2050 Now! Achieving the standards for 2050, and the potential role for innovative heating solutions in thermally improved homes
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as PDF The project will be improving four homes to different levels and exploring the performance of new heating solutions to achieve the optimum balance of energy performance vs. heating input for these different technologies. The three main innovative heating technologies in this project are Baxi's Ecogen domestic CHP (dCHP), Baxi's Ambiflo ASHP and Nuaire's Sunwarm (combined positive input ventilation, solar thermal heating and solar hot water). The dCHP units will be installed in relatively worse performing households and the ASHP units in well insulated houses to understand the level of performance needed from homes to create the right environment for these technologies to achieve significant carbon savings.
Retrofit for the future ZA556B
2050 Now! Achieving the standards for 2050, and the potential role for innovative heating solutions in thermally improved homes : Project images
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Energy and fuel use
Measured data from renewable generation is not yet available.
Fuel use
| Pre-development | Forecast | Measured | |
| Electricity use | 17487 kWh/yr | 3717 kWh/yr | - |
|---|---|---|---|
| Natural gas use | 964 kWh/yr | 482 kWh/yr | - |
| Oil use | - | - | - |
| LPG use | - | - | - |
| Wood use | - | - | - |
| house coal | 10035 kWh/yr | - | - |
| Pre-development | Forecast | Measured | |
| Primary energy requirement | 683 kWh/m².yr | 121 kWh/m².yr | - |
|---|---|---|---|
| Annual CO₂ emissions | 176 kg CO₂/m².yr | 28 kg CO₂/m².yr | - |
| Annual space heat demand | - | 64 kWh/m².yr | - |
Renewable energy
| Electricity generation | Forecast | Measured |
|---|---|---|
| PV | 1595.199951 kWh/yr | - |
| Other Renewables Tech | - | - |
| Electricity consumed by generation | - | - |
| Primary energy requirement offset by renewable generation | 72 kWh/m².yr | - |
| Annual CO₂ emissions offset by renewable generation | 16 kg CO₂/m².yr | - |
Calculation and targets
| Whole house energy calculation method | SAP |
|---|---|
| Other whole house calculation method | - |
| Energy target | Retrofit for the Future |
| Other energy targets | - |
| Forecast heating load | - |
Airtightness
| Date | Result | |
| Pre-development air permeability test | - | - |
|---|---|---|
| Final air permeability test | - | - |
Project description
| Stage | Under construction |
|---|---|
| Start date | 01 March 2010 |
| Occupation date | 31 May 2010 |
| Location | Newark Nottinghamshire England |
| Build type | Refurbishment |
| Building sector | Public Residential |
| Property type | Semi-Detached |
| Construction type | Masonry Cavity |
| Other construction type | |
| Party wall construction | |
| Floor area | 81.4 m² |
| Floor area calculation method | Treated Floor Area (PHPP) |
| Building certification |
Project Team
| Organisation | Nottingham Community Housing Association |
|---|---|
| Project lead person | Nottingham Community Housing Association |
| Landlord or Client | Nottingham Community Housing Association |
| Architect | |
| Mechanical & electrical consultant | |
| Energy consultant | Camco |
| Structural engineer | |
| Quantity surveyor | |
| Consultant | Parity Projects |
| Contractor | Baxi, Nuaire, NCHA's own contractors |
Design strategies
| Planned occupancy | Three people |
|---|---|
| Space heating strategy | Air source heat pump with radiators will be installed in the main house with advanced measures (2050 house) and another property with medium measures. The two other houses will be installed dCHP units. On the superhouse, Sunwarm will also be contributing to space heating. |
| Water heating strategy | Water heating will be provided by the Sunwarm system, feeding hot water to the house through the solar panels. |
| Fuel strategy | Mains Electricity for properties with ASHP and Mains Gas for the properties with dCHP. |
| Renewable energy strategy | 2 kWP PV panels to be installed in the 2050 house in the south facing roofs. |
| Passive Solar strategy | The properties have south facing windows. In addition, the superhouse with the Sunwarm system will be collecting heat from the solar panels on the roof. |
| Space cooling strategy | Natural ventilation in all properties and Sunwarm in the super house supplying continuous filtered fresh air during day. On warm nights SUNWARM will either supply air in a similar way to a warm day or if more advantageous will pass the outside air through the solar collectors providing low energy air cooling to the property. |
| Daylighting strategy | Large windows |
| Ventilation strategy | Sunwarm will be providing ventilation throughout the year. Natural ventilation can also be used during summer. |
| Airtightness strategy | Reducing air-tightness down to 3. Experience from other projects shows that this is achievable. The pressure tests will be run in conjunction with the measures to ensure that the target figure is achieved. |
| Strategy for minimising thermal bridges | All junctions will be assessed during internal wall insulation. |
| Modelling strategy | NHER SAP software was used to model the different measures through collaborating with suppliers and feeding in information to the software regarding the performance of the different measures. The unregulated emissions were modelled through the SAP extension worksheet provided by TSB. |
| Insulation strategy | - Application of solid wall insulation (Spacetherm) to achieve u-value of 0.24. - Loft insulation (u-value: 0.13) - Solid floor insulation (u-value: 0.4) |
| Other relevant retrofit strategies | The planned measures will be installed whilst the properties are void and in a particular sequence to avoid to additional costs. |
| Contextual information |
Building services
| Occupancy | NULL |
|---|---|
| Space heating | NULL |
| Hot water | NULL |
| Ventilation | NULL |
| Controls | NULL |
| Cooking | NULL |
| Lighting | NULL |
| Appliances | NULL |
| Renewable energy generation system | NULL |
| Strategy for minimising thermal bridges | NULL |
Building construction
| Storeys | 0 |
|---|---|
| Volume | - |
| Thermal fabric area | - |
| Roof description | NULL |
| Roof U-value | 0.00 W/m² K |
| Walls description | NULL |
| Walls U-value | 0.00 W/m² K |
| Party walls description | NULL |
| Party walls U-value | 0.00 W/m² K |
| Floor description | NULL |
| Floor U-value | 0.00 W/m² K |
| Glazed doors description | NULL |
| Glazed doors U-value | 0.00 W/m² K - |
| Opaque doors description | NULL |
| Opaque doors U-value | 0.00 W/m² K - |
| Windows description | NULL |
| Windows U-value | 0.00 W/m² K - |
| Windows energy transmittance (G-value) | - |
| Windows light transmittance | - |
| Rooflights description | NULL |
| Rooflights light transmittance | - |
| Rooflights U-value | 0.00 W/m² K |