​

Simtech Valley Block Clean Room, Singapore

Clean Room environment with WCPU

Installed cooling capacity of 164RT, cooling tower capacity of 250RT

​

​

​

​

​

​

​

​

​

​

​

​

​

Simtech Valley Block Cooling Tower System Schematic

​

​

Baseline

Baseline data was collected from period 13 Sep 2015 - 13 Oct 2015.

​

Energy and humidity data was collected with using Simtech's E2Mas System.

​

Results Post Deployment

DCI was deployed 16 Oct 2015.

Chemical dosing systems were shut off upon deployment.

​

Energy Efficiency Improved 17.5%.   Energy savings of 80,680kWh/yr

Carbon footprint reduction 34,950 kgCO2/yr

Temperature fluctuation decreased from 0.54 C to 0.17 C

Humidity fluctuation decreased from 9.84% to 4.29%

​

The impact of ambient temperature changes are taken into account using Pearson's correlation coefficient on average daily temperature of Jurong West District from Meteorological Service Singapore.

​

Energy

In the beginning of the stabilisation and cleaning period, the DCI started working by removing the hard scales in the cooling tower/chiller (from 16/Oct to 27/Oct). After the hard scale was removed, the power consumption of the RWCPs dropped to a range between 43 kW and 48 kW, and the DCI system started to remove the soft scales.

 

During the soft scale removal process, the power consumption level of the RWCPs showed a continuous declining trend until it reached the fully cleaned state on 28/Nov. After that, the DCI worked to maintain a fully cleaned state and the power consumption of the RWCPs was stabilised at 43 kW to 43.41 kW. So the above power consumption analysis shows that the DCI reduces the power
consumption after using it.

​

​

​

​

​

​

​

​

​

​

​

​

 

 

 

 

 

 

 

After running DCI, Simtech's cooling systems shown a clear improvement in energy efficiency as seen in the summary below.

​

​

 

 

 

 

 

 

 

 

 

 

​

Temperature and Humidity

Before DCI system was installed, the measured temperature fluctuated in an irregular pattern and deviated substantially from the set point. The average difference of measured temperature and humidity was 0.54°C and 9.84% respectively from the settings.

 

 

 

 

 

 

 

 

 

 

 

After the DCI system was installed, the average difference of the measured temperature and humidity was 0.10°C and 6.28% respectively from the settings. After the DCI system had fully cleaned the cooling water system, the average difference of the measured temperature and humidity was 0.17°C and 4.29% respectively from the settings.

​

​

​

​

 

 

 

 

 

​

​

The below table is a summary of of the temperature and humidity results.

​

​

​

​

​

​

​

​

​

​

​