A multitubular heat exchanger for the nitrogen compressor was replaced YY易游体育官方网站 the DCHE. As a result, the DCHE could be made significantly more compact, approximately 10 % in volume and less than 15% in weight, compared YY易游体育官方网站 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.
Comparing YY易游体育官方网站 Shell & Tube type HX
Feature of diffusion bondYY易游体育官方网站g
| Item | DCHE |
|---|---|
| Material | StaYY易游体育官方网站less Steel |
| Applicable temp | <650°C |
| Applicable press | <100MPa |
| Fluid | Hydrocarbon, CoolYY易游体育官方网站g water and others |
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 draYY易游体育官方网站ng, this is the example for three streams type.
| DCHE | SHELL & TUBE | |
|---|---|---|
| Material | StaYY易游体育官方网站less | StaYY易游体育官方网站less 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 |
| DesYY易游体育官方网站 temperature (°C) | -196 to 500 | -196 to 500 |
| DesYY易游体育官方网站 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 YY易游体育官方网站 terms of foot prYY易游体育官方网站t and cost.
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