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Cold Air Drying Machine

Cold Air Drying Machine applying low temperature dehydration which is the most similar to natural environment makes excellent smell,
flavor and texture of food and produces better quality food than heat drying. Its heat pump system is also cost effective.

Product Features

All-weather Drying

It guarantees uniform production and quality of food regardless of season and weather condition.

Pollution-free, Clean Drying

It solves all problems (product deterioration, gas absorption, fire risk, etc.) caused by the hot air drying (using direct fired heat).

Drying food in the original state

It maintains the original flavor, smell and color of dried food, and nutrients including protein are not destroyed during the drying process.

Energy Saving Dehydration

Since it uses a special heat exchanger and heat waste from a freezer, the electrical cost is much cheaper than oil (diesel) used in a hot air dryer.
(It can save over 50% energy, comparing to using a warm air dryer.)

Productivity Enhancement
and Convenient Storage

Comparing to using a hot air dryer, it enhances productivity and makes the storage easy after the dehydration.
(It can enhance productivity over 20%, comparing to using a warm air dryer.)

Easy-to-control

Temperature and humidity for a drying room can be easily selected for automatic operation by the food to dehydrate.

	Hot Air Dehydration	Cold Air Dehydration
Drying Method	Drying with the heated air by direct fired heat using a burner	Drying in the method of heat pump using waste heat from a compression freezer
Used Equipment	Burner and ventilator	Freezer, pump and airing ventilator
Heat Source	Diesel, electricity	Electricity
Operating Duration	8 months (unusable in summer)	(usable for) 12 months
Quality State	Possibility of quality change & discoloration (nonuniform product)	Original state maintenance (uniform product)
Product Location	Need to change the rack location (every 3~4 hours)	No need to change the rack location
Operating Staff	1 staff on standby	Unmanned operation
Drying Hours	48 hours/3.5 TON (semi-dried pollack)	48 hours/3.5 TON (semi-dried pollack)
Fire Risk	Dangerous	Safe
Installation Space	Large space needed	Space saving

Comparison of cost saving for drying energy

	Hot Air Dehydration		Coll Air Dehydration
Equipment	Burner	Burner	Freezer	Motor
Heat Source	Diesel	Diesel	Electricity	Electricity
Unit Cost (a)	KRW550/ ℓ	KRW550/ ℓ	KRW85/kW	KRW85/kW
Calorific Value	9,200㎉/ℓ	9,200㎉/ℓ	860㎉/㎾	860㎉/㎾
Unit Cost per 1000㎉ (c=a/bx1000)	KRW59.7	KRW59.7	KRW81.3	KRW81.3
Efficiency or Performance Factor	0.9	0.9	COPH2	1.0
Unit Cost per 1000㎉ (d=c/e)	KRW66.3	KRW66.3	KRW49.4	KRW98.8
Monthly Consumption (f)	6,000ℓ	6,000ℓ	28,800㎾	12,400㎾
Calorific Value per 1000㎉ (g=b/1000)	9.2㎉/ℓ	9.2㎉/ℓ	0.86㎉/㎾	0.86㎉/㎾
Monthly Cost (h=dxfxg)	3,659,760	3,659,760	1,223,999	1,223,999
Monthly Cost (h=dxfxg)	4,577,759		4,577,759

※ Remarks) ① Electric rate is based on the low-pressure power for industrial electricity (gap).
② Basic rate of electricity varies by the capacity (basic rate = KRW3,510/kWH)
③ The case of semi-dried pollack on 14 racks (drying room size : 10.4Mx4x3M) were used for the comparison.

Drying Hours

NO	Product	Drying Temperature(℃)	Drying Hours
1	Fruits	20~30	6~12
	Pear	25~35	15~25
	Big dried persimmon	20~30	100~150
2	Vegetables	30~40	12~48
	Chili	30~40	40~48
	Carrot	30~40	12~48
	Garlic	30~40	12~48
	Radish	30~40	12~48
	Shiitake	30~40	12~48
3	Fishery Products	15~25	15~30
	Squid	15~25	15~30
	Pollack	15~25	15~30
	Anglerfish	15~25	40~60
4	Meat	15~25	15~30
5	Medicinal Herbs	15~40	각기다름
6	Medicines	20~30	각기다름

This data is based on dried (semi-dried) products available on the market.

Drying TestDrying tests for products are available when you visit our head office.

Product Specifications (Movable)

	HUD-301M	HUD-301S	HUD-302S
Size	On demand	240011002000	330016002500
Compressor	On demand	2HP	4HP
Drying Capacity per Cycle	On demand	60KG	180KG
Number of Tray	On demand	11	60
Tray Size	On demand	91061055	780670100
Required Electricity	On demand	2.2KW/H	3.8KW/H
Workable Power		220V/380V	380V

Product Specification (Stationary)

		HUD-302	HUD-303	HUD-305	HUD-307	HUD-309	HUD-311
Number of Rack (tray)		4 (72)	6 (108)	12 (216)	16 (288)	25 (450)	36 (648)
Cooling Capacity (KCAL/HR)		14,000	14,000	30,000	60,000	73,000	92,000
Dehumidifying Capacity (KG/HR)		10	10	20	40	50	60
Compressor (HP)		4	5	10	20	30	40
Ventilator (HP)		2	3	9	15	26	35
Capacity per Cycle		0.3 Ton	0.5 Ton	1 Ton	1.6 Ton	2.2 Ton	3.2 Ton
Size of Drying Room	Length (M/M)	3,000	3,600	5,000	7,500	7,600	7,600
	Width (M/M)	2,000	2,500	2,700	3,200	3,900	4,700
	Height (M/M)	2,800	2,800	3,000	3,000	3,000	3,000

※ 1. The rack size is 800(L)x700(W)x1950(H).
2. Inlet air condition of the dehumidifying capacity is 30℃ for dry bulb temperature (DB) and 60％ for relative humidity (RH).
3. Since the drying room size is for fishery products, it varies by the product to dehydrate.
4. Make-to-order is possible for products other than the standard specification.

Cool Air Drying Machine / Frozen Storage Concurrent Building

Hanul ENG builds a cool air drying machine and frozen storage at the same time, so that the process from food dehydration to storage can be done at a time. Quotation for the additional building will be estimated upon request.

Cold AirDrying Machine

Cold AirDrying Machine

Cold Air
Drying Machine

Cold Air
Drying Machine