Productivity, investment and energy in a naturally ventilated lean office development

Transcription

1 Productivity, investment and energy in a naturally ventilated lean office development Dr Craig Robertson Allford Hall Monaghan Morris Ltd crobertson@ahmm.co.uk Quang Anh Ding UCL BSGS Nic Crawley AHMM Prof. Dejan Mumovic UCL IEDE Ian Fitzpatrick AHMM

2 Structure Strategy Aims Methods Productivity & Comfort Energy Controls and IAQ What next?

3 Strategy

4

5

6

7

8

9

10

11

12

13 Fabric Solar control

14 Lean design Daylight Naturally ventilated

15 Toolkit Case Studies Social space Radiators LZC technology

16 Aims

17 Aims Examine the relationship between productivity, investment and energy consumption in the development of a BREEAM outstanding central London office building.

18 Investment

19 % annual costs % Operating Costs 2014 % Operating Costs 10 0 Utilities Costs Rent Payroll Other Total Build Costs Cat B costs Annual operating costs One off capital costs

20 % annual costs % Operating Costs 2014 % Operating Costs 10 0 Utilities Costs Rent Payroll Other Total Build Costs Cat B costs Annual operating costs One off capital costs

21 % annual costs % Operating Costs 2014 % Operating Costs 10 0 Utilities Costs Rent Payroll Other Total Build Costs Cat B costs Annual operating costs One off capital costs

22 % annual costs % Operating Costs 2014 % Operating Costs 10 0 Utilities Costs Rent Payroll Other Total Build Costs Cat B costs Annual operating costs One off capital costs

23 Methods

24 Methods A mixed methodology: longitudinal BUS (Building User Survey) monitored environmental conditions CIBSE TM22 energy consumption study investment and operational costs

25

26

27 The Role of Energy Information Feedback in Design and Construction Practice

28 Productivity

29 Perceived productivity Old office New office

30 Actual Productivity? % Fees versus Costs % Fees versus Costs Margin Cost per architect

31 Absenteeism and Staff Turnover 1.6% 1.4% 1.2% 1.0% 0.8% 0.6% 0.4% 0.2% 0.0% All sites London Bristol OKC 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% Before Move After Move Before Move After Move

32 Absenteeism and Staff Turnover 1.6% 1.4% 1.2% 1.0% 0.8% 0.6% 0.4% 0.2% 0.0% All sites London Bristol OKC 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% Before Move After Move Before Move After Move

33 Thermal Comfort

34 BUS summary

35 Thermal Comfort

36 Thermal Comfort C Working Hours th Av. Temp 5th Av. Temp R1 Temp 25 C 28 C /21/14 8:30 7/22/14 8:30 7/23/14 8:30 7/24/14 8:30 7/25/14 8:30 7/26/14 8:30 7/27/14 8:30

37 Thermal Comfort - Winter Temperatures 4 th floor 5 th floor Winter Criteria Summer Criteria

38 Thermal Comfort - Winter Old office New office

39 Thermal Comfort - Summer Temperatures 4 th floor 5 th floor Winter Criteria Summer Criteria

40 Thermal Comfort - Summer Old office New office

41 Energy

42 Toolkit Energy Case Studies UCL Energy Institute Seminar 11/11/2014 CIBSE Technical Symposium Craig Robertson

43 Energy kwh/m² Design Actual 4th floor Actual 5th floor Electricity kwh/m² Gas kwh/m² Actual Cumulative CIBSE TM 46

44 Thermal Comfort

45 Thermal Comfort

46 Thermal Comfort 1 Unit Power per 6m² Total office 1 Lighting 12.5 W/m ² 75W 2 Dell P2414Hb W 38W 3 Nortel NTDU91 5W person W 120W 3 5 Dell Precision T W 150W 4 Total 388W 104,760W 5 1. I:\AHMM Images 2010\10083 Morelands Rooftop\5.0 Reports\Morelands Rooftop_BCO Award Folder 2. From equipment boiler plate McMullan, R. & Seeley, I.H., Environmental science in building, Basingstoke: Palgrave Macmillan. 5.

47 Controls & IAQ

48 Controls Old office New office Heating Control Cooling Control Temperature v. CO₂ UCL Energy Institute Seminar 11/11/2014 CIBSE Technical Symposium Craig Robertson

49 Indoor Air Quality C Linear (Temperature) Temperature v. CO₂ CO₂ppm

50 Indoor Air Quality C Temperature 20/01/2014 Linear (Temperature) Temperature v. CO₂ CO₂ppm UCL Energy Institute Seminar 11/11/2014 CIBSE Technical Symposium Craig Robertson crobertson@ahmm.co.uk

51 Indoor Air Quality C Temperature 30/04/ /01/ Linear (Temperature) 22 Temperature v. CO₂ CO₂ppm

52 Indoor Air Quality C Temperature 30/04/ /01/ /07/ Linear (Temperature) 22 Temperature v. CO₂ CO₂ppm

53 Indoor Air Quality Old office New office

54 Indoor Air Quality

55 Thermal Mass

56 Thermal Mass C Working Hours 25 4th Av. Temp 5th Av. Temp 23 R1 Temp /21/14 8:30 7/22/14 8:30 7/23/14 8:30 7/24/14 8:30

57 Thermal Mass C Weekend coolth Working Hours 25 4th Av. Temp 5th Av. Temp 23 R1 Temp /21/14 8:30 7/22/14 8:30 7/23/14 8:30 7/24/14 8:30

58 Thermal Mass C Windows Closed 31 Weekend coolth Working Hours 25 4th Av. Temp 5th Av. Temp 23 R1 Temp /21/14 8:30 7/22/14 8:30 7/23/14 8:30 7/24/14 8:30

59 Thermal Mass C Windows Closed Windows Left Open 31 Weekend coolth Working Hours 25 4th Av. Temp 5th Av. Temp 23 R1 Temp /21/14 8:30 7/22/14 8:30 7/23/14 8:30 7/24/14 8:30

60 Thermal Mass C Windows Closed Windows Left Open 31 Weekend coolth Working Hours Free cooling 4th Av. Temp 5th Av. Temp R1 Temp /21/14 8:30 7/22/14 8:30 7/23/14 8:30 7/24/14 8:30

61 Thermal Mass

62 Lessons

63 Summary Indices Old office New office Summary Comfort Satisfaction

64 What next? Address summer overheating through management, night cooling, some automation?, alerts Indoor air quality in conjunction with above Monitor disaggregated energy uses Server room, lights, PCs, desk fans etc Monitor renewables contribution thermal collectors for DHW Identify a better measure of productivity? Continue to draw on BUS results Challenge design assumption on other projects Comfort envelope, servicing strategies, occupant density etc

65 What next? Address summer overheating through management, night cooling, some automation?, alerts Indoor air quality in conjunction with above Monitor disaggregated energy uses Server room, lights, PCs, desk fans etc Monitor renewables contribution thermal collectors for DHW Identify a better measure of productivity? Continue to draw on BUS results Challenge design assumption on other projects Comfort envelope, servicing strategies, occupant density etc

66 Productivity, investment and energy in a naturally ventilated lean office development Dr Craig Robertson Allford Hall Monaghan Morris Ltd crobertson@ahmm.co.uk Quang Anh Ding UCL BSGS Nic Crawley AHMM Prof. Dejan Mumovic UCL IEDE Ian Fitzpatrick AHMM