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22대 대한민국 국회 국회정보길라잡이 국회의원검색
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Title page 1

Contents 8

Abstract 3

Executive Summary 4

Introduction 10

Project overview 10

Project scope 13

Literature review 15

Academic literature review 15

Academic literature characteristics 15

Data collection methods 17

Insulation degradation - Laboratory tests 19

Insulation degradation - In situ 22

Degradation of installations 23

Degradation of the structure 24

Observations from academic literature 25

Unequal representation of insulation products 25

Lack of in situ or field measurement 25

Research focus rarely considers energy/carbon implications 26

Differentiation between underperformance and deterioration 26

Unrepresentative assessment of ageing effects 27

Grey literature review 27

Insulation manufacturers' trade associations 27

Manufacturer product literature 28

International standards 30

Product guarantee/certification schemes 31

Government reports 32

Non-public datasets 33

Technical analysis 35

Overview 35

Existing dataset review 35

National Energy Efficiency Data-Framework (NEED) 39

Smart Energy Research Lab (SERL) 40

Energy Systems Catapult living lab 40

Datasets not in public domain 40

Analysis of existing datasets 41

Expert stakeholder engagement 43

Overview 43

Expert stakeholder workshop 43

Expert stakeholder workshop findings 43

Delphi study 45

Expert stakeholder engagement summary 50

Recommendations for future phase 51

Performance data for aged retrofit materials 52

Data requirements 52

Methods and approach 52

Sampling and recruitment strategy 54

Appraisal of existing UK retrofit quality 54

Data requirements 54

Methods and approach 54

Sampling and recruitment strategy 54

Anticipated contribution to knowledge 56

Appendix 1 - Literature review methods and process 57

Systematic academic literature review 58

Systematic review results 59

Appendix 2 - Academic literature bibliography 61

Appendix 3 - Expert stakeholder workshop 73

Appendix 4 - Delphi methodology and Round 1 and 2 results 76

Appendix 5 - Delphi questionnaires 84

References 85

Tables 12

Table 1. DRIP Phase 1 research work packages 12

Table 2. Research methods observed in the literature 18

Table 3. Manufacturer stated product lifetimes 29

Table 4. Summary of British Standard insulation deterioration over time statements 30

Table 5. Identified datasets 36

Table 6. Summary of Delphi round 1 and 2 46

Table 7. Estimates of the average percentage of insulation deterioration. Standard deviation shown in brackets; n value denotes sample size 48

Table 8. Proportion of insulation quality ratings in UK housing, taken from the EPC database 55

Table 9. Required survey sample for insulation quality ratings in UK housing 55

Table 10. PICOS eligibility criteria for systematic literature review 58

Table 11. Search terms for systematic literature review 59

Table 12. Screening stages for Scopus database results, first search 59

Table 13. Screening stages for Scopus database results, second search 60

Table 14. Screening stages for ProQuest database results 60

Table 15. Workshop 1 participants 73

Table 16. Summary of Delphi study participants by stakeholder group 77

Table 17. Focus of, and participation in, each Delphi round 77

Table 18. Results from the first Delphi Round 78

Table 19. Results from the second Delphi Round 81

Figures 12

Figure 1. DRIP Phase 1 work packages 12

Figure 2. Academic literature, by publication date 15

Figure 3. Academic literature, by publication region 16

Figure 4. Academic literature applying in situ measurement, by region 16

Figure 5. Academic literature, by research method 16

Figure 6. Median annual percentage gas savings (electricity savings for Solar PV), in the 6 years following installation, relative to savings in Year 1,... 41

Figure 7. Expert estimates of the percentage of insulation retrofits showing deterioration 48

Figure 8. Process of systematic literature review 57

Figure 9. Photographs from the EWI and IWI rooms during the workshop 74

Figure 10. Initial classifications of deterioration of retrofit used for the group discussion 75

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