Gas Networks Ireland Technical Presentations- Part L

Copyright NuTech Renewables 2011

Presentation for the GNI Conference for BER Assessors

Dublin – 19th October 2016

Building Cost-Effective Sustainable Houses that

comply with TGD L – 2011

Bill Quigley NuTech Renewables Ltd

Passive Solar Housing using Solar Collectors 1983 – 1988 The Knocklyon Project Designers: Bill Quigley / Mark Forkin (Directors of NuTech Renewables)

Solar Roof – 40m2 of Air Solar Collector All fabric reasonably well insulated for the time Wall = 0.35; Floor 0.25 Roof = 0.20; Windows = 3.0 W.m2.K Tested numbers of different technologies – Rock Bed Heat Stores, Phase Change Heat Stores, Heat Pumps, etc.

Space heating – 40 kWh/m2.year and reduced to 20 kWh/m2.year with best technologies


Some of the Findings from the Knocklyon Project • Levels of Ground Floor Insulation – B Regs changed

• Thermal Bridging was eventually taken account of in the B Regs

• Air Tightness testing is now mandatory – probably the 1st Blower Door test in Ireland – initial results were interesting! • A simple HRV system was tested

• Rock bed heat storage? Phase Change material heat storage

• Air-to-Air Heat Pump – solar assisted

• Partial fill cavity wall insulation was a disaster!

Partial Fill Cavity Wall Insulation Effective Insulation ??? Cavity Wall Thermal Looping

Outside 0 DegC 0 C

Inside 20 DegC 20 C

Calculated U-Value = 0.45

Actual U-Value = 0.9 ?

0

5000

10000

15000

20000

25000

kWh

/ Yea

r

House as DesignedGross Space Heating Load = 10,000 kWh /yr

House as BuiltGross Space Heating load = 20 000 kWh /yr

Solar Contribution = 5,000 kWh/yr

House as DesignedNet Space Heating Load= 5,000 kWh/yr

Solar Contribution = 5,000 kWh/yr

House as BuiltNet Space Heating Load= 15,000 kWh/yr

Importance of Build Quality

By Doubling the Energy Demand in reality We can Triple the actual running costs (£)


There has been rapid change in the requirements for complying with TGD L in the

years 2005 to 2011

The new 2011 Regulations now require energy performance that is some 60% better than was

required in the 2005-06 Regulations


The 2011 Regulations The 2011 Regs demands a CPC of 0.46 i.e. 54% better than the Reference House It also has to achieve an EPC of 0.4 i.e. 60% better than the Reference House It must also meet with the Renewable Energy Contribution of 10kWh/m2.year To satisfy all of these requirements is difficult BUT Various techniques have proved most useful


The 2011 Regulations First efforts were to add very high levels of insulation: Add a solar water heater also – still does not meet the EPC requirements


Insulation, Ventilation and Solar Thermal Energy World Sustainable Energy Conference – Feb 2014

1. Use Economic Levels of Insulation

2. Curiously South facing glazing should be double glazed

and North facing glazing should be triple glazed!

3. Get the house reasonably airtight! Probably between 1 and 2 Air Changes per hour at 50 Pascal

4. Ventilate the house in an economic way!

5. Use large arrays of solar thermal collectors to deliver solar energy into the house for space and water heating


NuTech has developed and patented a technology known as the NuTech Solar Enhanced Heating and Hot Water system This system can quadruple the amount of solar energy delivered to the house when compared to a standard Solar Water Heater. It does this by effectively using a larger solar array and a slightly larger solar cylinder.

Solar Enhanced Heating & Hot Water

Heats Hot Water Cylinder

Fan Coil Radiator heats house with energy from the solar array

Collects free energy

Computer controlled

Presenter

Presentation Notes

olled


NuTech Pump

Station

Glen Dimplex Smart Rad

Standard Twin Coil Solar Cylinder 300 t0 500 litre capacity

Solar Collectors

NuTech IRES Controller


Comparison of system efficiencies based on same area of collector


The patented plumbing arrangement with the motorised valves and the electronic control system are fitted adjacent to the hot water cylinder

The NuTech Solar Enhanced Heating and Hot Water technology that interlinks solar collectors, hot water cylinders and house heating

The IRES control box with the Consumer Display Unit attached and adjacent to the plumbing control board


Solar Enhanced Heating and Hot Water

Linked to the Intelligent Renewable Energy System (IRES) controller Manufactured by NuTech

Note:

This unit allows the home occupier to know what the system is doing. The control of the system is fully automatic and no decision making is required of the home occupier

The following slides show the typical flow schematic of the Solar Enhanced Heating system with a Smart Rad delivering energy to the house

Solar Enhanced Heating - Flat Plate Collectors: Flow Diagram – Sunny Winter Day

Solar Enhanced Heating - Flat Plate Collectors: Flow Diagram – Cloudy Winter Day

Solar Enhanced Heating - Flat Plate Collectors: Flow Diagram – Winter Night


With this Technologies you can:

