Water Blocks Liquid Heat Exchangers : CustomThermoelectric.com

Water Blocks ( Liquid Heat Exchangers )

Water blocks are the most efficient method of heat removal. They are often 4-5 times more efficient compared to a standard heat sink and fan.

The principle is simple: you provide a source of cool liquid (typically water) to the inlet of the water block. The liquid travels back and forth through the various chambers of the water block thereby absorbing the heat. The warmer liquid then exits the water Block.

The source of the liquid can be;

Building (tap) water - This water is usually cooler than the ambient air temperature. The warmer exiting water can be sent to a drain or re-used in a number of ways.
Chiller Liquid - A pre-chilled Liquid (typically alchohol) from a recirculating chiller passes through the water block and then is returned to the chiller for re-cooling. This source typically is a closed loop sytem.
Well water, lake, or stream water - This water usually requires pre-filtering but can be substantially colder than ambient air temperature, especially during winter months. Exiting water can either be returned to the source or re-used.
Radiator closed loop - a liquid (water, propylene glycol, or a mix of both) enters the water block at approximately ambient air temperatures. The exiting liquid then goes to a fan cooled radiator of sufficient size to cool the liquid back down to ambient air temperature. The liquid is then sent back through the water block, This is a closed loop system.

Be sure to look at "How to get the most out of a water block"

Available to purchase in our online STORE.

Call 443-926-9135 if you need larger quantities.

Water Blocks or waterblocks Liquid Heat Exchangers

Water Blocks

(waterblocks)

(Liquid Heat Exchanger)

Water Blocks Liquid Heat Exchangers

Part #

Spec Sheets

Description

Weight

Price

WBA-1.62-0.55-CU-01

Water Block Liquid Heat Exchanger dimensioned drawing

Thermal Resistance Graph

All copper water block Liquid exchanger to rapidly remove heat from the hot side of peltier TECs or TEGs. Most efficient method of removing heat from a thermoelectric TEC or TEG.

TECs and TEGs can be mounted to both sides thereby allowing heat removal from two 40x40mm TECs at the same time.

Measures: 1.62 x 1.62 x 0.55 inches

Inlet and Outlet on the same side.

Usable flat area of 1.62 x 1.62 inches (41 x 41 mm) per side

Inlet & outlet tapped 1/16" NPT: Comes with 2 pieces Nylon barbed tube fittings for 3/16" ID tubing.

Will accomodate per side;

Single TECs or TEGs up to 40 x 40mm

2, 3, or 4 TECs up to 20 x 20mm

CNC Machined from a solid billet of copper. Brazed together to a 100 psi rated watertight seal.

Minimum flow rate: 0.1 gph. Maximum flow rate: 2.5 gph.

Water flow rate GPM	Thermal Resistance °C/watt
0.2	0.044
0.4	0.033
0.6	0.029
0.8	0.025
1.0	0.023

155 grams

0.34 lbs

WBA-3.0-0.85-AL-01

Water Block Liquid Heat Exchanger

Liquid exchanger to rapidly remove heat from the hot side of TECs or TEGs. Most efficient method of removing heat from a TEC or TEG.

Measures: 3.0 x 3.0 x 0.85 inches

Inlet and Outlet on the same side.

Usable flat area of 2.56 x 2.56 inches (65 x 65 mm)

8 mounting holes tapped for 6-32 screws

Inlet & outlet tapped 1/4" NPT: Comes with 2 pieces brass 1/2" ID hose barb fittings.

Will accomodate;

Single peltier TECs or TEGs up to 65 x 65mm

2, 3, or 4 TECs or TEGs up to 30 x 30mm

CNC Machined from a solid billet of aluminum with an O-ring seal. Internal flow path is easily serviceable by removing 4 screws and cover.

285 grams

0.63 lbs

WBA-3.0-0.85-AL-R2

Water Block Liquid Heat Exchanger

Liquid exchanger to rapidly remove heat from the hot side of TECs or TEGs. Most efficient method of removing heat from a TEC or TEG.

