Open Cooling Towers - assetinvest.com7912.pdf · RCT-2000 cooling tower provides solutions to these...

RCT - B 57

RCT
Open Cooling Towers
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ooling Towers

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Product DetailRCT Open Cooling Tower ...................................................................... B58

Benefits ..................................................................................................... B60

Construction Details ................................................................................ B64

Custom Features and Options ................................................................ B66

Accessories ............................................................................................... B67

Engineering Data ..................................................................................... B68

Structural Support .................................................................................. B72

Engineering Specifications ..................................................................... B75

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RCT Open Cooling TowerCapacitySingle Cell Capacity:
40 – 145 l/s

General DiscriptionCommercial applications demand reliable, cost effective and energy efficient solutions. With an ever increasing focus on operational reliability and ease of maintenance. It is paramount that cooling equipment be also easy to inspect, clean & maintain. The RCT-2000 cooling tower responds to all these requirements thanks to built-in design features.

Industrial applications face unique challenges in their processes with varying site conditions The RCT-2000 cooling tower provides solutions to these challenges by reducing the cost of plant design, construction, operation and on-going maintenance, whilst improving the standard of quality and construction, required by medium to heavy industry.

Key FeaturesTotal Lower Installation Costs

Low Noise

Low Height

Superior Pultruded Composite Construction

Superior Maintenance and Cleaning Possibilities

Baltimore Aircoil

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... because temperature matters

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Benefits
Total Lower Installation Costs

Single or multiplexed configurations, common or segmented basins, partitioned or extended air inlets and increased capacity control steps, all are but a few examples of the flexible modular cooling tower design.

The tower can be shipped directly from the factory as a fully assembled unit, as unit modules or knocked down, to suit diverse and often restricted on-site conditions.

The low shipping weights and modular shipping options reduce transport and crane costs. Lifting lugs, provided as standard, offer secure fixing points for safe crane lifts. Lower installation costs are achieved due to flanged inlet-outlet connections, solvent welded drain connections and threaded make-up, overflow and quick-fill connections.

Low NoiseThe use of high efficiency axial fans as standard, a smooth faced streamlined air entry fan cylinder and a minimum tip clearance, all translate into a low air inlet velocity which in turn ensures noise levels are minimised. Varying fan powers can also be achieved within a nominal tower size.

Modular Design Factory Assembled

Total Lower Installation Cost

Low Noise Axial Fan

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Low HeightThe tower has been designed as a low height counter-flow cooling tower able to accommodate height sensitive sites, reduce pump head and provide easy access to all of its components.

Superior Pultruded Composite ConstructionThe use of high strength Pultruded Composite components for the primary structure combined with BAC's patented "Bonded Panel to Post Connection", offers many advantages over conventional hand laid or chopped strand fibreglass construction methods. Pultruded composites possess a superior strength to weight ratio of up to five times that of chopped strand fibreglass.

Superior Maintenance and Cleaning PossibilitiesAccess to complete unit interior - The large access panel is fitted with easily removable knobs. Removing the access panel does not require any tools or dismantling of the tower structure, providing unequalled access to all of the internal cooling tower components for inspection, cleaning and maintenance.

Basin Accessible from all Sides - Removal of the louvers, requiring no tools, provides access to all sides of the smooth faced cold water basin for inspection, cleaning and maintenance.

Low Height Strenght Pultruded Composite

Large Access Door Easy Access to Basin


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Easy Access to Float Valve - Access to and adjustment of the float valve is simplified. The stainless steel suction strainer can easily be inspected, removed and cleaned inside.
Removable Fill - The fill medium can easily be removed for cleaning thanks in part to the ample accessibility, gained by removal of the access panel, and to the easy to handle removable fill blocks.

Removable Spray System - Cleaning and inspection of the spray system can be performed insitu or by removing the spray branch arms. No tools are required for the removal of the branch arms or the individual water distribution nozzles.

Removable Eliminators - Removal of high efficiency drift eliminators can be accomplished easily without the removal of other internal components or by having to dismantle the tower structure. The eliminators rest on supports specifically designed to this purpose.

Easy Access to Float Valve Removable Fill

Removable Spray system Removable Eliminators

Baltimore Aircoil

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Motor Outside Airstream - Units larger than model 2142 include an adjustable motor base plate for belt tensioning, extended lubrication lines with externally mounted grease nipples are provided, as standard to ease of scheduled maintenance. Smaller units are supplied as direct drive units.

