សិល្បៈ
សម្រស់ និង សុខុមាលភាព
សិប្បកម្ម
វប្បធម៌ និង ប្រវត្តិសាស្ត្រ
ការកម្សាន្ត
បរិស្ថាន
ម្ហូប និង ភេសជ្ជៈ
វិស្វកម្មបញ្ច្រាស
វិទ្យាសាស្ត្រ
កីឡា
បច្ចេកវិទ្យា
ប្រដាប់ដែលស្លៀក
Youblob (generated from this blueprint's notebook) · CC0
Drying Grain for Storage: Warm Air That Carries the Water Away
Grain harvested damp heats, moulds and spoils in the bin. Left to dry in the field it shatters and is lost. Drying brings it down to a moisture at which it keeps — the figure storage guidance gives for the crop and the length of storage, commonly around 13–14 % (wet basis) for wheat — by blowing air through it, warmed so that it can carry more water.
Everything about a dryer follows from two calculations: how much water must go, and how much it takes each kilogram of air to carry it. The air's temperature and humidity decide both how far the grain can dry and how much fuel it costs.
This rung works out the water to remove, the air and heat it needs, and dries a batch of wetted wheat on the bench, weighing it as it goes.
មធ្យម
About 5 hours
ការណែនាំ
1
1
Water to remove, air and heat to remove it
Water to remove, air and heat to remove it
កំពុងផ្ទុកសៀវភៅ Jupyter…
2
2
Measure the air first
Measure the air first
Drying depends on the air's temperature and humidity. The embedded blueprint builds the instrument that measures both; use it on the air going in and coming out.
3
3
Wet a batch of wheat to a known moisture
Wet a batch of wheat to a known moisture
Find the moisture of your wheat berries first: weigh 20 g into a dish, dry it in the oven at about 105 °C and reweigh every hour until the mass stops falling. The loss divided by the starting mass is its moisture, wet basis. (This is a simple reference, not an official grain-moisture method.)
Weigh 1 kg of the wheat into a jar. Work out the water to add to bring it to 20 % wet basis — the dry matter stays fixed, so the target wet mass is dry mass ÷ 0.80. Add the water, seal the jar, shake it, and leave it overnight so the kernels take it up.
សម្ភារៈសម្រាប់ជំហាននេះ៖
គ្រាប់ស្រូវសាលីទាំងមូល2 kilogram
ទឹក1 លីត្រឧបករណ៍ដែលត្រូវការ៖
ជញ្ជីងឌីជីថលផ្ទះបាយ
ដបកញ្ចក់
នាឡិកាបញ្ឈប់4
4
Dry it and follow the curve
Dry it and follow the curve
Make a drying box: a plywood box open at the top, with a mesh screen floor 50 mm above its base and a side inlet below the mesh. Blow air in with the box fan through a cardboard duct, with the heat gun on its lowest setting aimed into the duct. Keep the air under the mesh below 50 °C — check with the thermometer — so the heat gun is never near the grain.
Spread the damp wheat on the mesh 50 mm deep. Weigh the whole box every 15 minutes. From the fixed dry matter, work out the moisture at each weighing and plot it against time. Read the psychrometer on the air entering and leaving: at first the outgoing air is cool and humid; as the grain nears dryness it leaves warmer and drier, and drying slows. Stop at 14 %.
សម្ភារៈសម្រាប់ជំហាននេះ៖
ចម្រោះសំណាញ់1 ដុំ
សន្លឹកឈើបន្ទះ1 ដុំ
សន្លឹកក្រដាសកាតុងរលក1 ដុំឧបករណ៍ដែលត្រូវការ៖
កង្ហារប្រអប់ (ល្បឿនប្រែប្រួល)
កាំភ្លើងខ្យល់ក្តៅ
ទែម៉ូម៉ែត្រផ្ទះបាយ
ឧបករណ៍វាស់ល្បឿនខ្យល់កាន់ដៃជញ្ជីងឌីជីថលផ្ទះបាយនាឡិកាបញ្ឈប់
ស្វានឥតខ្សែ5
5
A drying batch that is not drying well
A drying batch that is not drying well
Grain drying problems and what they point to.
Flow
Loading...
6
6
Context and honest limits
Context and honest limits
Drying grain with forced air replaced drying it standing in stooks, and made combining possible in damp climates. On-farm bins with a perforated floor and a fan, with or without heat, and continuous-flow dryers work by the same balance.
**Honest limits.** The notebook assumes the air leaves at a fixed humidity; in a real bin it changes as the drying front moves. The safe storage moisture depends on the crop, the temperature and how long it is kept — use local guidance, not the notebook. Grain dryers carry a fire risk from dust and chaff; never leave a heated dryer unattended.
សម្ភារៈ
5- 2 kilogramកន្លែងទុក
- 1 លីត្រកន្លែងទុក
- 1 ដុំកន្លែងទុក
- 1 ដុំកន្លែងទុក
- 1 ដុំកន្លែងទុក
ឧបករណ៍ចាំបាច់
8- កន្លែងទុក
- កន្លែងទុក
- កន្លែងទុក
- កន្លែងទុក
- 1 vendor sell this, none ship to you yetកន្លែងទុក
- កន្លែងទុក
- កន្លែងទុក
- 1 vendor sell this, none ship to you yetកន្លែងទុក
ប្លង់ពាក់ព័ន្ធ
ប្លង់ទាំងនេះចែករំលែកចំណេះដឹង — បច្ចេកទេស សម្ភារៈ ឬគោលការណ៍
The Wet-and-Dry Bulb Psychrometer
ដោយ Penny
ទែម៉ូឌីណាមិក
24
0
0
0
0
0
Equilibrium Moisture Content: The Wood Is Always Chasing the Room
ដោយ Woody
ការធ្វើការឈើ
20
0
0
0
0
0
Egyptian Grain Silo — Constructing a Beehive-Shaped Grain Silo
ដោយ Emma
ការធ្វើកំបោរ
96
0
0
0
0
0
The Bin That Stops Flowing: Arching, Ratholing, and the Gate That Causes It
ដោយ Martin
ការធ្វើការលោហៈ
3
0
0
0
0
0
The Sirocco Fan: Many Shallow Forward-Curved Blades
ដោយ Emma
មេកានិក
1
0
0
0
0
0
CC0 សាធារណៈ
ប្លង់នេះត្រូវបានចេញផ្សាយក្រោម CC0។ អ្នកមានសិទ្ធិចម្លង កែប្រែ ចែកចាយ និងប្រើប្រាស់ដោយមិនចាំបាច់សុំអនុញ្ញាត។
គាំទ្រអ្នកបង្កើតដោយទិញផលិតផលតាមរយៈប្លង់របស់ពួកគេ ដែលពួកគេទទួលបាន កម្រៃជើងសារអ្នកបង្កើត កំណត់ដោយអ្នកលក់ ឬបង្កើតកំណែថ្មីនៃប្លង់នេះ ហើយបញ្ចូលជាការតភ្ជាប់ក្នុងប្លង់របស់អ្នកដើម្បីចែករំលែកចំណូល។