Reducing your Total Building Emissions using High Efficiency Energy Recovery :

Transcription

1 Reducing your Total Building Emissions using High Efficiency Energy Recovery : By Duncan Goodall and James Fisher duncan.goodall@flaktwoods.com/james.fisher@flaktwoods.com Mobile Duncan: James:

2 e 3 Topics for Today Topics covered within this CPD Module are listed below: Factors effecting Building Services Engineers and Manufactures Legislation Current and Future Part L 2013 Why Energy Recovery Ventilation and not Heat Recovery Ventilation Methods of Energy Recovery Typical Example Medium Efficiency vs High Efficiency ERU Current Trends Be Lean, Clean and Green School Case Study

3 e 3 External Factors effecting Building Designers? Health Benefits Building Compliance Client Expectations/Planning Part L Min Heat Recovery 50% BREEAM Sustainability Global warming Part L Max SFP Renewables Rising cost of energy Be Lean, Be Clean, Be Green Generally keeping ahead of changes in legislation

4 e 3 External Factors effecting Manufactures ErP 2015 compliance Energy Labelling Part L SFP s Certification Regulation Commercial Aspects Trade Associations, Authorities EUROVENT, BISRIA, CIBSE Research + Development

5 e 3 co Why is HRV required? The main reasons for using HRV include:- Required by UK Building Regulations (Part L2 2010) and 2013 Saving Energy Reduces Building Running Costs, this being one of the MAIN reasons why its popular Delivers a Reduced Carbon Footprint for the building Allows some clients to show their green credentials

6 e 3 co Be Lean, Be Clean, Be Green The Be Lean, Be Clean, Be Green principle is as taken from the London Mayor's Energy Hierarchy approach as outlined within the Greater London Authority London Plan. Priority 1 - Be Lean - Use less energy (efficient building design and efficient building services Where you would select energy recovery units) Priority 2 - Be Clean - Supply energy efficiently (through the use of decentralised energy, i.e utilise CHP feeding district heating/cooling) Priority 3 - Be Green - Use renewable energy

7 e 3 co The London Plan The London Plan 2011 has set out the following objectives, CO2 reductions over Part L: % from 2011, 40% from 2013, Zero Carbon from 2016

8 e 3 co Why Energy Recovery Ventilation and not Heat Recovery Ventilation? HRV Heat Recovery Ventilation, is aimed at SAVING HEAT by recovering heat within the air that would otherwise be discharged outside. ERV Energy Recovery Ventilation, is aimed at SAVING HEAT AND COOLTH, and the energy required to produce it in a building.

9 e 3 co Methods of Energy Recovery Typical Energy Recovery Devices Thermal Wheel Air Volumes >1.5m3/s Typically 85% Plate Heat Exchanger Air volumes <5m3/s Typically 50-95% Run- Around Coil Air Volumes >2m3/s Typically 45%

10 e 3 co Cross flow v Counter flow Energy Recovery Devices for Compact Units Cross Flow typically 50% efficient Counter Flow typically 85% efficient Medium efficiency High efficiency Typically manufactured from Paper/Polyproperline/Aluminium

11 e 3 co Why is a counter flow core high efficiency? Simple - Longer air paths = Greater Energy Transfer

12 e 3 co Medium Efficiency vs High Efficiency Energy Recovery Based on an air volume of 1000l/s: Inlet Air Temp -5 C Return Air Temp 22 C Inlet Air Temp -5 C Return Air Temp 22 C Conditions based on CIBSE Guide B Supply Air Temp 10 C Supply Air Temp 19.5 C

13 e 3 co Current Trend Part L 2010 BREEAM Renewables Client Expectations Sustainability Renewables before Ventilation

14 e 3 co The Integrated Reusable Approach Be Lean, Clean, Green BREEAM Excellent Building Faster Payback Design choice Renewables after Ventilation

15 e 3 co Case Study Existing School Building Building: 8 Class Rooms 1 ERU serves 4 Class Rooms, total 2 ERU s Small Kitchen/Servery BB101 Specification Maximum airflow 8 l/s pp 30 People per Class Room CO 2 Demand control Part L 2010

16 e 3 co Building Benchmark: NO HEAT RECOVERY

17 e 3 co Medium Efficiency Energy Recovery Unit : 50%

18 e 3 co High Efficiency Energy Recovery Unit : 85%

19 e 3 co Summary

20 e 3 co Case Study Payback Medium Efficiency Pay Back (Years) High Efficiency Pay Back (Years) BENCHMARK BENCHMARK

21 e 3 co What does this mean for Buildings?

22 e 3 co Current Product Overview >90% ENERGY RECOVERY UNIT Compact & Self-regulating High efficiency Plate Exchanger >90% Energy saving Uses EC Motors Plug & Play Solution Indoor or outdoor installation Side-by-Side or Double Deck format Up to 1.33 m 3 /sec (4800 m 3 /hr) Full BMS communication (Modbus) COUNTERFLOW HIGH EFFICIENCY SYSTEMS

23 e 3 co Energy Recovery Units ANY QUESTIONS????