Easy Access to Drives - Removal of the fan screen for access to belts and drives is not required. These drive components are easily accessible through the specially designed hinged belt guard for inspection adjustment or replacement purposes.

Motor Outside Airstream Easy Access to Drives


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Construction Details
1. FanAluminium Axial Fans

Small tip clearance tolerance

Low air inlet velocity

Minimum Noise

2. Drive TrainEasy access to drives and belts for inspection and adjustment.

Stainless steel shaft.

Corrosion resistant cast aluminium sheaves

Heavy-duty bearings

3. MotorModels RCT-2118 and 2129 utilise direct drive motor.

Larger units have the fan motor outside of the moist discharge air stream and use belt drives.

Belts provide reliability and long service life with low maintenance requirements

Baltimore Aircoil

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4. Drift EliminatorsUV resistant non-corrosive material, impervious to rot, decay and biological attack

Three distinct changes in air direction to reduce drift loss significantly

Assembled in easy to handle sections, which can be removed for access to the equipment interior

5. Access DoorThe larger access door is easily removable to provide complete access to drift eliminators, spray system and fill

Larger units are equipped with anchor points to secure door when removed

6. FillThe fill is impervious to rot, decay and resistant to fungus or biological attacks

It consists of high efficiency cross-fluted sheets, solvent welded into lightweight blocks

Blocks are sized for easy handling and removal for cleaning.

7. Water Distribution SystemLow pressure, stationery type nozzles

Heavy duty PVC spray branches are grommeted to facilitate removal and cleaning

8. Cold Water BasinThe cold water basin is made of fibreglass reinforced polyester (FRP) and extra reinforced in critical areas.

Sloped basin sides with smooth internal finish for easy cleaning.

9. StrainerStainless steel construction, anti-vortex design.

10. Make-up AssemblyAdjustable water make-up assembly, over flow and quick fill connections are supplied standard.

11. ConnectionsFlanged inlet- and outlet connectionsThreaded make-up-, over flow- and quick fill connections

12. LouversRemoval of the louvers provides access to all sides of the cold water basin for inspection, cleaning and maintenance.

13. RoofdeckSmooth faced air entry fan cylinders

Close manufacturing tolerances allow small tip clearance providing an increased efficiency.


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Custom Features and OptionsConstruction OptionsStandard construction: High strenght pultruded composite components for the primary structure combined with patented bonded panel to post connection.
Fan Drive SystemHigh efficiency fans with direct drive motors for models RCT-2118 and RCT-2129.Larger models are belt driven. All belt driven units have extended lubrication lines to the edge of the fan cylinder.The mechanical equipment support and fan guard are made of hot dip galvanised steel.

Optional: Mechanical equipment support assembly in SST 304.

Cold Water BasinThe RCT tower cold water basin is constructed of high performance fibreglass reinforced polyester. The suction connection is flanged.

Optional: Units can be supplied without cold water basin for field assembly on a concrete tank. A unit supplied without cold water basin excludes basin, louvers, legs, strainer, suction drain and make-up assembly.Triple fan units are always supplied without cold water basin.

Factory AssembledThe RCT Tower is completely factory-assembled.

Optional: The tower can be shipped in knocked-down version for assembly on site. This enables overseas transport in containers and significantly reduces transport cost.

Heat Transfer Surface AlternativesStandard Heat Transfer Surface: The film-type heat transfer surface supplied as standard with the cooling towers has been carefully selected for industrial applications. The 19 mm spacing between the surface sheets gives excellent air/water contact with low air pressure loss. The standard heat transfer surface provides high thermal efficiency and is sufficient to avoid clogging in most environments.Optional Film-Type Space 12 mm: For applications where the cooling tower water is clean, alternative models with 12 mm fill are available.Heavy Duty 26 mm Fill Type: Heavier contamination, which results in a heavy accumulation on the heat transfer surface, requires a higher structural strength than can be accomplished with film-type. For such situations, a heat transfer surface is available, constructed of heavy-duty wave formed FRP panels spaced 26 mm apart. With the unique integrated telescopic fill supports, the FRP fill panels can easily be removed for cleaning.

