E-CLEAN ENERGY SAVINGS SOLUTION tested by NTU

8/11/2019 E-CLEAN ENERGY SAVINGS SOLUTION tested by NTU

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NTU Lab Report

restricted to about 7 hours a day during weekdays when the relevant laboratory staff are

present. The load banks are not operational during public holidays, weekends and on days

when the laboratory is being used for other purposes.

TEST RESULTS

4. Pre-E Clean Data. The Kwh consumptions were taken at the end of each operation

day and normalised against the operating hours to arrive at Kwh used per hour. On

average, the pre-E Clean active power data for inductive and resistive setup was

0.7655Kwh/h and 14.7812kwh/h respectively. The average reactive power for inductive and

resistive setup was 13.3453 Kvarh/h and 0.3034 Kvarh/h respectively.

Table 1: Inductive Load Data Before E Clean Activation

Table 2: Resistive Load Data Before E Clean Activation

5. Post E Clean Results for Inductive Load. E Clean was activated on the 13th

Aug 2013.

Based on the first week data, active power saving was 8.1% and reactive power saving was

46.6%. On the second week, the savings improved to 10.7% and 48.0% for active and

reactive power respectively.


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Table 3: Inductive Load Data After E Clean Activation

6. Post E Clean Results for Resistive Load. E Clean was activated later on the 21st Aug

2013 due to the intense heat generated from resistive load banks. From the 6-day

operations, the saving observed was 1.9% and 14.8% for active power and reactive power

respectively.

Table 4: Resistive Load Data After E Clean Activation


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NTU Lab Report

7. Termination of Lab Testing. The lab operations were halted prematurely after 30

Aug due to increased safety concerns of high heat signature created within an enclosed lab

area.

TESTING EQUIPMENT

8. The Smart Kwh Meters used for the lab tests were model DTZ1513, backed up by an

analog Kwh Meter (ITRON) which provided only the active power readings. The Smart Kwh

Meter is connected directly to the computer for data download and therefore more precise

in its data records. The Smart Kwh Meter is applied for active and reactive power

measurement of both residential and commercial usage in low/mid/high voltage system and

power transmission and distribution field. It combines all the functions of measurements,

monitoring, alarm, display, control and communication, and it is one of the terminalproducts of power load meter reading, control management system (AMI/AMR) and smart

power grid.

Low voltage3P4W direct connection type.

Low voltage3P4W CT connection type.

Mid/high voltage3P3W CT/PT connection type

Diagram 4: Picture of the Smart Kwh Meter


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CONCLUSION

9. The laboratory test setup and environment provided a constant load platform to

validate the energy savings potential for E Clean Energy Savings Solution for both inductive

and resistive loads. For safety reasons, the operations were non-continuous and in force

only when the laboratory staff were present. From the test period, E Clean Energy Savings

Solution showed more potential for energy savings for the inductive load as compared to

the resistive load. For the inductive load, there was generally an upward trend in energy

savings. Active power savings improved by more than 32% from the first week (8.1%) to

second week (10.7%) based on average weekly data. Reactive power saving was evident

from the first week (46.6%), and marginally improved to 48% on the second week. For the

resistive load, after only a 6-day operation, active power improved by 1.9% and reactive

power improved by 14.8% based on average data.

Compiled by NTU Laboratory Staff

(Mr Thomas Foo, Mr Lim Kim Peow and Ms Jennifer Ng)

E-CLEAN ENERGY SAVINGS SOLUTION tested by NTU

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