• Build with easily achievable U-values in floors, walls, roof and windows and using standard construction methods

• Use a gas or oil fired boiler with radiators or underfloor heating

• Use a balanced flue gas fire or a glass fronted log stove

• Satisfy the EPC, CPC and Renewable Energy Requirement as

set out in Part L

• Deliver up to four times the amount of solar energy to the house when compared to a standard solar water heating system

All this in a single tried and tested affordable package

Solar Enhanced Ventilation & Hot Water

Heats Water for showers

Heats Ventilation Air for healthy home

Collects free energy

Computer controlled

Presenter

Presentation Notes

olled


Solar Enhanced Ventilation

Get a large area of flat plate solar collectors on the roof Connect this array to the DHW Cylinder and the Air Handling Unit Air Extract from house by way of the airing cupboard and fresh air connected to AHU (this dries clothes in the airing cupboard quickly and reliably) Warm PIV ventilation air fed to the 1st floor and the ground floor

Solar Air Heating using Flat Plate Collectors: Flow Diagram – SUNNY WINTER DAY

Technical Conclusions: 1. Doubling the area of collector does not double the cost of a Solar Heating system – the pump

station, pipework, cylinder, controller and installation costs are all common

2. Doubling the area of collector on a standard Solar Water Heating system only results in a marginal increase in energy delivered to the house. This is because there is no way of storing or using the extra energy

3. By doubling the area of solar collector with the Solar Enhanced Heating and Hot Water technology we have a system that can absorb the extra solar energy throughout the days of autumn, winter and spring

4. Warming the house air holds the solar collector system efficiency in excess of 60% throughout all of the day

5. Doubling the area of solar collector with a larger hot water cylinder gives the best results in terms of both Energy and CO2 savings

6. Using this Solar Enhanced Heating system is the best way of utilising low grade solar energy and delivering it as useful heat to the house

7. Having the larger solar cylinder is a good way of storing solar energy for evening use. The NuTech system takes the energy out of the solar cylinder in the evening and delivers energy to the house. It is entirely separate to the heating system of the house.

Technical Conclusions (Cont’d) 8. Delivering solar energy to an underfloor heating system is not nearly as efficient as

the SEV-PIV system. As soon as the heating system comes on the solar underfloor is switched off

9. The SEV – PIV technology makes the much lower cost flat plate collector as efficient as the expensive evacuated tube collector

10. In light cloudy weather the SEV – PIV system continues to deliver solar energy to the house. In these conditions the standard Solar Water heating system is off

11. Ventilation is necessary. It causes as much energy use as the energy required to combat heat loss through the fabric

12. By adding the NuTech SEV – PIV system with 5 Flat Plate collectors and a new larger hot water cylinder we can deliver in excess of 6,000 kWh to the house

13. This is 4X the amount of energy that would be delivered by a standard solar water heating system

14. This well ventilated house is a warm, comfortable, healthy house free from condensation and mould growth

Comparison 3/4 Bed Semi-Detached - Heat Pump Vs Gas-Nutech system

Heat Pump

Energy Calc based on SEAI model kWhs per year CO2 (kg/year) CPC EPC

Space Heating 1220 637 0.418 0.397

Hot Water 1157 604

Total CO2 per year 1241

Cost Analysis 17.82 c/kWh Day Rate 21.83 c/kWhNight Rate 10.02 c/kWh

Space Heating 217.40€ Avg at 66% Day RateAvg cost for electricity = 17.82 c/kWh

Water Heating 206.18€

Total Cost per year for Heat P 423.58€

NuTech Solar Enhanced Heating

Energy Calc based on SEAI model kWhs per year CO2 (kg/year) CPC EPC

Space Heating 3346 680 0.368 0.397

Hot Water 1510 307

Total CO2 per year 98720% Lower CO2 Emissions

Cost Analysis 7.45 c/kWh

Gas Band D2 7.45 c/kWhSpace Heating 249.28€ Gas Band D3 6.74 c/kWhWater Heating 112.50€

Total Cost per year for Gas / 361.77€ 15% Lower Running Costs than the Heat Pump system

NuTech Solar Enhanced Heating - Actual Case

Energy Calc Based on experimentation and University of Ulster Tests

Space Heating 2406

Hot Water 1510

Cost Analysis 7.45

Space Heating 179.25€

Water Heating 112.50€

Total Cost per year for Gas / 291.74€ Actual Case will be 31% Lower Running Costs than the Heat Pump system


Thank you for listening……… Bill Quigley Office in Dublin Tel: 01 663 63 72 Mobile: 086 88 363 99 e-mail: [email protected] www.nutechrenewables.com

Gas Networks Ireland Technical Presentations- Part L

Engineering

Transcript of Gas Networks Ireland Technical Presentations- Part L