Telescopic fill supports (only for heavy duty 26 mm Fill Type)

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AccessoriesTwo-Speed Fan MotorAn effective method of adding steps of capacity control and saving energy is the installation of two-speed fan motors in lieu of the standard single-speed motors. Two-speed motors are ideally suited for this purpose. At half fan speed the equipment capacity is still about 60% of design whereas the drawn fan power is only about 20% of the full speed motor power. In addition, at low speed, sound levels will generally reduce by about 9 dB(A).

Electric Water Level Control PackageThe electric water level control replaces the standard mechanical make-up valve when a more precise water level control is required. This package consists of a float switch mounted in the basin and a solenoid activated valve in the make-up water line. The valve is slow closing to minimize water hammer.

Vibration Cut-out SwitchA factory-mounted vibration cut-out switch is available to effectively protect against equipment failure due to excessive vibration of the mechanical equipment system. BAC can provide a vibration cut-out switch in an IP65 enclosure to ensure reliable protection.

Basin HeatersUnits exposed to below freezing ambient temperatures require protection to prevent freezing of the water in the cold water basin when the unit is idle. Factory-installed heaters, which maintain the water temperature at 4°C, are a simple and inexpensive way of providing such protection. The heater package includes the heaters, a thermostat and a low level cut out switch to protect the heaters if the water level is too low. Standard electric heaters are selected for -18°C ambient temperature.

Equalising ConnectionWhenever cooling towers are installed to operate in parallel, the water level in the basins should be equalised by means of an equalising connection. The equalising connection can be either a whole pattern cut out only or a connection to the basin.

Basin Sweeper PipingBasin sweeper piping provides an effective method of preventing sediment from collecting in the cold water basin of the unit. A complete piping system, including nozzles, is provided in the unit basin for connection to side stream filtration equipment (Refer to section "Technical Resources, Filtration").

Model No.RCT

Heater -18°C(kW)

Single Fan Units Double Fan Units

RCT-2118 / RCT 2129 1 x 5 2 x 5

RCT-2142 / RCT-2156 1 x 6 2 x 6

RCT-2183 / RCT-2208 1 x 6 2 x 6

RCT-2238 / RCT2262 2 x 4 4 x 4

RCT-2299 / RCT-2320 2 x 5 4 x 5

RCT-2368 / RCT-2386 2 x 6 N.A.

RCT-2418 / RCT-2441 2 x 6 N.A.


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Engineering DataSingle Fan Units - Square Box Sizes
Remarks:

1. Access door is always opposite to inlet connection end.

2. Alternative inlet/outlet and tower configurations are available.

3. Nominal outlet connection size provided.

4. Actual outlet sized to match flow.

5. Models RCT-2118-1 and RCT-2129-1 have direct drive motors.

Model W L HShipping Weight

(kg)

Operating Weight

(kg)

Fan Motor(kW)

Air Flow(m³/s)

Fan(mm)

InletND

(mm)

OutletND

(mm)

DrainND

(mm)

OverflowND

(mm)

MakeupND

(mm)

Quick-fillND

(mm)

RCT-2118-1 2284 2284 3252 1000 2675 5,5 15,4 1524 150 150 50 50 20 20

RCT-2129-1 2284 2284 3252 1000 2675 7,5 17,3 1524 150 150 50 50 20 20

RCT-2142-1 2589 2589 3326 1250 3375 5,5 18,5 1829 150 150 50 80 20 20

RCT-2156-1 2589 2589 3326 1250 3375 7,5 20,4 1829 150 150 50 80 20 20

RCT-2183-1 2894 2894 3413 1550 4125 7,5 23,9 2134 200 200 50 80 20 20

RCT-2208-1 2894 2894 3413 1550 4125 11 27,2 2134 200 200 50 80 20 20

RCT-2238-1 3198 3198 3646 1800 4850 11 31,2 2134 200 200 50 80 40 40

RCT-2262-1 3198 3198 3646 1800 4850 15 34,2 2134 200 200 50 80 40 40

RCT-2299-1 3499 3499 3810 2100 5700 15 39,0 2438 200 250 50 80 40 40

RCT-2320-1 3499 3499 3810 2100 5700 18,5 41,8 2438 200 250 50 80 40 40

1. Water Inlet; 2. Water Outlet; 3. Drain; 4. Overflow; 5. Make-Up; 6. Quick Fill; 7. Fan Motor.

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Single Fan Units - Rectangular Box Sizes

