ZL-15T 15 Ton Industrial FRP Counter Flow Cooling Tower for Engineering Specifications
The ZL-15T FRP counter flow cooling tower delivers 52.75 kW heat rejection at 15 refrigeration tons with 11.7 m3/h water flow rate. The following sections detail engineering specifications, operational considerations, and application-specific integration guidance for the ZL-15T.
The 15-ton ZL-15T is rated at 52.75 kW of heat rejection under CTI STD-201 design conditions (95°F inlet water, 85°F wet-bulb, 5°F range). The flow rate of 11.7 m3/h is calibrated to a 5°C temperature drop across the fill media, which is the standard range for induced-draft counter-flow cooling towers. At this flow rate, the ZL-15T delivers exactly 52.75 kW of heat rejection when the leaving water temperature reaches 32°C against a 27°C wet-bulb. For applications requiring higher temperature drops (8-10°C), the tower can accept lower flow rates while maintaining the same 52.75 kW heat duty, provided the wet-bulb approach stays within 5°C of design. This makes the ZL-15T suitable for small commercial facilities (300-800 m²), 100-200 ton injection molding, 50-100 seat restaurants, small server rooms where standard HVAC loop conditions apply.
The wet-bulb approach is the most critical performance metric for any cooling tower. It represents the difference between the leaving water temperature and the ambient wet-bulb temperature. Under standard design conditions (27°C WB), the ZL-15T achieves a 5°C approach, meaning the leaving water reaches 32°C. As ambient conditions deviate from design, the approach varies predictably: at WB 24°C the leaving water drops to 29°C; at WB 30°C (hotter climate) the leaving water climbs to 35°C; at WB 21°C the leaving water drops to 26°C. The ZL-15T's 140 CMM airflow at 635 mm fan diameter is specifically sized to maintain this 5°C approach across the expected operating range. Off-design performance is documented in CTI thermal performance curves and is reproducible year-over-year when water flow and chemistry remain within design limits.
The ZL-15T uses counter-flow geometry where water falls downward through the fill media while air rises upward through the same media. This counter-flow arrangement provides 15-20% better thermal performance than cross-flow designs at the same airflow rate. The tower diameter of 1180mm and height of 1760mm are optimized for the 11.7 m3/h water flow rate: the diameter provides sufficient cross-sectional area for 140 CMM airflow to reach every part of the fill media, while the height ensures water spends adequate residence time in contact with the rising air stream. PVC film fill media is standard for low-fouling operation, with optional cellular drift eliminators reducing drift loss to 0.005% of circulating flow (less than 10 L/h for the ZL-15T).
The ZL-15T's axial fan delivers 140 CMM of airflow at design conditions, driven by a 0.37 kW motor at 380V 3-phase 50 Hz. The 635mm propeller diameter is sized to move 140 CMM against the 13 kPa external static pressure of the fill media and drift eliminators. Fan tip speed is kept below 60 m/s to minimize noise (the ZL-15T operates at 60-65 dB(A) at 5 meters) and to extend bearing life beyond 50,000 hours. Direct-drive configuration eliminates belt maintenance and slip-related performance degradation. For variable-speed applications, a VFD can reduce airflow to 50% of design during cool-weather operation, cutting fan power consumption by 80% and providing substantial energy savings over the cooling season.
The ZL-15T's 13 kPa head loss at design flow (11.7 m3/h) is the external static pressure that the chilled water pump must overcome, in addition to the chiller evaporator and piping losses. For a typical HVAC installation with 50 meters of equivalent piping and a chiller with 40 kPa evaporator pressure drop, total system head requirement is approximately 100 kPa. The ZL-15T's 13 kPa contribution is moderate, allowing standard end-suction pumps at 50 Hz operation. Variable-speed pump operation can save 30-50% pumping energy by throttling flow during low-load periods. The head loss curve is relatively flat across 50-110% of design flow, providing flexibility in pump selection without sacrificing cooling tower performance.
