new energy code big5 conference 1

8/12/2019 New Energy Code Big5 Conference 1

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National Committee of Buildings Codes in Kuwait

Energy Code Group

New Version of National Energy

Conservation CodeMEW R 6 2012

Dr. Ali Alajmi


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Outline: Overview of current status of Kuwaits National

Energy Code Outlining the principle of the Energy Codes Understanding the scope of the building energy

codes and how they will impact the design and Comparison of MEW R-6 and ASHRAE

90.1 2010 codes for large office building in Kuwait Conclusion


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Forward

The Kuwaiti government recently formed National BuildingCodes Committee. It identified that the building control system inKuwait is

not broken, (but) it has some significant weaknesses thatmust be tackled if we are to ensure that it remains fit forpurpose in todays world and in the future


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MEW Enforcers

Minimum requirements for efficient energy use in buildingshave been enforced by the Ministry of Electricity and Water

sector (MEW) for all new and retrofitted buildings since1983, through an Energy Conservation Code of Practice

That takes into consideration the fact that consumers pay onlya fraction (5 to10%) of actual cost of power and energy.

Introduction


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MEW Enforcers

The 1983 code specifies minimum thermal resistance forwalls and roofs, size and quality for glazing, fresh air

requirements, and performance standards for A/C systems.More importantly, the code fixes the maximum allowable

power for the A/C system and lighting of buildings based onthe application, area and type of A/C system.

Introduction


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MEW/R-1: Regulations for Electrical Installations MEW/R-2: Procedures for Approval of Electrical & A/C Drawings

and connection of power supply for construction and buildingsprojects.

MEW/R-3: Electrical load form and explanatory memo

MEW/R-4: Regulations for testing of Electrical installations beforeconnection of power supply MEW/R-5: General Guidelines for Energy Conservation in buildings MEW/R-6: Code of Practice for Energy Conservation in Kuwait

building and Appendices

MEW/R-7: Rules and Regulations for design of A/C System andEquipment MEW/R-8: Rules and Regulations for handing over Engineering

Services (Electrical and Mechanical) to the Maintenance Authority MEW/R-9: General specification for electrical installation

1983 Regulations and Code of Practice


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Be easy to apply Be applicable to all types of buildings and systems Be sufficiently adaptable/flexible to accept new technologies

and design approaches Be easy and reliable to law enforcement agency Produce reliable outcomes Be consistent in application Discriminate between better and less good buildings Not have adverse side effects (e.g. on health or safety).

Principle of Energy Codes and Regulations


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Building energy codes are typically divided into sectionsdealing with envelope issues, HVAC systems, lighting, andhot water systems.

A comprehensive energy code should include all these, thoughhistorically (and currently) many building energy regulationsonly address some of them.

Scope of building energy codes andregulations


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Options for structures of buildingenergy codes and regulations

Prescriptive and performance-based codesA prescriptive approach describes an acceptable solutionwhile a performance approach describes the required

performance (Foliente, 2000) Codes could have mixed of prescriptive and performance-

based approached

Elemental and Integrated procedure for compliance


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Options for structures of buildingenergy codes and regulations


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Sequence of Building Regulations

A typical development sequence of building energyregulations is:

Elemental thermal requirements Add trade-offs between elements Fully integrated calculations Extension to energy performance rating.


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Code Basic Structure of Building Regulation

Enforcement of building regulations The process should be audited by the authority under

which the code is issued; normally local or centralgovernment, or by their agents.


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Code Basic Structure of Building Regulation

Enforcement of building regulations Pre-consultation (In most countries start of construction has to be

notified to the building authority) Approval of plans Inspection during construction

(works are inspected during construction. Inspection may be by localauthority or private organization or both according to country).

The process should be audited by the authority underwhich the code is issued normally local or centralgovernment or by their agents.


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Implementation of A Successful Standard andCodes


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Frequent of Updating Energy Code


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Comparison of MEW R-6 and ASHRAE90.1 2010 Codes for Large Office Building in Kuwait


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BASE-CASEThe input was categorized into thefollowing categories: Program Form

Fabric Equipment


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BASE-CASE: Program

Space Temperatures 70F for space heating 75F for space cooling Thermostat setback of 5F


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Base-Case: Form


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Base-Case: Fabric


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Base-Case: Lighting and Plug Loads

MEW R-6 2010


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Results


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Results


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Discussion

ASHRAE 901.1 2010 has better performance in HVAC equipment(water-cooled with COP 4.5) than MEW codes (air-cooled with COP1.7).

ASHRAE 901.1 2010 utilize heat recovery system but MEW codes notenforced in such building size.

MEW R-6 shows better performance on heat gain through envelopeand fenestration.


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Outline: Overview of current status of Kuwaits National Energy Code

Outlining the principle of the Energy Codes Understanding the scope of the building energy codes and how

they will impact the design and Comparison of MEW R-6 and ASHRAE



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ConclusionCodes have to be simple and adoptable.

A continues improvement of codes is extremelyessential

A new philosophy of the MEW codes need to beaddressed (Performance Based)Several aspects in the codes need some kind ofresearch to be done for upcoming codes amendments

Implementation of code enforcement need to beensured.


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Thanks for your kind Attention

new energy code big5 conference 1

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