Part 1 Flashcards
Importance of retrofitting?
Challenges and levels of modernization of existing buildings and energy and water efficiency including quantification of buildings to obtain green building certificate for existing building
Why energy?
We have shortage in energy sources, green house gas emissions, reduce consumption to save energy sources
Importance of operation of the building?
Retrofitting teaches us knowledge and skills to provide improved operational efficiency and achieve financial savings in the operational cost of the building.
How to improve operational efficiency?
Thermal insulation
Building provisions
Preventing air leakage.
Improving quality of internal environment
Integrating passive design elements with existing buildings
Retrofitting?
Segment of the construction industry with much opportunity for expression in the future
Retrofit?
Adding components and accessories to something that it didnt have when manufactured.
Within the built environment, retrofitting have been used for?
Improve energy/water efficiency
Architectural appeal
Indoor environment quality
Adaptation.
Adjust, reuse, or upgrade a building to suit new conditions or requirements
How to choose retrofitting measure?
Easy accessible
Most cost effective
Generic building retrofit probelm?
Optimization problem is to determine, implement and apply the most cost effective retrofit technologies to achieve energy performance while maintaining:
1- satisfactory service levels
2- acceptable indoor thermal comfort.
Retrofitting phases
1- setup and pre-retrofit survey.
2- energy audit and performance assesment diagnoses.
3- identification retrofit options.
4- site implementation and commissioning.
5- validation and verification of energy saving.
Setup and pre retrofit survey:
- Building owners define the scope of work, project targets and time frame.
- Define the available resources to frame tephe budget and programme of work.
- Pre retrofit survey to better understand the building operational problems and the main conecerns of occupants.
- its common to select ESCO to plan and implement the building retrofit.
Energy audit and performance assessment and diagnostics
- energy auditing used to analyse building energy data, understand building energy use, identify areas with energy waste, propose no cost or low cost ECMs.
- performance assessment to benchmark building energy use by using selected KPIs or green building rating system.
- diagnostics used to identify inefficient equipment, improper control schemes and any malfunctions in the building operation.
Identification of retrofit options
- using energy models, economic analysis tools, risk assessment methods, performance of retrofit alternatives quantitatively.
- priotorise the best retrofit alternative based on relevant energy related and non energy related factors.
Site implementation and commissioning
- implement the selected retrofit measures on site.
- test and commissioning (T&C) to tune the retrofit measures to ensure the building and its services systems operate in optimal manner.
Implementation could necessitate interruption to the building and occupant operation.
Validation and verification of energy savings
- after implementation, M&V methods can be used to verify energy savings.
(Validation by energy models, verification after applying by real data). - post occupancy survey to see if the owners and occupants are satisfied with the retrofit results.