Remarks:






(kg)

Operating Weight

(kg)

Fan Motor(kW)

Air Flow(m³/s)

Fan(mm)

InletND

(mm)

OutletND

(mm)

DrainND

(mm)

OverflowND

(mm)

MakeupND

(mm)

Quick-fillND

(mm)

RCT-2368-1 3198 4787 4228 2700 7300 18,5 47,8 2134 200 200 50 80 40 40

RCT-2386-1 3198 4787 4228 2700 7300 22 50,2 2134 200 200 50 80 40 40

RCT-2418-1 3500 5247 4428 3000 8500 18,5 54,3 2438 200 250 50 80 40 40

RCT-2441-1 3500 5247 4428 3000 8500 22 57,3 2438 200 250 50 80 40 40



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Double Fan Units
Remarks:





5. Models RCT-2118-2 and RCT-2129-2 have direct drive motors.


(kg)

Operating Weight

(kg)

Fan Motor(kW)

Air Flow(m³/s)

Fan(mm)

InletND

(mm)

OutletND

(mm)

DrainND

(mm)

OverflowND

(mm)

MakeupND

(mm)

Quick-fillND

(mm)

RCT-2118-2 4551 2284 3385 2 x 5,5 30,8 2 x 5,5 30,8 2 x 1524 2 x 150 200 50 50 40 40

RCT-2129-2 4551 2284 3385 2 x 7,5 34,6 2 x 7,5 34,6 2 x 1524 2 x 150 200 50 50 40 40

RCT-2142-2 5160 2589 3479 2 x 5,5 37,1 2 x 5,5 37,1 2 x 1829 2 x 150 250 50 80 40 40

RCT-2156-2 5160 2589 3479 2 x 7,5 40,8 2 x 7,5 40,8 2 x 1829 2 x 150 250 50 80 40 40

RCT-2183-2 5770 5894 3585 2 x 7,5 47,8 2 x 7,5 47,8 2 x 2134 2 x 200 250 50 80 40 40

RCT-2208-2 5770 2894 3585 2 x 11 54,4 2 x 11 54,4 2 x 2134 2 x 200 250 50 80 40 40

RCT-2238-2 6379 3198 3836 2 x 11 62,4 2 x 11 62,4 2 x 2134 2 x 200 250 50 80 40 40

RCT-2262-2 6379 3198 3836 2 x 15 68,4 2 x 15 68,4 2 x 2134 2 x 200 250 50 80 40 40

RCT-2299-2 6985 3499 4019 2 x 15 78,1 2 x 15 78,1 2 x 2438 2 x 200 250 50 80 40 40

RCT-2320-2 6985 3499 4019 2 x 18,5 83,5 2 x 18,5 83,5 2 x 2438 2 x 200 250 50 80 40 40


Baltimore Aircoil

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Triple Fan Units

Remarks:


2. Alternative water inlet and tower configurations are available.

3. Triple fan units are not available with common FRP Basin. Only forinstallation on concrete basin.

Model W L H Shipping Weight(kg)

Operating Weight

(kg)Fan Motor

(kW)Air Flow

(m³/s)Fan

(mm)InletND

(mm)

RCT-2118-3 6817 2284 3452 3000 8025 3 x 5,5 46,2 3 x 1524 3 x 150

RCT-2129-3 6817 2284 3452 3000 8025 3 x 7,5 52 3 x 1524 3 x 150

RCT-2142-3 7732 2589 3555 3750 10125 3 x 5,5 55,6 3 x 1829 3 x 150

RCT-2156-3 7732 2589 3555 3750 10125 3 x 7,5 61,2 3 x 1829 3 x 150

RCT-2183-3 8646 2894 3671 4650 12375 3 x 7,5 71,6 3 x 2134 3 x 200

RCT-2208-3 8646 2894 3671 4650 12375 3 x 11 81,6 3 x 2134 3 x 200

RCT-2238-3 9560 3198 3931 5400 14550 3 x 11 93,6 3 x 2134 3 x 200

RCT-2262-3 9560 3198 3931 5400 14550 3 x 15 102,6 3 x 2134 3 x 200

RCT-2299-3 10471 3499 4124 6300 17100 3 x 15 117,1 3 x 2438 3 x 200

RCT-2320-3 10471 3499 4124 6300 17100 3 x 18,5 125,3 3 x 2438 3 x 200

1. Water Inlet; 2. Fan Motor; 3. Concrete Basin (by others).


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Structural SupportThe recommended support arrangement for units consists of parallel I-beams running the full length of the unit, spaced as shown in the following drawing. Besides providing adequate support, the steel also serves to raise the unit above any solid foundation to ensure access to the bottom of the unit. To support units in an alternate steel support arrangement, consult your BAC Balticare Representative.
Single Fan - Square Box Sizes

