle on waking T 5.5 (-6.7) H 89.3(+16.3) D 3.2 (-4.8)
After 20 mins with candle T 7.9 (+4.2) H 99.8(-+10.5) D 7.4 (+4.2)
After 1 hr with candle lit. T 9.2 (=1.7) H 85.3(-14.5) D 3.2 (-4.2)
Most significant stat on night 2 is that the gap from the dewpoint to the temp stayed steadily at around 6 degrees, then got worse to 4 in the tent with the candle out.
In the morning we had a 2 degree gap or less until the candle hap been on a long time then it increased into a 6 degree gap and drying out started.
Conclusions!
The measurements were at the same level as the candle, lower down at floor level they were typically 1 degree lower.
The UCO candle lantern will raise the temperature and lower humidity over 20 minutes, with the influence greater in a smaller tent.
The biggest influence is the human body. Especially getting into the tent at first, the candle plus body raises the temperature and lowers humidity.
Overnight in these conditions we got high humidity, resulting in condensation, despite some ventilation. However conditions were at some of the worst with melting snow and rising temperatures and little wind.
Humidity went even worse when getting out of the sleeping bag and moving around.
Lighting the candle seemed to make no change after 20 mins.
Then the warming and drying effect started to tip over and the humidity started to drop and the damp on the surface of my sleeping bag and on the inside of the inner tent started to improve and dry. This took over 45 minutes to achieve though with the candle lit. No change was seen on the fly which was very wet still.
Lessons learnt- applying to these particular winter conditions
Ventilate more when you get out of your bag.
The candle adds a pleasant light and meaningful warmth in a sealed tent
In a short period of time when first getting in its ok to have the tent sealed as the warmth will rise and the humidity will also lower. But over time you should start to ventilate as humidity rises, especially when you put the candle off.
Its worth putting the candle on in the morning if you’ve got a leisurely start and things are damp.
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