Revamp for Two Ammonia Train Turbines - Delaval
New Steam Paths for Two 105JT Ammonia Steam Turbines Blower Drive Train
- IST Delaval Legacy
- Ordered Q1 2022
Project Description
One of our North American customers has two identical Delaval steam turbines to drive an ammonia compressor train for their 1100 tons/day ammonia production plants. The customer was eagerly looking for ways to improve their rated power, efficiency & reliability.
Solution
Siemens Energy recommended the customer to do a steam path revamp. Our proven solution increased the Delaval turbine's rated power from 13,095 HP to 17,000 HP, along with a 6-7% efficiency improvement. The improved steam path utilizes optimized airfoil designs, improved seals, and a fine-tuned aerodynamic match of stationary to rotating airfoils. Additionally, improvements to the mechanical components such as bearings, seals, and valve operating gear parts lead to improved reliability as, the customer wanted. Our solution has been sucessfully implemented at the customer site.
Customer Value
The increased rated power of ~4,000 HP helps the customer to expand their production. The 6-7% efficiency gains help the customer reduce fuel costs and lower steam consumption. Additionally, recovery of aging losses will have further steam consumption savings. Improved mechanical reliability helps keep the train online by reducing the number of forced shutdowns..
Delaval Ammonia Turbine Design Rating - After Revamp
| Inlet | Exhaust Pressure | Power | Speed |
|---|---|---|---|
| 545 PSIG / 610°F | 4” HgA | 17,000 HP | 7,035 Rated RPM |
Performance Comparison - Before & After Revamp
| Original Steam Flow @ 13,095 HP | Adjusted Steam Flow for aging loss (est’d) 13,095 HP | Revamp Steam Path @ orig 13,095 HP | Revamp Steam Path @ 17,000 HP |
|---|---|---|---|
| 116,000 Lb/hr | 124,000 Lb/hr | 109,000 Lb/hr | 140,600 Lb/hr |
| 8.86 Lb/HP-Hr | 9.47 Lb/HP-Hr | 8.32 Lb/HP-Hr | 8.27 Lb/HP- Hr |