Single Fan - Rectangular Box Sizes

1. Outline of Unit; 2. Mounting holes; 3. FRP Cold Water Basin; 4. Water Inlet Side.


Baltimore Aircoil

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N/A = Not Applicable

Double Fan Units

N/A = Not Applicable

RCT-2000Nominal Box Size

MINIMUM SUPPORT REQUIREMENTS

DIMENSIONS (mm) PIER DESIGN LOADS (kg)

A B C D E F G H J K L M N P Q R S T U V W

7’ x 7’ 2260 1130 N/A 200 150 100 130 70 N/A 410 540 210 N/A N/A

8’ x 8’ 2560 1280 N/A 200 150 100 130 70 N/A 510 680 340 N/A N/A

9’ x 9’ 2865 1435 N/A 200 150 100 130 70 N/A 620 830 420 N/A N/A

10’ x 10’ 3170 1585 N/A 200 150 100 130 70 N/A 730 970 490 N/A N/A

11’ x 11’ 3475 1740 N/A 200 150 100 130 70 N/A 860 1140 570 N/A N/A

10’ x 15’ 3170 1585 1485 1695 1185 1085 1295 200 150 100 130 70 400 N/A 730 980 490 N/A N/A

11’ x 16,5’ 3475 1740 1640 1850 1290 1140 1400 200 150 100 130 70 400 N/A 860 1140 570 N/A N/A






14’ x 7’ 2260 1130 1135 N/A 200 150 100 130 70 N/A 205 150 410 540 210 N/A

16’ x 8’ 2560 1280 1285 N/A 200 150 100 130 70 N/A 205 150 510 680 340 N/A

18’ x 9’ 2865 1435 1435 N/A 200 150 100 130 70 N/A 205 150 620 830 420 N/A

20’ x 10’ 3170 1585 1590 N/A 200 150 100 130 70 N/A 205 150 730 970 490 N/A

22’ x 11’ 3475 1740 1740 N/A 200 150 100 130 70 N/A 205 150 860 1140 570 N/A


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Triple Fan Units - Concrete Sump
N/A = Not applicable

REMARK: Do not use for construction. Refer to factory certified dimensions & weights. This brochure includes datacurrent at time of publication, which should be reconfirmed at the time of purchase. In the interest of productimprovement, specifications, weights and dimensions are subject to change without notice. Up-to-date engineeringdata and more can be found at www.BaltimoreAircoil.com.





21’ x 7’ 2260 1130 1135 N/A 200 150 100 130 70 N/A 205 150 410 540 210 N/A

24’ x 8’ 2560 1280 1285 N/A 200 150 100 130 70 N/A 205 150 510 680 340 N/A

27’ x 9’ 2865 1435 1435 N/A 200 150 100 130 70 N/A 205 150 620 830 420 N/A

30’ x 10’ 3170 1585 1590 N/A 200 150 100 130 70 N/A 205 150 730 970 490 N/A

33’ x 11’ 3475 1735 1740 N/A 200 150 100 130 70 N/A 205 150 860 1140 570 N/A

1. Outline of Unit; 2. Water Inlet Side.

Baltimore Aircoil

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Engineering Specifications1.0 Cooling Tower1.1 General: Supply and install factory assembled cooling tower of counter-flow, induced draft, axial fan design. Each cooling tower shall be guaranteed by the manufacturer to cool ___ litres per second of

water from ___ °C (HW) entering water temperature to ___ °C (CW) leaving water temperature at ___ °C (WB) entering wet bulb temperature.

2.0 Construction Details2.1 Structure: The cooling tower structure and casing shall be constructed of high strength Pultruded Composite materials. All pultruded composite components shall be moulded to exacting standards with UV resistant polyester resins such that UV protection is afforded throughout the entire embodiment of the components as well as being an externally applied coating.

