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PRINCIPLE OF FROST PROTECTION BY HEATING WITH ANTIFROST CANDLES

 

STOPGEL, the leader in frost protection for 25 years. In partnership with CTIFL (French Technical Institute for Fruit and Vegetables), we have investigated the principle of frost protection by heating.

 

According to the studies carried out, in theory you need to produce close to 12,500,000 KJ per hour per hectare to address the heat loss during an episode of spring frost.

In practice, with the STOPGEL GREEN candle, which generates more than 25,000 KJ per hour, this means that you would need between 200 and 500 candles according to the frost intensity.

 

Sources :

Spring frost, Protection of orchards, CTIFL, 1998

Spring frost in orchards, Gard Chamber of Agriculture

 

COMPOSITION OF STOPGEL GREEN CANDLES

 

STOPGEL GREEN antifrost candles are of 100% natural origin.

The wax that we use to create STOPGEL GREEN candles is STEARIN.

 

With STOPGEL GREEN, we can therefore help you protect your crops in a more environmentally friendly way using antifrost candles that emit very little smoke.

STOPGEL GREEN also offers a more measured approach to frost protection. Using a raw material which is unique to our products, STOPGEL GREEN candles perform better as they have a significantly higher calorific value per hour than the “Other” candles on the market, thereby reducing the actual number of candles needed per plot of land.

 

 

COMPARISON OF THE CALORIFIC VALUE OF ANTIFROST CANDLES

 

STOPGEL GREEN candles produce 50% more energy than “Other” candles.

Therefore, you only need 2 STOPGEL GREEN antifrost candles when you would have needed 3 “Other” antifrost candles.

 

 

 

Calorific Value Generated per hour

 

Brand Type Composition Bruning Time * Net Weight of the Wax per Candle Wax burned per hour of ignition Theoretical Calorific Value **  

Calorific Value Generated per hour

 

hour KG KG/hour KJ/KG  

KJ/hour

 

STOPGEL GREEN, the new generation candle for responsible protection:

 

 

 
STOPGEL GREEN GREEN Stearin 8 5.1 0.638 39,940   25,462  

“Other” candles on the market according to data published by the manufacturers:

 

 

 
Paraffin Candle #1 PARAFFIN Petroleum 12 4 0.333 45,610   15,203  
Paraffin Candle #2 PARAFFIN Petroleum 12 4.5 0.375 45,200   16,950  
Paraffin Candle #3 PARAFFIN Petroleum 12 5.25 0.438 42,500   18,594  
Vegetable Candle #1 VEGETABLE Soya 10 4.5 0,450 38,540   17,343  

 

 

 

 

 

 

 

 

 

 

Number of candles to protect the plot in the same way

 

Brand Type Composition  

Calorific Value Generated per hour

 

Calorific Value compared with STOPGEL GREEN

 

Number of candles needed to protect the plot of land in the same way according to the frost intensity based on the STOPGEL guidelines
 

KJ/hour

  -2°C/ha -3°C/ha -4°C/ha

STOPGEL GREEN, the new generation candle for responsible protection:

STOPGEL VERTE VERTE Stearin   25,462   100 % 200 250 300

“Other” candles on the market according to data published by the manufacturers:

Paraffin Candle #1 PARAFFIN Petroleum   15,203   60 % 335 419 502
Paraffin Candle #2 PARAFFIN Petroleum   16,950   67 % 300 376 451
Paraffin Candle #3 PARAFFIN Petroleum   18,594   73 % 274 342 411
Vegetable Candle #1 VEGETABLE Soya   17,343   68 % 294 367 440

 

 

 

 

 

 

 

 

 

 

INSTALLATION OF STOPGEL GREEN CANDLES IN VINEYARDS AND ORCHARDS

 

Recommended density in Vineyards and Orchards according to the frost intensity

 

Temperature below 0°C

– 2°C

– 3°C

– 4°C

– 5°C à – 6°C

– 6°C à -7°C

Number of candles required per hectare

200

250 / 300

300 / 350

350 / 400

400 / 500

Figures given for a spring frost with no wind

Installation plan for STOPGEL GREEN candles

 

For a vineyard spaced 2 m x 1 m

Red : 250 to 300 candles per hectare for a frost between -3°C and -4°C
Blue : In addition, position another 150 to 200 candles per hectare, in anticipation of a frost from -4°C to -6°C to be ignited in a second phase if needed

 

 

Ignition of STOPGEL GREEN candles

 

 

 

Igniting STOPGEL GREEN candles
with Flamgel (portable gas lighter)

 

Approximately 5 to 7 seconds per candle

 

 

 

 

Igniting STOPGEL GREEN candles
with a Blowtorch

 

Approximately 10 to 12 seconds per candle

 

 

 

 

Igniting STOPGEL GREEN candles
with a Jerrycan

 

Quickest method

 

NB: videos show petroleum candles which we have not produced since 2016. The ignition principle is the same.

 

v.191219
*Average autonomy, which may vary depending on the weather conditions, wind, atmospheric pressure and the position of the candle.
**The calorific value is the theoretical amount of energy contained in a fuel.
DATA PROVIDED FOR GUIDANCE ONLY • TO BE ADAPTED ACCORDING TO LOCAL CONDITIONS
Calorific value generated per hour, calorific value compared with STOPGEL GREEN and number of candles needed calculated based on the data published by the manufacturers