Measures: 3.0 x 3.0 x 0.85 inches

Inlet and Outlet on opposite sides.

Usable flat area of 2.56 x 2.56 inches (65 x 65 mm)

8 mounting holes tapped for 6-32 screws

Inlet & outlet tapped 1/4" NPT: Comes with 2 pieces brass 1/2" ID hose barb fittings.

Will accomodate;

Single thermoelectric TECs or TEGs up to 65 x 65mm

2, 3, or 4 TECs or TEGs up to 30 x 30mm

CNC Machined from a solid billet of aluminum with an O-ring seal. Internal flow path is easily serviceable by removing 4 screws and cover.

288 grams

0.64 lbs

WBA-4.0-0.92-AL-01

Water Block Liquid Heat Exchanger

Liquid exchanger to rapidly remove heat from the hot side of TECs or TEGs. Most efficient method of removing heat from a peltier cooler TEC or TEG.

Measures: 4.0 x 4.0 x 0.92 inches

Inlet and Outlet on opposite sides.

Usable flat area of 3.54 x 3.54 inches (90 x 90 mm)

10 mounting holes tapped for 6-32 screws

Inlet & outlet tapped 1/4" NPT: Comes with 2 pieces brass 1/2" ID hose barb fittings.

Will accomodate;

Single TECs or TEGs up to 90 x 90mm

2, 3, or 4 TECs or TEGs up to 40 x 40mm

2 to 8 TECs or TEGs up to 30 x 30mm

CNC Machined from a solid billet of aluminum with an O-ring seal. Internal flow path is easily serviceable by removing screws and cover.

510 grams

1.12 lbs

WBA-5.75-1.15-AL-01

Water Block Liquid Heat Exchanger

Liquid exchanger to rapidly remove heat from the hot side of TECs or TEGs. Most efficient method of removing heat from multiple TECs or TEGs.

Measures: 5.75 x 5.75 x 1.15 inches

Inlet and Outlet on opposite sides.

Usable flat area of 5.20 x 5.20 inches (132 x132 mm)

18 mounting holes tapped for 6-32 screws

Inlet & outlet tapped 3/8 " NPT: Comes with 2 pieces brass 1/2" ID hose barb fittings.

Will accomodate;

Single TECs or TEGs up to 132 x 132mm

2 to 4 TECs or TEGs up to 62 x 62mm

2 to 4 TECs or TEGs up to 50 x 50mm

2 to 9 TECs or TEGs up to 40 x 40mm

2 to 16 TECs or TEGs up to 30 x 30mm

CNC Machined from a solid billet of aluminum with an O-ring seal. Internal flow path is easily serviceable by removing screws and cover.

1145 grams

2.52 lbs

How to get the most out of a water block

Always use the largest tubing diameter possible. The goal is to maximize the liquid flow through the water block. Larger tube diameters allow a greater flow with reduced friction.
If the water block has a small inlet such as 1/16" NPT, use a larger tubing diameter for the rest of the system and then step the diameter down just before the water block. Step the diameter back up after the water leaves the water block. This keeps the pressure and flow rate maximized.
Keep tubing lengths as short as possible. Unecessary tubing slows the water down and creates more pressure loss.
Increasing flow rate through the water block will remove heat faster, thus giving a lower thermal resistance.
Increasing the pressure will increase the flow rate. For example, a small pump producing only 2 psi may have a flow rate through the water block of 0.5 gpm (gallons per minute). A pump generating 10 psi could increase that flow rate to 1.0 gpm, and building (tap) water at 50 psi could have a flow rate of 3-4 gpm.
If you have a closed loop system, use distilled water and add about 5% propylene or ethylene glycol (antifreeze) to prevent corrosion. Adding antifreeze will also lower the freezing point if you are chilling the water down into that temperature range.
Water has the best heat transfer ability of just about all liquids except for some very toxic and expensive heat transfer fluids. Only use the minimum amount of additives (glycols, corrosion inhibitors etc.) necessary.

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