Open Cooling Towers

Open Cooling Towers for General and Corrosive Industrial Duty

Name: Open Cooling Towers
Brand: Huake Cooling

FRP round, square and cross-flow towers from small units to large steel-structure designs.

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AI illustration of a round FRP cooling tower

Illustrative

Overview

Open Cooling Towers

In an open cooling tower the circulating water is cooled directly by air as it falls through the fill. Huake builds these towers with fiberglass reinforced plastic (FRP) casings that resist corrosion and are light in weight, and also supplies large steel-structure towers.

Structure

Counterflow tower structure

A simplified view of an FRP counterflow cooling tower.

Hot water distributed

Hot water enters the distribution pipes and is sprayed evenly over the fill.

Counterflow cooling

Water falls through the fill while air is drawn upward from the louvers in the opposite direction.

Drift is captured

The drift eliminator removes water droplets from the air before it leaves.

Cooled water collected

Cooled water drops into the basin and returns to the process.

Cross-flow model

Cross-flow tower principle

A simplified view of a cross-flow FRP cooling tower (DBHZ2 series).

Water flows down

Hot water is distributed in the top basins and falls vertically through the fill.

Air flows across

Air enters from the sides and moves horizontally through the fill, at right angles to the water.

Heat is carried to the centre

The warm moist air gathers in the central air chamber and the fan draws it out of the top.

Cooled water collected

Cooled water drops to the basin and returns to the process.

Key features

Why it matters

Corrosion resistant

FRP casing for harsh environments.

Low noise

Low-noise fan options, and cross-flow models for noise-sensitive sites.

Modular

Easy installation and maintenance.

Packaged supply

Motors and fans supplied with the tower.

Gallery

Photos from our production and projects

Rows of cross-flow FRP cooling towers on a building roof

Green FRP cooling tower with several fans

Large cooling tower built over a water basin

Open cooling towers with piping on a construction site

Product range

Round FRP towers

HKL series (10T to 120T) and DBNL / GBNL low-noise series.

Square FRP towers

DFN, GFN series and large steel-structure GFNL series.

Cross-flow FRP towers

DBHZ2 series: low noise, light weight and a small footprint, suited to high-rise buildings and areas with strict noise requirements.

Technical data

Model selection tables

Main parameters of Huake open cooling towers (FRP round and square series). Values are for reference; thermal performance curves and project-specific selection are available on request.

Round FRP towers — HKL series (10T–120T)

Model	Total height (mm)	Diameter (mm)	Motor power (kW, 6-pole)	Fan diameter (mm)	Flow (m³/h)
HKL-10T	1850	1060	0.18	640	9
HKL-20T	2000	1200	0.37	770	18
HKL-30T	2100	1650	0.55	770	28
HKL-40T	2100	1650	0.55	770	38
HKL-50T	2300	1830	0.75	930	46
HKL-60T	2500	1920	1.12	1200	60
HKL-80T	2700	2200	1.52	1400	80
HKL-100T	2900	2700	2.2	1600	90
HKL-120T	3000	2900	3	1800	110

Round low-noise FRP towers — DBNL₃ series (12–1000 m³/h)

