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Building energy saving and green renovatin

* I. Background

  In Taiwan the percentage of existing buildings accounts for about 97%. The most common problems of these buildings include high energy consumption, poor environmental quality, and ignorance of the ecological concept. Therefore, the ABRI has conducted green renovation projects for governmental buildings and building energy efficiency upgrade program since 2003 as demonstrative projects to progressively expand the effects to promote the green renovation for existing buildings. The renovation efforts are aimed at enhancing building energy efficiency and mitigating Urban Heat Island (UHI) effect, and also facilitating the green energy industry development.

  For strengthening the promotion of energy saving and carbon reduction, the “Green Building Promotion Program (2001- 2007), “Eco-city and Green Building Promotion Program (2008-2011), and current “Intelligent Green Building Promotion Program (since 2012), the ABRI has injected resources and budgets to subsidize a series of green building renovation and energy efficiency upgrade in order to set up a feasible pattern for further implementing existing building improvement. By the end of 2013, a total of 200 projects for central government buildings and 271 ones on energy efficiency improvement have been completed. The outcomes of these pioneer and demonstrative projects have shown significant effects on water infiltration and retention, vegetation planting, ecological environment protection and energy conservation, which are expected to contribute to the mitigation of global warming and UHI effect as well.

* II. Achievements (2003-2013)

(I) Summary of Achievements and Benefits

  1. Building Energy Efficiency Upgrade (BeeUp) Program
    A total of 216 energy efficiency upgrade projects for existing buildings of the central government and national universities/school has completed under an investment of 960 million NTD. The remarkable annual electricity saving and CO₂ emission reduction is estimated to reach 206 million NTD and its payback period about 4.7 years. The effect analysis is listed in Table 1.
  2. Green Building Renovation and Diagnosis Projects
    From 2003 to 2011, a total of 179 green building renovation and diagnosis projects for existing buildings of the central government and national universities/school has completed focusing on the issues of energy saving, vegetation planting, and ecological environmental protection and restoration. The outcomes of the projects have proved to be examples for green renovation of existing buildings. Its effect analysis is listed in Table 2 and 3.
  3. Building Energy Efficiency and Green Renovation Plan for Governmental Buildings
    For simplifying administrative procedures and facilitating program promotion, the ABRI has combined the above two programs into the subsidy plan of “Building Energy Efficiency and Green Renovation for Governmental Buildings.” Its investment in 2012-2013 was 176.03 million NTD to subsidize 80 projects for energy efficiency enhancement and green building improvement. The estimated annual saving in electricity may reach 6.82 million kWH, 427 thousand cubic meters in gas, and 100 thousand liters in fuel, where the gas and fuel saving is equivalent to 1.08 million kWH. The total monetary saving is approximated as 31.83 million NTD and its payback period about 5.5 years. As for indirect effects, the CO₂ emission can be reduced about 4.45 million kg (11.5 times the size of Taipei Da-an Forest Park), which is beneficial to protect the built environment. Its effect analysis is listed in Table 4.

(II) Compiling Technical Manuals for Publication

  According to the 3296 meeting minute of the Executive Yuan in 2012, the Premier concluded that, in brief, “the Executive Yuan may become the pioneer and paradigm to demonstrate energy saving and carbon reduction, and to further promote actual experiences to other administrative authorities.” Hence, the ABRI completed the “Technical Manual of Air-Conditioning Energy Efficiency Improvement for Existing Buildings” to further promote the experiences and effects in energy saving and carbon reduction. The ABRI has also officially notified other government agencies and authorities for further checking out the detailed information on the website of the ABRI (, and downloading electronic files as references.

