3 Scottish Case Studies
During our project we undertook monitoring at 3 different properties all with the Sanyo Eco-cute system. Below is a brief outline of each of the properties and the heat pump system within each of these dwellings.
Athelstaneford
Monitoring carried out between 03/02/2011 - 10/02/2011
- End Terrace bungalow
- Roof and wall cavity insulation
- 9KW Heat pump
- Space heating provided by radiators
- Minimal DHW draw from tank
- Single occupant
- Swedish designed HW tank
Oban
Monitoring carried out between 15/02/2011 - 22/02/2011
- Stand-alone bungalow
- New build
- Roof, floor and wall insulation
- 9KW Heat pump
- Space heating provided by underfloor heating
- High DHW draw from tank
- Two occupants
- Swedish designed HW tank
Ballencrief
Monitoring carried out between 30/02/2011 - 06/03/2011
- Stand-alone bungalow
- Roof and wall insulation
- 2 x 9KW Heat pumps
- Space heating provided by low-mass flow radiators
- High DHW draw from tank
- Family
- Double skinned hot water tank
The heating systems have a number of pre-installed settings. One of these allows the user to set the temperature of the flow in the heating in accordance to the outside temperature. In the system there exists a number of pre-set heating curves and the user selects what temperature they would like the heating to flow at when the outside temperature is -15oC. The diagram below shows these pre-set heating curves installed in the system.
The top red line represents the houses at Athelstaneford and Ballencrief set to 55oC when the outside temperature is -15o. The bottom red line represents the house at Oban set at 45oC.
Some periods are also specified for the operation of the system:
- Athelstaneford: operation from 6am to 12am and from 16pm to 23pm
- Oban: operation from 5am to 23pm
- Ballencrief: operation from 6am to 24pm
All of the properties used the Sanyo Eco-cute heat pump
The third property at Ballencrief used two 9KW heat pumps running in parallel
The main difference in the house at Ballencrief is that they are using a different storage tank to that recommended by Sanyo
Hot water tank at Oban and Athelstaneford
- 227 litres
- Domestic hot water is stored and heated in the coiled pipe on the inside of the tank
- Water used in radiators and underfloor for space heating is stored and heated in the main body of the tank
- This is how the DHW and the water used for space heating are kept separated
- This is the tank recommended by Sanyo.
- More information on the Sanyo Eco Cute system available here
Hot water tank at Ballencrief
- 240 litres
- Domestic hot water is stored and heated in the inner cylinder of the tank - 164l
- Water used in radiators and underfloor for space heating is stored and heated in the outer cylinder of the tank - 76l
- This is how the DHW and the water used for space heating are kept separated
- More information on this tank available here
Monitoring Data
The monitoring data collected from the three installations can be downloaded below:
- Monitoring data from the installation inAthelstaneford (close to Haddington). The monitoring over the week has been realized in two parts:
Data Athelstaneford
(haddington1) Part1
Data Athelstaneford
(haddington1) Part2
- Monitoring data from the installation in Oban:
Data Oban
- Monitoring data from the installation in Ballencrief (close to Haddington):
Data Ballencrief
(haddington2)
- An spreadsheet with the data of the installations in Athelstaneford and Oban with an analysis:
Analysis Data
Athelstaneford and Oban