Model	Cooling water flow (m³/h)				Main dimensions (mm)		Air flow (m³/h)	Fan dia. (mm)	Motor (kW)	Inlet pressure (×10⁴ Pa)	Noise dB(A)			Tower dia. Dm (m)
	T = 28°C		T = 27°C		Total height	Max. dia.					Dm	10 m	16 m
	Δt=5°C	Δt=8°C	Δt=5°C	Δt=8°C	Total height	Max. dia.					Dm	10 m	16 m
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	100	74	114	86	3294	3134	56000	1800	3	2.86	57	50	46	3
DBNL₃-125	125	92	142	108	3544	3134	67200	1800	4	3.15	58	50.7	47.4	3
DBNL₃-150	150	112	171	129	3553	3732	84000	2400	4	2.9	58.5	52	48.6	3.6
DBNL₃-175	175	131	200	150	3803	3732	94300	2400	5.5	3.15	59.5	53	49.6	3.6
DBNL₃-200	200	153	231	180	3835	4342	112000	2800	5.5	3.01	60	54.6	51.3	4.2
DBNL₃-250	250	186	283	215	4085	4342	134300	2800	7.5	3.26	61	55.6	52.3	4.2
DBNL₃-300	300	225	334	260	4223	5134	168000	3400	7.5	3.5	61	56.8	53.5	5
DBNL₃-350	350	267	395	304	4473	5134	187400	3400	11	3.75	61.5	57.3	54	5
DBNL₃-400	400	301	455	341	4618	6044	224000	3800	11	3.6	62	58.8	55.7	5.9
DBNL₃-450	450	343	514	387	4868	6044	242000	3800	11	3.85	62	58.8	55.7	5.9
DBNL₃-500	500	375	576	427	5219	6746	280000	4200	15	3.7	62	60	56.9	6.6
DBNL₃-600	600	454	680	516	5719	6746	302200	4200	18.5	4.2	63	61	57.4	6.6
DBNL₃-700	700	528	790	600	5589	7766	393500	5000	18.5	3.95	63	61.4	58.4	7.6
DBNL₃-800	800	590	890	685	6089	7766	408000	5000	22	4.45	63	61.4	58.4	7.6
DBNL₃-900	900	685	1035	790	6040	8836	505200	6000	22	4.25	63.5	62.6	59.7	8.6
DBNL₃-1000	1000	783	1139	880	6540	8836	510300	6000	30	4.75	64	63.1	60.2	8.6

Noise is measured at the standard point Dm: a distance from the tower wall equal to the tower diameter, at 1.5 m above the foundation (Dm = 1.5 m for towers smaller than 1.5 m in diameter).
Standard design condition: wet-bulb temperature T = 28°C, inlet water t1 = 37°C, outlet water t2 = 32°C (Δt = 5°C), approach t2 − T = 4°C.
Flows are listed for T = 28°C and T = 27°C at Δt = 5°C and 8°C with t2 = 32°C, for selection reference. For other conditions, refer to the thermal performance curves.
Inlet pressure is measured at the pipe connection: 1 Kgf/cm² = 9.8×10⁴ Pa. The pressure of this series is 0.2–0.49 Kgf/cm².

Round low-noise FRP towers — GBNL₃ series

Model	Cooling water flow (m³/h)				Main dimensions (mm)		Air flow (m³/h)	Fan dia. (mm)	Motor (kW)	Inlet pressure (×10⁴ Pa)	Noise dB(A)			Tower dia. Dm (m)
	T = 28°C		T = 27°C		Total height	Max. dia.					Dm	10 m	16 m
	Δt=5°C	Δt=8°C	Δt=5°C	Δt=8°C	Total height	Max. dia.					Dm	10 m	16 m
GBNL₃-70	100	74	114	86	3294	3134	56000	1800	3	2.86	57	50	46	3
GBNL₃-80	125	92	142	108	3544	3134	67200	1800	4	3.15	58	50.7	47.4	3
GBNL₃-100	150	112	171	129	3553	3732	84000	2400	4	2.9	58.5	52	48.6	3.6
GBNL₃-125	175	131	200	150	3803	3732	94300	2400	5.5	3.15	59.5	53	49.6	3.6
GBNL₃-150	200	153	231	180	3835	4342	112000	2800	5.5	3.01	60	54.6	51.3	4.2
GBNL₃-175	250	186	283	215	4085	4342	134300	2800	7.5	3.26	61	55.6	52.3	4.2
GBNL₃-200	300	225	334	260	4223	5134	168000	3400	7.5	3.5	61	56.8	53.5	5
GBNL₃-250	350	267	395	304	4473	5134	187400	3400	11	3.75	61.5	57.3	54	5
GBNL₃-300	400	301	455	341	4618	6044	224000	3800	11	3.6	62	58.8	55.7	5.9
GBNL₃-350	450	343	514	387	4868	6044	242000	3800	11	3.85	62	58.8	55.7	5.9
GBNL₃-400	500	375	576	427	5219	6746	280000	4200	15	3.7	62	60	56.9	6.6
GBNL₃-450	600	454	680	516	5719	6746	302200	4200	18.5	4.2	63	61	57.4	6.6
GBNL₃-500	700	528	790	600	5589	7766	393500	5000	18.5	3.95	63	61.4	58.4	7.6
GBNL₃-600	800	590	890	685	6089	7766	408000	5000	22	4.45	63	61.4	58.4	7.6
GBNL₃-700	900	685	1035	790	6040	8836	505200	6000	22	4.25	63.5	62.6	59.7	8.6
GBNL₃-800	1000	783	1139	880	6540	8836	510300	6000	30	4.75	64	63.1	60.2	8.6

