executive report - dedee-lib.dede.go.th/mm-data/bib15433executiveroport.pdf · 2015. 6. 2. · fegs...

Executive Report

The Study of Drafting Energy Efficiency

Standard on Industrial Fans

Proposed to

By

Chiang Mai University

March2015

Executive Report

The Study of Drafting Energy Efficiency

Standard on Industrial Fans

Proposed to

Department of Alternative Energy

Development and Efficiency

Ministry of Energy

By

Chiang Mai University

March 2015

Executive Report The Study of Drafting Energy Efficiency Standard on Industrial Fans

Chiang Mai University Executive Report - 1

Executive Report

Project: The Study of Drafting Energy Efficiency Standard on Industrial Fans

Owner: Department of Alternative Energy and Development and Efficiency, Ministry of Energy, Thailand

Counselor: Faculty of Engineering, Chiang Mai University

Duration: 12 months (April 2nd, 2014 – April 1st, 2015)

Budget: 5,050,000 THB

Contract No.: 239/57



Executive Report

Industrial Fans are wildly used as a component in the air conditioning, ventilation system in most commercial and industrial buildings and, also, involved in some of the industrial activities. The market share of 1,500 million THB/year, nowadays, in Thailand comprise of 80 percent from the international companies (36 percent from the large-well known importer enterprise) and 20 percent from the Domestic companies (Figure 1).

Figure 1 Market share of Thailand’s industrial fan

American Society of Mechanical Engineers (ASME) stated that an air-moving device with specific ratio (Pressure Outlet / Pressure Inlet) below 1.11 with pressure rise up to 1.136 mWg shall be called “Fan”.

From the market survey, the market share of Thailand’s fan is shown in Figure 2. With 2,734 series from 19 brands, the fans were categorized by their flowrate, shown in Figure 3, where some fans have already been certified by AMCA and obtained the fan curved.

Large - well known importer enterprise 36%

Domestic Company 20%

International Company/Importer 44%



Figure 2 Thailand’s fan Market share

Figure 3 Fan categorized by flowrate

Industrial fan can also be categorized by its characteristic into 3 main different types.

1. Forward Curved Blades Centrifugal fans - suitable for air transfer within short range, low to medium volume flowrate, non-producing noise.

Etc.

4%



2. Backward Curved Blades Centrifugal fans - suitable for air transfer within medium to long distance range, able to produce high pressure flowrate, noise shall be observed during working period.

3. Axial fans - suitable for air transfer in linear direction, usually found in the building’s ventilation system. Noise shall be observed during working period.

The only fan standard introduced to Thailand is the testing standard for the table and household fan. This standard is not suitable for the industrial fan with differences in impeller, working pressure and volume flow rate. Therefore, the study of drafting efficiency standard on industrial fans was launched in pursuit of developing the energy efficiency of Thailand’s industrial fan, encouraging the change to the industry, especially the domestic owners. The procedures are as following.

1. Study the testing standard, including details and requirement on the energy efficiency of the industrial fans

2. Randomly selected and proceeded performance test on the representative group of Thailand’s industrial fan

3. Setting the appropriate energy efficiency level for Thailand 4. Set up meeting for public hearing 5. Conclusion

The proceeding details are proposed in the following topics.

1. Standard and testing procedure for industrial fans

Since Thailand has not acquired the industrial fans testing standard, the international procedure were studied. As a result, 2 international standards were introduced; the ISO 5801: 2007 Industrial fans – Performance testing using standardized airways, and the ANSI/AMCA 210-07: ANSI/ASHRAE 51-07: Laboratory Methods of Testing Fans for Certified Aerodynamic Performance Rating. Compared on details, these 2 standards share the same details, but only the ISO is mostly applicable in Europe while the ANSI is declared in the United States. Apart from these 2 standards, JIS B 8330-2000 Testing method for Turbo-fans by Japan is an optional selection, yet, all the details is covered in the ISO 5801. Due to Thailand standard record which mostly following the ISO, Hence, ISO 5801:2007 was selected as the testing standard in this project.



There are 4 fan installations mentioned in ISO 5801: 2007 Industrial fans – Performance testing using standardized airways, shown in Figure 4.

A. Free Inlet, Free Outlet B. Free Inlet, Ducted Outlet C. Ducted Inlet, Free Outlet D. Ducted Inlet, Ducted Outlet

Figure 4 ISO 5801:2007 Fan Installations

The installations are selected based on the fan application. The only requirement is to mention the installation type in the experiment report. An example of ISO 5801:2007 Free Inlet, Free Outlet is shown in Figure 5.