The ZL-15T shell is constructed from fiberglass-reinforced polyester (FRP) with UV-stabilized gelcoat surface, providing 15-20 year service life in outdoor environments. Dry weight of 54 kg and operating weight of 290 kg (when filled with water) require a flat concrete pad capable of supporting 340 kg per square meter. The ABS fan is corrosion-resistant and balanced to ISO 1940 G6.3 standard. All metal fasteners are stainless steel 316 for marine environment compatibility. Compared to galvanized steel towers, FRP requires no recoating, no rust repair, and maintains thermal performance throughout its service life. The ZL-15T's FRP construction is CE certified for European installations and IP55 rated for the electrical motor enclosure.
The ZL-15T (15 ton FRP counter flow cooling tower) is one of 110 ZILLION cooling tower configurations covering 10 buyer perspectives across 11 cooling capacities. The following cross-references help engineer technical buyers compare related configurations and access supporting engineering resources:
The ZL-15T cooling tower is engineered in accordance with industry-recognized standards. The following authoritative sources establish the technical baseline for engineer technical applications:
A plastics manufacturer in Vietnam operating a 15-ton injection molding cell deployed the ZL-15T alongside a heat flow meter to verify real-world heat duty against nameplate specifications. Over 90 days of continuous operation, the ZL-15T delivered 52.8 kW of heat rejection at design wet-bulb 27°C, with leaving water holding 31.5°C to 32.8°C through diurnal WB swings of 22°C to 30°C. The tower maintained 5°C approach within design tolerance for 87% of operating hours. Field verification confirmed the CTI Standard 201 thermal performance rating within ±3% tolerance.
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This page covers the essential information engineer technical buyers need when evaluating the ZL-CT series for their application. The following key takeaways summarize the most critical specifications, performance metrics, and engineering considerations:
The following questions address the most common inquiries from engineer technical buyers evaluating the ZL-CT series (15 ton FRP counter flow cooling tower) for their application. Each answer references the technical specifications, performance metrics, and compliance documentation applicable to this configuration:
The ZL-15T achieves a 5°C wet-bulb approach at design WB 27°C, meaning the tower leaves water at 32°C when ambient wet-bulb is 27°C. At WB 30°C, leaving water climbs to 35°C; at WB 24°C, leaving water drops to 29°C. This 5°C approach is the design point per CTI Standard 201.
FRP (Fiberglass Reinforced Plastic) with isophthalic polyester resin tolerates pH 6.5-9.0 circulating water with <0.1mm surface erosion over 15 years. Compared to galvanized steel shells (typically 5-8 years), FRP provides 2-3x longer service life in similar water chemistry.
The 0.37-3.0 kW fan motors used across the ZL-CT series are rated for 50,000 hour bearing life at continuous duty, equivalent to 7-8 years at 16 hours/day operation. MTBF is confirmed within NEMA MG-1 specification tolerance.
ZL-15T thermal performance is certified per CTI Standard 201 (ATC-105) acceptance test code. Independent third-party testing confirms heat duty within ±3% tolerance of nameplate rating at design conditions.
Head loss at design flow is 13-18 kPa depending on model size, with pressure drop proportional to flow squared (h = k × Q²). The condenser water pump should be sized to deliver at least 15-20 kPa head at design flow to accommodate tower loss plus piping losses.
Counter-flow geometry delivers 65-70% LMTD effectiveness versus 50-55% for cross-flow equivalent towers. Counter-flow packs heat transfer area into a vertical column rather than spreading it horizontally, resulting in 20-25% smaller footprint and <1°C air bypass loss in well-sealed designs.
The ZL-15T cooling tower is also designed in accordance with the following additional industry standards that complement the core technical baseline:
Quick Specs: ZL-CT40 industrial round cooling tower with 40-ton cooling capacity, FRP material, counter-flow design, 1.5kW fan, CE certified. Best for industrial chiller systems and mid-scale manufacturing. The water cooling tower is a device used for cooling circulating water. By exchanging heat between hot water and air, the water temperature is reduced, thus realizing the repeated use of circulating water. Water cooling towers are widely used in industrial production, air conditioning systems and other fields, and are of great significance for saving water resources and reducing energy consumption.
Quick Specs: ZL-CT60 round shape water cooling tower with 60-ton capacity, counter-flow design, FRP material, 1.5kW fan, CE certified. Best for industrial chiller systems and large-scale cooling. A water cooling tower is a device used for cooling industrial water or other liquids. Its main function is to cool down hot water through heat exchange between hot water and air so that the cooled water can be recycled.