Noise is measured at the standard point Dm: a distance from the tower wall equal to the tower diameter, at 1.5 m above the foundation (Dm = 1.5 m for towers smaller than 1.5 m in diameter).
Standard design condition: wet-bulb temperature T = 28°C, inlet water t1 = 37°C, outlet water t2 = 32°C (Δt = 5°C), approach t2 − T = 4°C.
Flows are listed for T = 28°C and T = 27°C at Δt = 5°C and 8°C with t2 = 32°C, for selection reference. For other conditions, refer to the thermal performance curves.
Inlet pressure is measured at the pipe connection: 1 Kgf/cm² = 9.8×10⁴ Pa. The pressure of this series is 0.2–0.49 Kgf/cm².

Square counterflow FRP towers — DFN series (low temperature drop)

Model	Cooling water flow (m³/h) T = 28°C		Cooling water flow (m³/h) T = 27°C		Total height (mm) L / DP / GP	Width (mm)	Air flow (m³/h)	Fan dia. (mm)	Motor (kW) high / low speed	Inlet pressure (×10⁴ Pa)	Noise dB(A)			Equiv. dia. Dm (m)
	Δt=5°C	Δt=8°C	Δt=5°C	Δt=8°C							Dm	10 m	16 m
	Δt=5°C	Δt=8°C	Δt=5°C	Δt=8°C							Dm	10 m	16 m
DFNL / DFNDP / DFNGP-100	100	74.4	118.7	86.0	3830 / 4390 / 4690	2600	62000	1800	3.0 / 1.5	6.2	59.0	52	47.0	3.02
DFNL / DFNDP / DFNGP-150	150	109.8	175.1	126.9	4050 / 4670 / 4970	3000	84000	2100	4.0 / 2.0	6.3	60.5	54	50.6	3.47
DFNL / DFNDP / DFNGP-200	200	148.9	237.4	172.1	4340 / 4960 / 5260	3600	115000	2800	5.5 / 2.7	6.5	62.0	55.6	52.3	4.15
DFNL / DFNDP / DFNGP-300	300	224.9	350.6	258.3	5010 / 5690 / 5990	4300	158600	3400	7.5 / 3.7	5.8	62.0	57.8	54.4	4.94
DFNL / DFNDP / DFNGP-400	400	299.9	467.4	344.4	5300 / 6040 / 6340	4800	213000	3800	11 / 5.5	6.0	62.5	58.8	55.7	5.51
DFNL / DFNDP / DFNGP-500	500	374.9	584.3	430.4	5900 / 6700 / 7000	5300	265000	3800	15 / 7.5	6.4	62.5	59.3	56.2	6.08
DFNL / DFNDP / DFNGP-600	600	448.5	698.9	514.9	6140 / 6980 / 7280	6000	317500	4200	15 / 7.6	6.5	62.5	60.5	57.4	6.88
DFNL / DFNDP / DFNGP-750	750	561.7	875.3	644.9	6440 / 7290 / 7590	6800	400000	4200	22 / 11	6.8	63.0	61.4	58.4	7.79
DFNL / DFNDP / DFNGP-900	900	673.4	1049.5	773.2	6950 / 7900 / 8200	7300	490000	4700	30 / 15	7.0	63.8	62.9	60.0	8.36
DFNL / DFNDP / DFNGP-1050	1050	786.6	1225.9	903.1	7150 / 8100 / 8400	7800	556000	4700	30 / 16	7.0	64.6	63.1	–	8.93

