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Circular Counterflow Cooling Tower

Open cooling towers are heat dissipation devices powered by natural wind. Featuring an open-air design, they require no mechanical ventilation equipment.

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Heat Exchangers and Pressure Vessels

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Product Introduction

The circular counterflow cooling tower is an industrial device utilizing counterflow air-to-heat exchange technology. Primarily employed in central air conditioning systems, power generation, chemical processing, light textiles, food processing, and other industries, it facilitates the cooling of circulating water. Its main structure features an all-steel construction with fiberglass panels as external cladding. The tower interior is filled with modified PVC inclined ladder-wave fill to maximize water distribution area, and is equipped with components including fans, motors, and automatic water replenishment systems.

Key Features

1) Structural Design: Circular configuration promotes uniform air distribution, enhancing cooling efficiency.

2) Material Advantages: Main body constructed from hot-dip galvanized steel for rust resistance; exterior FRP panels offer UV resistance and extended service life.

3) Reliable Operation: Large water collection basin capacity, equipped with manual/automatic water replenishment, drainage, and overflow pipes—eliminating the need for separate water tanks.

Application Scenarios

1) Central Air Conditioning Systems: Ideal for noise control requirements in hotels, hospitals, and similar facilities.

2) Industrial Applications: Widely used in power generation, chemical processing, light textiles, food processing, and other industries.

Structural Diagram

Model Specifications

Model	Parameters
	T=28℃ Cooling water flow rate (m³/h)		T=27℃ Cooling water flow rate (m³/h)		Primary Dimensions (mm)		Airflow (m³/h)	Fan Diameter (mm)	Motor Power (KW)	Inlet Water Pressure 10⁴Pa	NoisedB(A)			Diameter Dm
	△t=5℃	△t=8℃	△t=5℃	t=8℃	Overall Height	Maximum Diameter	Airflow (m³/h)	Fan Diameter (mm)	Motor Power (KW)	Inlet Water Pressure 10⁴Pa	Dm	10m	16m	Diameter Dm
DBNL3-12	12	9	15	10	2033	1210	7200	700	0.6	1.96	54	40.3	36.6	1.5
DBNL3-20	20	15	24	17	2123	1460	12400	800	0.8	2	54	41.1	37.5	1.5
DBNL3-30	30	22	35	27	2342	1912	18000	1200	0.8	2.21	55	43.5	39.9	1.8
DBNL3-40	40	30	46	34	2842	1912	21500	1200	1.1	2.6	55	43.5	39.9	1.8
DBNL3-50	50	37	57	44	2830	2215	28000	1400	1.5	2.65	55	44.7	41.1	2.1
DBNL3-60	60	44	68	51	3080	2215	32300	1400	1.5	2.9	56	45.7	42.1	2.1
DBNL3-70	70	51	79	60	3094	2629	39200	1600	2.2	2.78	56	47	43	2.5
DBNL3-80	80	61	92	70	3344	2629	43400	1600	2.2	3.03	56.5	47.5	43.5	2.5
DBNL3-100 GBNL3-70	100	74	114	86	3294	3134	56000	1800	3	2.86	57	50	46	3
DBNL3-125 GBNL3-80	125	92	142	108	3544	3134	67200	1800	4	3.15	58	50.7	47.4	3
DBNL3-150 GBNL3-100	150	112	171	129	3553	3732	84000	2400	4	2.9	58.5	52	48.6	3.6
DBNL3-175 GBNL3-125	175	131	200	150	3803	3732	94300	2400	5.5	3.15	59.5	53	49.6	3.6
DBNL3-200 GBNL3-150	200	153	231	180	3835	4342	112000	2800	5.5	3.01	60	54.6	51.3	4.2
DBNL3-250 GBNL3-175	250	186	283	215	4085	4342	134300	2800	7.5	3.26	61	55.6	52.3	4.2
DBNL3-300 GBNL3-200	300	225	334	260	4223	5134	168000	3400	7.5	3.5	61	56.8	53.5	5
DBNL3-350 GBNL3-250	350	267	395	304	4473	5134	187400	3400	11	3.75	61.5	57.3	54	5
DBNL3-400 GBNL3-300	400	301	455	341	4618	6044	224000	3800	11	3.6	62	58.8	55.7	5.9
DBNL3-450 GBNL3-350	450	343	514	387	4868	6044	242000	3800	11	3.85	62	58.8	55.7	5.9
DBNL3-500 GBNL3-400	500	375	576	427	5219	6746	280000	4200	15	3.7	62	60	56.9	6.6
DBNL3-600 GBNL3-450	600	454	680	516	5719	6746	302200	4200	18.5	4.2	63	61	57.4	6.6
DBNL3-700 GBNL3-500	700	528	790	600	5589	7766	393500	5000	18.5	3.95	63	61.4	58.4	7.6
DBNL3-800 GBNL3-600	800	590	890	685	6089	7766	408000	5000	22	4.45	63	61.4	58.4	7.6
DBNL3-900 GBNL3-700	900	685	1035	790	6040	8836	505200	6000	22	4.25	63.5	62.6	59.7	8.6
DBNL3-1000 GBNL3-800	1000	783	1139	880	6540	8836	510300	6000	30	4.75	64	63.1	60.2	8.6

Standard Cooling Tower Specifications

1. Noise levels are measured at the reference point Dm, defined as the distance from the tower wall diameter and 1.5 meters above the foundation (when the tower diameter is less than 1.5 meters, Dm=1.5 meters).

2. Standard design conditions for this series: Wet bulb temperature T=28°C, inlet water temperature t1=37°C, outlet water temperature t2=32°C. This results in a water temperature drop t=5°C and a approach temperature t2-T=4°C.

3. This table lists cooling water flow rates for reference when selecting conditions: T=28°C, t=5°C and 8°C, t2=32°C; and T=27°C, t=5°C and 8°C, t2=32°C. For cooling water flow rates under other parameters, consult the thermal performance curve.

4. Inlet water pressure refers to the water pressure at the connection point. 1 kgf/cm² = 9.8 × 10⁴ Pa. Therefore, the water pressure for this series ranges between 0.2 and 0.49 kgf/cm².

Industrial Cooling Tower Specifications:

1. Standard noise level <72 dB(A) when using planetary gear reducers. When using power belt reducers, the standard point noise level is equivalent to that of low-noise cooling towers of equal diameter.

2. The cooling water flow rates listed in this table for wet bulb temperatures T=28°C and T=27°C apply under the following conditions: - When water temperature drop t=10°C: Inlet water temperature t1=43°C, outlet water temperature t2=33°C. - When water temperature drop t=20°C and t=25°C: Inlet water temperatures t1 are 55°C and 60°C, respectively. The outlet water temperature t2 = 35°C.

3. Inlet water pressure refers to the water pressure at the connection point, where 1 kgf/cm² = 9.8 × 10 Pa. Therefore, the water pressure for this series ranges between 0.3 and 0.5 kgf/cm².