(III) Assisting other central government agencies in building energy efficiency diagnosis

  In response to the adjustment of fuel and electricity prices and to the extensive promotion of building energy saving effects, the ABRI provided the building energy efficiency diagnosis and consulting services on improvement techniques and completed 32 existing buildings of central government agencies as demonstrative projects in 2012. The ABRI formed a service team involving green building scholars, experts, architects, refrigeration A/C P.E., and mechanical P.E. for technical consulting of building energy efficiency improvement. First of all, the responsible team members conduct an on-site investigation and measurement to evaluate the actual energy consumption of the building and to further come up with proper improvement strategies. Through reviewing current conditions, the team member can thus propose concrete suggestions, expected effects, and budget estimation. The review and evaluation on energy efficiency is typically focusing on the following terms: (1) A/C system improvement; (2) water heating system enhancement; (3) indoor lighting improvement; (4) sun-shading improvement; (5) roof insulation improvement. And each individual agency will budget for the follow-up project implementation and carry out the construction to put energy efficiency of existing buildings into effect, so as to achieve the overall goal of energy saving and carbon reduction.

* III. Major Tasks of 2104

  In 2014, at least 33 demonstrative projects are currently conducted with the following emphases:

(I) Objects:

Existing buildings of the central governmental and national universities/ schools with improvement potentials are eligible.

(II) Improvement emphases:

The improvement is focusing on the A/C, water heating, old air condition engine performance improvement or eliminate, the outdated air-conditioning system energy efficiency with simultaneously introducing Building Energy Management System (BEMS) and a variety of techniques for indoor lighting, heat insulation, and exterior sun-shading measures. Besides, some strategies including low-cost/no-cost techniques, Operation and Management (O&M), and Testing, Adjusting and Balancing (TAB) procedures, are applied into the system management to increase the building energy efficiency and carbon reduction effects for further promotion and demonstration.

(III) Implementation Method:

The authorized organization commissioned by the ABRI first forms a consulting service team for building energy efficiency and green renovation and notifies central governmental agencies and national universities/schools to elicit potential applicants. The team is first selecting the potential objects based on the application documentation and then conducting an on-site investigation, measurement and diagnosis, to determine the participating projects with improvement potentials. Finally the team will come up with feasible improvement guidelines for follow-up construction work and consulting services.

(VI) Selection Principals:

The main goal of the plan is to promote and demonstrate green building improvement for existing buildings. The project selection principals are summarized as follows:
  1. Beneficial to the promotion, demonstration, and education of the Green Building Promotion Program.
  2. Significant effects on energy saving and CO₂ emission reduction.
  3. Significant improvement on central A/C, lighting, and water heating systems.
  4. High demand for building uses and strong intention and capability to carry out the work.
  5. Considering the balances among different areas of Taiwan, and the Low Carbon Island Demonstration Program, the projects located in the other offshore islands of Taiwan (Penghu, Green Island, Hsiao Liu Chiu, Kinmen)will be considered as the first priority.
  6. Important office buildings or exhibition centers with higher promotion effects or more users and visitors, also including the users can provide the historic electricity use data from the target buildings.
  7. The projects didn’t receive the subsidy will be considered as the first priority.

* VI. Future Perspectives

  Due to its demonstrative purpose, the projects of the plan are scattered in the main island and other offshore islands of Taiwan and have shown a significant effects on energy efficiency improvement that is beneficial to the green building promotion. The technical manual also greatly contributes to the green building promotion and applications in the private sector.

(I) Continuously conducting the subsidy plan in 2014:

Following the past implementation experiences, the plan will focus on replacing outdated A/C compressors for indicative projects so as to substantially enhance energy efficiency effects. The ongoing plan will be implemented in order to soundly achieve the improvement goal.

(II) Strengthening the promotion and education of energy saving techniques:

For widely promote the energy saving practices, the ABRI completed the collection of various energy efficiency improvement techniques and published on the website for further references and applications. In the future, the ABRI will keep extensively promote the improvement accomplishments on existing buildings, in hopes of tremendously increasing energy saving and carbon reduction effects and effectively consolidating the green industry development so that the win-win goal of environmental protection and industry development can be ultimately achieved.

