Condensation and Heat UNI EN ISO

PROBLEM: CONDENSATION AND HEAT

SOLUTION: THE AUTOHOME TENT

by the Autohome technical team


Condensation is a natural phenomenon in camping tents.
When the temperature falls to lower than the temperature inside the tent, the moisture in the air condenses and clings to the inside walls of the tent in the form of droplets.
Generally, this happens in the evening, at night or at altitude when the fabric is fresher. The result is that the environment inside the tent becomes unhealthy and uncomfortable, unsuitable to a proper night’s sleep.


We say generally because condensation can be drastically reduced by using quality materials.
Dual layers really only hide the droplets from view and do nothing to prevent condensation.
Factors that lead to condensation include:
- the moisture in human breath
- hot air created during the day
- a rainy atmosphere, full of moisture
- body heat. Overnight our bodies generally lose about a third of a litre of water, in normal conditions of rest. And this water vapour needs to be allowed to escape, without forming puddles.
Recommendations to reduce condensation inside a tent include:
- keep the fabric taut, which is easy to do with Autohome and above all with Maggiolina models opened by handle. Moisture condenses and collects in the folds and wrinkles of the fabric.
- Ventilate the inside of the tent even when it rains, using the rain covers over the windows and doors.
- If the problem persists even after taking these actions, the fabric has lost its breathability, either because of dirt, dust or smog clogging up the pores. Clean the fabrics with shampoo (for example Marseilles soap).


The importance of breathability cannot be overstated.
Using fans or other gadgets, as competitors do, serves no purpose whatsoever as the test below shows. Essentially, these devices are just “commercial gadgets”, without any practical use, shunned by experts and appealing only to the inexperienced.

COMPARISON WITH A COMPETITOR: TEST IN A CLIMATIC CHAMBER

Tests carried out by the Certification and Analysis Centre, which works internationally on services to companies.
The staff comprises teams of engineers, physicists and microbiologists trained in applied research institutes working with European University research departments and other research centres.


AUTOMOTIVE DIVISION
Test set-up:

1. Stove in the competitor’s tent

1. Stove in the competitor’s tent

2. Thermocouple in the AUTOHOME tent

2. Thermocouple in the AUTOHOME tent

3. Generator of water vapour inside the competitor’s tent

3. Generator of water vapour inside the competitor’s tent

4. View of the competitor’s air circulation fan* from the outside

4. View of the competitor’s air circulation fan* from the outside

5. Thermocouples in the competitor’s tent

5. Thermocouples in the competitor’s tent

6. Generator of vapour in the Autohome tent

6. Generator of vapour in the Autohome tent

(* ) The competitor sample was equipped with a fan for air circulation within the same that has been turned on during the test. This fan is not compliant with Community regulations (it is not EU trademarked)

Description of the test

The test was carried out on two different samples to verify the exchange specified in ECE /TRANS219 REGULATION by calculating coefficient k as follows

A stove was placed inside both samples with two thermocouples in opposite corners of the ceiling to monitor the temperature. The climatic test involved creating a temperature of 8°C and, after stabilization of the environment inside the tents, the stove was switched to 31.5°C.
40 minutes later, the heat dispersal was measured in stable conditions.
The test was performed on two different samples in order to evaluate the heat exchange as defined by the ECE/TRANS/219 through the determination of the coefficient k is defined as follow:

W represent the thermal power dissipated by heather to maintain a constant temperature difference between the internal ad external environment of the sample;
S represent the heat exchange surface of the sample;
Dt temperature difference between inside and outside of the sample;
Within both samples it was placed a heater and two thermocouples to the two opposite corners of the ceiling to monitor the temperature. And a climate test by placing the environment at 8° C temperature and, once the expected stabilization of conditions even within the sample, the heater to bring the interior of the tent has been turned ‘was performed at 31.5°C.
After 40 min was detected the thermal power dissipated by the latter for the maintenance of the new climatic conditions. Having again awaited the stabilization of the same.


The results obtained are shown below:

 

A larger k coefficient k in the same conditions indicates greater heat exchange of the tent walls.

THE RESULTS ARE SURPRISING: WITHOUT USING A FAN OR OTHER DEVICE, DUE TO THE QUALITY OF THE FABRIC, THE AUTOHOME TENT EXPELLED MORE HEAT (24 HOURS A DAY, WITHOUT BATTERIES AND IN COMEPLETE SILENCE).

TEST DESCRIPTION 2

The test was performed on two different samples in order to evaluate the thermal exchange within the same by inserting a steam generator and evaluating after 20 min the presence or absence of condensation on the walls.

Test results:


COMPETITOR SAMPLE

Autohome Dachzelt - test
Roof Top Tents by Autohome Dachzelt - test

AFTER ONLY 20 MINUTES


AS CAN BE SEEN FROM THE PHOTOS OF THE INTERIOR DETAILS OF THE SAMPLES, ESPECIALLY METAL PARTS MORE SUBJECT TO THE FORMATION OF CONDENSATION ON THEIR SURFACE, THE PRESENCE OF THE LATTER TO CONCLUSION OF THE TEST WAS FOUND ONLY ON THE COMPETITOR SAMPLE.


AUTOHOME SAMPLE

Autohome Dachzelt - test
Roof Top Tents by Autohome Dachzelt - test

TRACES OF CONDENSATION ARE NOT DETECTED IN THE AUTOHOME SAMPLE