In case you missed it !! NuTech gave a presentation at the recent Gas Networks Ireland (GNI) Conference for BER Assessors. The presentation deals mainly with how the NuTech Solar Enhanced Heating and Hot Water system can be used together with a simple and reliable gas boiler system can be used to comply with Part L & achieve an A Rated House. The presentation also gives information on the NuTech Solar Enhanced Ventilation and Hot Water system can be used to satisfy Part L.

1. 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

2. 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

3. Copyright NuTech Renewables 2011
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!

4. 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 ?

5. 0
5000
10000
15000
20000
25000
kWh/Year
House as Designed
Gross Space Heating Load
= 10,000 kWh /yr
House as Built
Gross Space Heating
load
= 20 000 kWh /yr
Solar Contribution
= 5,000 kWh/yr
House as Designed
Net Space Heating Load
= 5,000 kWh/yr
Solar Contribution
= 5,000 kWh/yr
House as Built
Net 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 (£)

6. Copyright NuTech Renewables 2011
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

7. Copyright NuTech Renewables 2011
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

8. Copyright NuTech Renewables 2011
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

9. Copyright NuTech Renewables 2011
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

10. Copyright NuTech Renewables 2011
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.

11. 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

12. Copyright NuTech Renewables 2011
NuTech Pump
Station
Glen Dimplex Smart Rad
Standard Twin Coil Solar Cylinder
300 t0 500 litre capacity
Solar Collectors
NuTech IRES
Controller

13. Copyright NuTech Renewables 2011
Comparison of system efficiencies based on same area of collector

14. Copyright NuTech Renewables 2011
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

15. Copyright NuTech Renewables 2011
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

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

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

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

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

20. Copyright NuTech Renewables 2011
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

21. Solar Enhanced Ventilation & Hot Water
Heats Water
for showers
Heats Ventilation Air
for healthy home
Collects free energy
Computer controlled

22. Copyright NuTech Renewables 2011
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

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

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

25. 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.

26. 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

27. 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/kWh
Night Rate 10.02 c/kWh
Space Heating 217.40€ Avg at 66% Day Rate
Avg 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 987
20% Lower CO2 Emissions
Cost Analysis 7.45 c/kWh
Gas Band D2 7.45 c/kWh
Space Heating 249.28€ Gas Band D3 6.74 c/kWh
Water 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

28. Copyright NuTech Renewables 2011
Thank you for listening………
Bill Quigley
Office in Dublin
Tel: 01 663 63 72
Mobile: 086 88 363 99
e-mail: bill.nutech@gmail.com
www.nutechrenewables.com