Wet-bulb temperature τ = 28°C and τ = 27°C. Δt = 5°C: t1 = 37°C, t2 = 32°C; Δt = 8°C: t1 = 40°C, t2 = 32°C.
Noise values are for night-time low-speed motor operation with drip noise-absorbing pads. Without the pads, noise is 5 dB(A) higher than listed.
Model suffix: DFNL, DFNDP and DFNGP are the model variants; the three total heights are listed in the same order.
The 16 m noise value for DFN-1050 is being confirmed and will be updated.

Square counterflow FRP towers — GFN series (industrial, medium / high temperature drop)

Model	Cooling water flow (m³/h) T = 28°C			Cooling water flow (m³/h) T = 27°C			Total height (mm) L / DP / GP	Width B (mm)	Air flow (m³/h)	Fan dia. (mm)	Motor (kW)	Inlet pressure (×10⁴ Pa)	Noise dB(A) Dm	Dia. Dm (m)
	Δt=10°C	Δt=20°C	Δt=25°C	Δt=10°C	Δt=20°C	Δt=25°C
	Δt=10°C	Δt=20°C	Δt=25°C	Δt=10°C	Δt=20°C	Δt=25°C
GFNL / GFNDP / GFNGP-75	75	66.9	65.8	86.3	73.6	71.8	3830 / 4390 / 4690	2600	68000	1800	3.0	6.2	59	3.02
GFNL / GFNDP / GFNGP-100	100	89.2	87.7	115	98.1	95.7	4050 / 4670 / 4970	3000	88000	2400	4.0	6.3	60.5	3.47
GFNL / GFNDP / GFNGP-150	150	137.4	136.2	172.2	150.2	147.7	4840 / 5460 / 5760	3600	121000	2800	5.5	6.5	62	4.15
GFNL / GFNDP / GFNGP-200	200	182.8	181.3	229.1	199.8	196.5	5010 / 5690 / 5990	4300	161000	3400	7.5	5.8	62	4.94
GFNL / GFNDP / GFNGP-250	250	228.2	226.3	286	249.4	245.3	5300 / 6040 / 6340	4800	201000	3800	11	6	62.5	5.51
GFNL / GFNDP / GFNGP-300	300	273.6	271.3	342.9	299.1	294.1	5900 / 6700 / 7000	5300	241000	3800	11	6.4	62.5	6.08
GFNL / GFNDP / GFNGP-400	400	364.4	361.4	465.7	398.3	391.8	6140 / 6980 / 7280	6000	312000	4200	15	6.5	62.5	6.88
GFNL / GFNDP / GFNGP-500	500	455.2	451.5	570.5	497.6	489.4	6440 / 7290 / 7590	6800	401000	4200	22	6.8	63	7.79
GFNL / GFNDP / GFNGP-600	600	546	541.5	684.3	596.9	587.1	6950 / 7900 / 8200	7300	481000	4700	30	7	63.8	8.36
GFNL / GFNDP / GFNGP-700	700	638	632.7	789.6	697.4	685.9	7150 / 8100 / 8400	7800	560000	4700	30	7	64.6	8.93

Wet-bulb temperature τ = 28°C and τ = 27°C. Δt = 10°C: t1 = 42°C, t2 = 32°C; Δt = 20°C: t1 = 54°C, t2 = 34°C; Δt = 25°C: t1 = 60°C, t2 = 35°C.
Noise values are for night-time low-speed motor operation with drip noise-absorbing pads. Without the pads, noise is 5 dB(A) higher than listed.

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