Coffee roasting-- how to determine the temperature of entering beans

Professional coffee knowledge exchange More coffee bean information Please pay attention to coffee workshop (Weixin Official Accounts cafe_style)

When discussing baking before, I often heard people discussing the so-called explosion time and explosion temperature.

When I went home to practice, how did the result differ from what everyone said?

If your friends at the bake shop have a similar problem,

Could it be that you've made some mistakes in your choice of temperature for the beans?

Iridou

What Coffee Walker is going to say next, you may not agree with.

But this is some of our experience baking beans, just recently a friend in the discussion of this issue, so throw out for everyone to discuss

Before baking beans, we are used to recording our raw bean information

Before Coffee Walker dries beans, we record:

1. Green bean density 2. Green bean moisture content 3. Weather of the day (such as temperature, humidity, air pressure, etc.) 4. Batch quantity and number of pots, etc.

And making these records is not just blindly writing them down

In fact, we can learn the personality of this bean, and we can use this data to interpret beans and build our own database.

to determine their temperature: the temperature of the beans.

Simply put, beans with a higher density of green beans, beans with a lower temperature on the day of baking, beans with larger seeds, we would need more heat to achieve the same RoR.

So we're going to increase the temperature at which we enter the beans, and these are things that we can decide at the beginning to avoid.

Possible baking defects.

What is a baking defect?

For example: Burning on surface caused by excessive temperature of beans or

Or caused by too low a temperature

But! which is the most important thing.

Walker felt that the key to the real impact of the temperature of the beans was the baking rhythm.

A good entry temperature can help you go to heaven. With a stable fire damper, you can establish a healthy baking rhythm.

Avoid flavor variations caused by unstable parameter adjustments, such as

For more information about the effects of flavor, see this article shared by Scott Rao.

And what we're going to talk about next is what we think is the key influence of temperature.

In the coffee walker's roasting experience, high temperatures lead to faster roasting rhythms, resulting in very fast ROR spikes,

In the case of full heat engine, when you find that the temperature point is too high, adjust the firepower, basically there is a certain difficulty to change the rhythm.

If the rhythm is too fast, it may cause the internal pressure of the beans to accumulate rapidly and explode rapidly, resulting in a crash situation in ROR.

And when you crash, if you don't quickly turn down the fire and maintain the same fire heating, then there is no surprise Flick!

So much to say, of course, to experiment.

Experimental methods:

Guatemala same beans, same amount of beans

Parameters: (a) group high temperature into beans because of high temperature into beans set initial fire 20% (b) group set initial fire 50%

Damper parameters unchanged

Turn off the fire when ROR rises during development.

Development period setting>20% (assuming Flick is visible)

Different temperature of entering beans

Although the fire setting was different, we lowered the fire by 30% from high to warm, but we still couldn't save the overall baking rhythm.

The importance of the temperature of the beans can be seen; the two pictures below represent

(a)High temperature into beans

(b)Low temperature into beans

From these results, it can be inferred that if a proper temperature is selected for the beans, the overall baking rhythm will be very comfortable, and some defects can be avoided at the same time (the reaction is more obvious on the small platform baking machine). Of course, with the different baking machines, each batch size is different, and these may need to be re-verified.

Professional coffee knowledge exchange More coffee bean information Please pay attention to coffee workshop (Weixin Official Accounts cafe_style)