2.2. Internal Surfaces: All internal surfaces of the casing, basin, roof deck and fan cylinder shall have an even and regular smooth faced finish resulting from either an open moulding or pultruded moulding process where the faces of these components come into direct contact with the mould to facilitate easy cleaning. Internal flow coated surfaces that have not come in contact with the mould shall not be acceptable.

2.3 Cold Water Basin: The basin shall be constructed of high performance Fibreglass Reinforced Polyester (FRP) and reinforced in critical areas. The basin shall have a smooth internal finish and slope to a center drain for ease of cleaning. All suction, drain, overflow and quick fill connections shall be furnished as standard. The suction connection shall be flanged. Easy and complete access shall be made possible from all sides.

2.4 Air Inlet Louvers: Air Inlet Louvers shall be plastic material, designed to prevent splash out and minimise the passage of sunlight to the cooling tower interior. Louvers shall be easily removable lightweight sections providing easy access for cleaning.

304-grade stainless steel deflector shall be factory fitted at the bottom of and inside the louvers to direct water away from the louver, preventing splash out.

2.5 Access: One full side of the casing shall be removable to provide full and open access to all internal tower components for inspection, maintenance and cleaning. The access panel shall be retained by easily removable knobs, not requiring dismantling of the tower structure.

2.6 Wet Deck Surface: The film type fill shall be impervious to rot, decay and fungus or biological attacks. It shall consist of high efficiency cross-fluted sheets solvent welded into lightweight blocks sized for easy handling and removal for cleaning.

2.7 Water Distribution System: Water shall be distributed evenly over the wet deck surface by a low pressure, stationery, non rotating type water distribution system incorporating heavy duty PVC spray branches and plastic spray nozzles held into place with snap rubber grommets.

2.8 Drift Eliminators: The plastic drift eliminators shall be UV resistant and impervious to rot, decay and fungus or biological attacks. They shall consist of high efficiency three pass wave formed blades solvent welded into lightweight, easily removable sections.

2.9 Strainer: The cold water basin strainer shall be a 304-grade stainless steel cylindrical type having a solid top cover plate with a perforated mesh bottom of sufficient open area relative to the suction flow rate and by design, prevent vortexing at the outlet.

2.10 Hardware: All wetted hardware, fill, eliminator, water distribution supports and miscellaneous metal components shall be 304-grade stainless steel.

3.0 Mechanical Equipment3.1 Fan: The adjustable pitch axial flow fan(s) shall be of low noise, multi-bladed type heavy duty extruded aluminium. The fan shall operate within a FRP fan cylinder having an even and regular smooth faced internal finish ensuring a streamlined air entry and minimum tip clearance for maximum fan efficiency.

3.2 Motor: The fan motor(s) shall be to IP55 standard with Class F insulation specifically designed for cooling tower service. The fan motor shall be fully outside of the moist discharge air stream for belt driven units. The motor shall be located adjacent to the fan cylinder for ease of access for maintenance and increased motor life expectancy. The motor is to be located below the top of the cooling tower ensuring overall tower height is kept to a minimum and external of discharge ducting in such applications.

3.3 Mechanical Support: The mechanical support shall be of HDG steel construction. The entire mechanical arrangement shall simply bolt to the top of the fan cylinder for ease of access for maintenance. The fan shaft shall be of 304 stainless steel supported by heavy duty, self aligning, grease packed ball bearings specifically suited to vertical shaft application with moisture proof seals and integral slingers. Extended lubrication lines shall be provided as standard to the bearings with grease nipples located outside for ease of scheduled maintenance.

3.4 Belt Drive: Units with belt drive shall be via standard "B" section V belts for ease of availability. The motor pulley shall be located outside of the discharge air stream. The entire drive arrangement is to be protected by a hinged cover guard in HDG.


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Baltimore Aircoil

Baltimore Aircoil has developed a network of highly qualified sales representatives backed up by an experienced

technical staff who will work hand-in-hand with you to ensure that each of your projects is a success.

If you need help deciding which product to use, you can count on the support of your local BAC Balticare

representative to develop solutions that meet your requirements.

You can find BAC contact details on the web www.BaltimoreAircoil.com

or

You can send a request to [email protected]

Open Cooling Towers - assetinvest.com7912.pdf · RCT-2000 cooling tower provides solutions to these...

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