# Hot DI Water System Capacity Upgrade

by David  
Dec 8, 2023

**Creative solutions to solve critical temperature, pressure and flow challenges on an aggressive schedule**

**Location:** USA

**Project Name:** Hot DI Water System Capacity Upgrade

**Project Scale:** –

### Challenge

Hot UPW temperature control at the point of use was a primary problem on 1 of 2 loops serving an HVM fab. The connection of the 2 loops to each other resulted in pressure control issues and anticipated demand was beyond the capacity of the system.

### Barriers

The primary barrier was time. The fab ramp was required aggressive design and construction execution. However, the root causes of the problems were not understood by the operations team.

### Solution

A root cause investigation, including hydraulic analysis, was conducted to determine the root cause of pressure control issues. The underlying issue was revealed after rigorous analysis of trend data. A creative solution was implemented to combine the 2 systems into one and combine supply mains into 3 separate parallel mains to deal with pressure loss issues in the long building. To address timing challenges, the design scope was broken into short-term measures to immediately increase capacity, while in parallel, the longer-term, more intensive solutions to support the full ramp were designed and constructed.

### Impact

Fab demand was met on schedule. The optimized conceptual design creatively maximized the reconfigured existing equipment and minimized capital outlay. Combining the existing UPW mains and adding a parallel main provided additional cost savings and avoided a shutdown. In the course of the analysis, FTD identified an approximate annual energy savings of $107k based on optimization of the Hot UPW Loops and heating water.

**Expertise:** Ultrapure Water

**Services:** UPW Capacity Modeling, Design Criteria Development, Gap Analysis, Conceptual Design, Services During Design, Services During Construction, Capacity Analysis, Troubleshooting

**Products:** [Ultrapure Water Capacity Management Application](/content/upwma/index.html)

**Type:** Capacity

**Client Organization:** Operations