Figure 5 ISO 5801: Free Inlet, Free Outlet Installation on the outlet-side multiple nozzle test chamber

A B

C D



2. The selection and the experiment of the representative fans

From the market survey, there are 2,734 series of industrial fans available in Thailand under 19 brands. The fans are, first, categorized by their volume flowrate.

Considering the fan applications in Thailand, most fans are installed to the AHU 50 tons of refrigeration or below in the air-conditioning or the ventilation system which flowrate is about 34,000 CMH (20,000 cfm). Statistically, 61.3 percent of all industrial fans in Thailand are below 34,000 CMH. Applied Yamane method, with 10 percent tolerance, 95 percent confident level, to 1,677 sampling populations, the result indicated that 95 samples were needed to be studied. Re-categorized the fan, 101 samples were selected in order to represented Thailand’s fans.

Fan performance was evaluated in a nozzles chamber that was designed and built in-house. The fan efficiency is proportional to the volume flowrate and the built-up pressure over the shaft power. Peak Efficiency acquired from each fan was evaluated via Fan Efficiency Grades (FEG) following ANSI/AMCA 205-12: Energy Efficiency Classification for Fans. According to the efficiency classification in ANSI/AMCA 205-12, fans can be categorized into Fan Efficiency Grades (FEGs) depending on its peak efficiency at a given impeller diameter. The FEGs chart is shown in Figure 6. The experiment’s results are shown in Figure 7.

Figure 6 Fan Efficiency Grades Chart



Figure 7 Peak efficiency classification of the representative fans

3. The appropriate energy efficiency level for Thailand Internationally, the minimum boundary for FEG is undeclared. There are some voluntary

criteria and suggestions as following.

A. ASHRAE 90.1-2013 Energy standard for buildings suggested fan with FEG67 or higher in fan system with 5 hp (4 kW) power drive or above. Also, the application should design for working period within 15 percent of the fan peak efficiency.

B. ASHRAE 189.1 High-Performance Green Buildings suggested the criteria following ASHRAE 90.1 but required working period within 10 percent of the fan peak efficiency.

C. International Green Construction Code (IgCC-2012) suggested the fan with 750 Watt (1 hp) power drive shall achieve FEG71 and required working period within 10 percent of the fan peak efficiency. This regulation is under re-consideration process at present.



D. Malaysian Code of practice on energy efficiency and conservation for industrial electrical equipment - Part 1: Fans suggested minimum fan energy efficiency potential at FEG71.

Following ASHRAE 90.1-2013, Figure 5 shows that 72 of 101 representative fans (71.3 percent) acquired FEG67. These 72 models comprise of 17 domestic fans (16.8 percent overall) and 55 international fans (54.4 percent overall). However, there are 29 fans (12 domestic models and 17 international models) below the criterion.

4. Seminar and Public hearing

The seminar and public hearing were launched in order to reveal the results of this study to public, including the fans companies and importers. 58.8 percent of the attendants agreed to follow ISO 5801:2007 as an industrial fan testing standard. Moreover, 75 percent of the attendants agreed to set the HEPs of the industrial fan at FEG67. In addition, the attendants also agreed that only HEPs shall be set for the first stage in order to encouraging the development.

5. Conclusion

In Thailand, fans industry has a significant market worth of 1,500 million THB/year. The share comprise of 80 percent international models and 20 percent domestic models. The study of 101 representative fans following the fan testing standard ISO 5801:2007 and categorized by FEGs from ANSI/AMCA 205-2012 found that the appropriate HEPs for Thailand’s industrial fan is FEG67. This criterion, FEG67, gives an opportunity for Thai domestic fans to compete with the international models, yet, urging the development among the fan companies to reach their higher performance. However, the support on the research and development is needed in order to maintain the domestic fans in, both performance and price, competition. The research on developing fan characteristic design should be launched and allowed the Thai companies to access the results. The MEPs shall be done further.



Since Thailand has not acquired the industrial fans testing standard and the certified testing facility, the ISO 5801 should be able to deploy within 2 years. In addition, the certified testing facility shall be able to establish within a year with 50 million THB budget.

The conclusions are accepted by the working committee of the Study of Drafting Energy Efficiency Standard on Industrial Fans project.

Executive report - coverExecutive Roport- Industrial Fan

executive report - dedee-lib.dede.go.th/mm-data/bib15433executiveroport.pdf · 2015. 6. 2. · fegs...

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