RDPCLEVS Lowenergy wholehouse ventilation system

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RDPCLEVS Low-energy whole-house ventilation
system

• European Commission 5th Framework RTD

• Project Coordinator
• Martin Centre University of Cambridge
• Research Partners
• Energy Research Group University College Dublin
• Titon Hardware Ltd. UK
• FLOP System s.c. Poland
• Cenergia Energy Consultants Denmark
• Dansk Boligselskab - Denmark

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Project Overview

• Research project based on field studies
• Not a demonstration project

• Started 1st May 2001 (3 year duration)
• House survey and remedial work - October 2001
• Addresses the (health v energy) issue
• Increasing airtightness standards
• Occupant comfort

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Low-energy whole-house ventilation system

• Passive stack ventilation - (PSV)
• No energy penalty
• Building Regulations
• Pressure dynamics
• Regulated flow supply air windows
• Preheated ventilation air
• Heat reclaim device
• Passive solar device

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Regulated flow supply air window
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BRE Test Cell Dynamic Summer Performance

• Effective U-value includes solar input.
• Dips high solar irradiation.
• Max. night time U-value 0.4 W/m2K
• Estimated gt 90 reduction in kWhrs
  lost/year/window.
• Simple, controlled ventilation regime of test
  cell !

Net heat flow through window over 10.5 days
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Additional innovative features

• Manual override, automatic (temperature cycle)
  reset, pressure controlled window vents.
• Integrated sound attenuating perforated film,
  micro-perforated absorber stretched parallel to
  air path. (15-20 dB reduction)

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Test Houses

• Matched pair houses (2 storey, mid-terrace)
• Fabric insulation to current Building Regulations
  (min.).
• Envelope airtightness to be optimised
• build tight ventilate right
• Both houses to be brought to identical thermal
  performance.

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Field Study

• Test house pressurisation tests
• Room temperatures and airflow characterised using
  moveable array and window fitted sensors
• Data downloaded fortnightly during monitoring
  periods
• Houses to be unoccupied for maximum of 21
  months
• Occupied monitoring period of 4 months, toward
  end of project

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Workpackages

• WP1 Test house construction drawings and
  specification, with additional survey information
  (thermographic and heat flux tests). Pressure
  testing.
• Expected result Optimised design of house and
  psv ventilation system.

• WP2 Pressure testing and remedial work.
  Moveable arrays and monitoring equipment to be
  installed in test houses
• Expected result Pre-installation data complete

• WP3 Delivery of completed windows and passive
  stack vent systems
• Expected result Optimised design of house and
  ventilation system.

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Workpackages contd

• WP4 Install and commission windows, psv and
  extract fans (in control houses). Pressure
  tests, tracer gas/CO2 decay tests.
• Expected result Test dwellings complete

• WP5 Commission and test monitoring equipment.
  finalisation of monitoring regime.
• Expected result Proof of system effectiveness

• WP6 Monitoring periods (as per barchart).
• Expected result Completed data collection

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Workpackages contd

• WP7 Data analysis and occupant surveys.
• Expected result Proof of system effectiveness

• WP8 Dissemination in each country (to include
  Northern Ireland) through publications,
  conferences and web-site setup and hosted by
  Energy Research Group.
• Expected result Proof of system effectiveness