Quick Specs: ZL-CT100 FRP round cooling tower with 100-ton cooling capacity, FRP material, 2.2kW fan, CE certified. Best for large-scale industrial cooling and high-capacity chiller systems. The counterflow cooling tower is a common type of cooling tower. It sprays hot water from top to bottom and air flows from bottom to top, enabling hot water and air to exchange heat in the packing, thereby reducing the water temperature. The counterflow cooling tower has the advantages of high cooling efficiency, compact structure and small floor area, and is widely used in industrial production, air conditioning and refrigeration and other fields.
Quick Specs: ZL-CT square drop counter-flow cooling tower with FRP material, multiple capacity options, CE certified. Best for high-temperature industrial water cooling and open cooling tower applications. The square cooling tower has the advantages of small floor area, beautiful appearance, and convenient installation. It is widely used in fields such as air conditioning and refrigeration and industrial cooling, providing effective cooling guarantee for the normal operation of various equipments.
Quick Specs: ZL-CT factory-direct industrial cooling tower with multiple types and capacities, high-efficiency design, CE certified. Best for industrial cooling applications and large-scale manufacturing. A cooling tower dissipates heat from industrial or air - conditioning systems. Its working principle involves spraying hot water onto packing to form a water film, while air flow carries away heat from the water to lower its temperature. The cooled water is recyclable, saving water resources and reducing costs. There are various types, such as open and closed cooling towers. Open ones contact outside air directly, making water prone to contamination but with lower costs. Closed ones have water circulating in sealed pipes, ensuring cleaner water but usually at a higher price. Cooling towers play a key role in fields like power plants, chemical plants, and data centers, helping maintain system operation and improve energy utilization efficiency.
The ZL-10T 10 Ton Industrial FRP counter flow cooling tower delivers 35.2 kW heat rejection at 27C wet-bulb and 32C leaving water, designed for CFO buyers evaluating cooling tower procurement for capital projects. ZILLION engineered this 10-ton FRP counter flow cooling tower with ISO 9001:2015 quality construction for long service life. The smooth FRP shell resists algae and biofilm buildup, while the aluminum alloy fan blade is fully enclosed for operator safety. Specifications include 7.81 m3/h circulation flow, 0.37 kW fan motor, 5C cooling range, and 5C approach to wet-bulb. Pricing starts at USD 1050 EXW Dongguan, with volume discounts available. MOQ 1 unit, lead time 7-15 days for cfo procurement buyers.
The ZL-10T 10 Ton Industrial FRP counter flow cooling tower delivers 35.2 kW heat rejection at 27C wet-bulb and 32C leaving water, designed for maintenance technicians with low servicing needs and easy-access components. ZILLION engineered this 10-ton FRP counter flow cooling tower with ISO 9001:2015 quality construction for long service life. The smooth FRP shell resists algae and biofilm buildup, while the aluminum alloy fan blade is fully enclosed for operator safety. Specifications include 7.81 m3/h circulation flow, 0.37 kW fan motor, 5C cooling range, and 5C approach to wet-bulb. Pricing starts at USD 1050 EXW Dongguan, with volume discounts available. MOQ 1 unit, lead time 7-15 days for maintenance technician buyers.
The ZL-10T 10 Ton Industrial FRP counter flow cooling tower delivers 35.2 kW heat rejection at 27C wet-bulb and 32C leaving water, engineered for HVAC EPC contractor projects requiring turnkey cooling tower delivery with installation support. ZILLION engineered this 10-ton FRP counter flow cooling tower with ISO 9001:2015 quality construction for long service life. The smooth FRP shell resists algae and biofilm buildup, while the aluminum alloy fan blade is fully enclosed for operator safety. Specifications include 7.81 m3/h circulation flow, 0.37 kW fan motor, 5C cooling range, and 5C approach to wet-bulb. Pricing starts at USD 1050 EXW Dongguan, with volume discounts available. MOQ 1 unit, lead time 7-15 days for HVAC EPC contractor buyers.
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