Table 1 Energy Saving Effects of the Subsidy Plan of
“HVAC Energy Efficiency Improvement for Central Governmental Buildings”
and “Building Energy Efficiency Upgrade Program” (from 2003 to 2011)
Year Investment
CO₂ reduction
Monetary saving
2003 228,000,000 14,022,262 10,149,313 46,273,465
2004 93,000,000 4,477,981 3,889,395 14,777,338
2005 107,350,000 6,320,932 5,490,109 20,859,075
2006 114,250,000 6,294,545 4,545,235 20,772,000
2007 96,590,000 6,320,932 4,575,090 20,859,075
2008 10,2851,307 5,486,579 3,494,946 17,008,395
2009 82,021,992 6,986,427 4,674,994 31,842,555
2010 79,082,488 7,645,548 3,773,591 19,574,427
2011 56,759,144 4,073,712 2,561,668 12,576,378
Total 959,904,931 61,628,918 43,154,341 204,542,708

Table 2 Effects of Green Building Remodeling Projects for Central Governmental Buildings and National Schools
Item Performance (unit) 2003 2004 2005 2006 2007 Total
Ecology Availability of
food source (birds)
11,660 5,190 3,640 540 27,100 48,130
Availability of
food source (insects)
11,660,000 5,190,000 3,640,000 540,000 27,100,000 48,130,000
Vegetation Planting CO₂ reduction (kg) 10,949,096 8,011,203 8,909,580 170,000 2,816,000 30,855,879
Water Content Water content and
runoff management(m3)
36,896 1,483 969 3,072 34,056 76,476
Waste reduction, Reuse of existing buildings Timber structure
and CO₂ reduction (kg)
-- 651,600 807,831 1,138 300,455 1,761,024
Envelope energy saving Electricity saving
2,970,984 93,638 484,697 85,411 47,841 3,682,571
Monetary saving
7,427,460 234,095 1,211,743 213,528 119,603 9,206,429
Heat pump and water heating Electricity saving
954,710 -- 954,710
Monetary saving
2,386,775 -- 2,386,775
Solar water heating Electricity saving
380,400 2,606 -- 383,006
Monetary saving
951,000 6,515 -- 957,515
A/C and lighting energy saving Electricity saving
(1,000 kWH/year)
1,095,510 9,600 1,105,110
Monetary saving
2,738,775 24,000 2,762,775
Rainwater, grey water, and water saving Water saving
174,400 98,388 94,890 49,675 35,100 452,453
Monetary saving
1,831,200 1,033,074 996,345 521,588 368,550 4,750,757

Table 3 Effects of Green Building Renovation and Diagnosis Projects
item unit 2008 2009 2010 2011 Total
Water content and runoff management Water content and runoff management (m3) 18,000 912 910 829 20,651
Green rooftop CO₂ reduction (kg) 285,000 157,000 187,700 58,073 687,773
Outdoor shades
Envelope energy saving Electricity saving (kWH/year) -- -- -- 4,000 4,000
Monetary saving (NTD) -- -- -- 18,000 18,000
Lighting Electricity saving (kWH/year) 175,000 1,187,600 1,118,850 423,480 2,904,930
Monetary saving (NTD) 437,500 2,969,000 2,797,125 1,058,700 7,262,325
Water reuse an water saving Water saving (ton) 64,000 3,600 5,011 3,100 75,711
Monetary saving (NTD) 672,000 37,800 52,616 32,550 794,966

Table 4 Effects of Building Energy Efficiency and Green Renovation Plan for Governmental Buildings Projects
item unit 2012 2013
A/C system improvement Electricity saving (1,000 kWH/year) 1,150 1,852
Monetary saving (1,000 NTD) 5,230 5,783
Water heating system enhancement Electricity saving (1,000 kWH/year) 240 1,103
Gas saving (10,000 M3/year) 20.1 22.6
Monetary saving (1,000 NTD) 3,690 7,017
Install or upgrade BEMS Electricity saving (1,000 kWH/year) 1,060 483
Monetary saving (1,000 NTD) 4,990 1,538
Exterior sun –shading improvement Electricity saving (1,000 kWH/year) 12 50
Monetary saving (1,000 NTD) 55 205
Roof heat insulation improvement Electricity saving (1,000 kWH/year) 29 3
Monetary saving (1,000 NTD) 122 12
Indoor lighting improvement Electricity saving (1,000 kWH/year) 277 560
Monetary saving (1,000 NTD) 1,231 1,960
Total Electricity saving (1,000 kWH/year) 2,768 4,051
Gas saving (10,000 M3/year) 20.1 22.6
Monetary saving (1,000 NTD) 15,318 16,515


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