Comparison with Shell and Tube

A multitubular heat exchanger for the nitrogen compressor was replaced with the DCHE. As a result, the DCHE could be made significantly more compact, approximately 10 % in volume and less than 15% in weight, compared with a multitubular heat exchanger of the same heat transfer performance and pressure loss. Also, the overall heat transfer coefficient increased to 200 %. This means that the energy efficiency is improved.

Feature of Diffusion-bonded Compact HX (DCHE) Comparing with Shell & Tube

Excellent Performance and Compact

Comparing with Shell & Tube type HX

Diffusion Bonding

Feature of diffusion bonding

Item	DCHE
Material	Stainless Steel
Applicable temp	<650°C
Applicable press	<100MPa
Fluid	Hydrocarbon, Cooling water and others

Stacking Layer Structure

DCHE can be designed not only two stream but also multi stream. Stream number is normally limited by the availability of external space to mount headers. On the right drawing, this is the example for three streams type.

	DCHE	SHELL & TUBE
Material	Stainless	Stainless steel, Titanium
Number of stream	Suitable for 2 or 3 (less than 6)	2
Fluid	Water and others	Sea water, water and others
Allowable temperature difference Hot & Cold (°C)	＜200 °C	＜200 °C
Desin temperature (°C)	-196 to 500	-196 to 500
Desin pressure (MPaG)	＜100	＜50
Capex (-)	50 to 200 ＜100 (over 5 to 10 MPa)	100
Plot area (-)	1	5 to 10
Most suitable condition	High pressure, Cryogenic	Cryogenic

The higher the design pressure goes, the bigger/larger the size of the S&T heat exchanger becomes. DCHE is more suitable for design pressure over 5 to 10 MPa in terms of foot print and cost.

Contact

Sales & Marketing (Tokyo Office), Static Equipment Section Energy & Chemical Machinery Department: TEL: +81-3-5739-6652

Inquiry

Engineering Section (Takasago Equipment Plant), Static Equipment Department Industrial Machinery Division Energy & Chemical Equipment Business Unit (Hyogo): TEL: +81-79-445-7214

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