This document provides an example of designing a renewable energy system for a house in Derby, UK. It outlines evaluating the available energy resources, determining the load profile, and sizing the solar system. Weather data is accessed from a NASA website. Diagrams show average winter and summer solar radiation levels in Derby. Excel is used to calculate the energy demand and size the solar thermal system to meet hot water needs. A solar collector area of 6 square meters is determined to be sufficient.

1. derby.ac.uk
Tugba Gurler
t.gurler@derby.ac.uk
s
7TE507 - Environmental
Risk and Responsibility

2. derby.ac.uk
2
SOLAR SYSTEM DESIGN EXAMPLE
Q
- The following example covers the design of a renewable generation system for a House located in Derby, United
Kingdom.
The example includes the evaluation of the available
- Energy resources
- Simple determination of the required load profile,
- Simple sizing of the system

3. derby.ac.uk
SITE SPECIFICATIONS AND LOCATION OF BUILDING
The energy-efficient house living 4 members inside is intended to be
part of A38 Street Extension near to the Markeaton Street Campus in
the University of Derby, Derbyshire, located in the East Midlands of
England
- Please note that the figures in the example have been manipulated
so that you can see that the real numbers can be calculated by you
under real conditions.

4. derby.ac.uk
ACCESS WEATHER DATA:
There are many webpage available online, one of the main Source;
• - https://power.larc.nasa.gov/data-access-viewer/

5. derby.ac.uk
DERBY WINTER RADIATION DIAGRAMS

6. derby.ac.uk
DERBY SUMMER RADIATION DIAGRAMS

7. derby.ac.uk
DERBY
RADIATION ON
THE ROOF
0
50
100
150
200
250
300
350
400
450
500
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Wh/m2
Hours of the Day
Radiation Level
Winter Average Summer Average

8. derby.ac.uk
SOLAR SYSTEM DESIGN EXAMPLE
This example includes the excel simple calculations. You can use any software available in the University if
you prefer to do it. The Solar system sizing software available online of in the Uni;
- IES - Integrated Environmental Solutions
- PV Sol
- RET Screen
- Design Builder ( Check with IT if it is available)

9. derby.ac.uk
SCENERIO DESCRIPTION
The hot water demand is assumed 25 litres in winter condition and 20 litres in summer
condition at 60 C based on the guidance of project assignment.
The weather condition in Derby is considered 18 C constant temperatures in summer and 12 C
constant temperatures in winter

10. derby.ac.uk
ENERGY DEMAND

11. derby.ac.uk
SELECTED SOLAR
COLLECTOR

12. derby.ac.uk
SOLAR THERMAL SIZING

13. derby.ac.uk
SOLAR THERMAL SIZING

14. derby.ac.uk
SOLAR THERMAL SIZING

15. derby.ac.uk
SOLAR THERMAL SIZING

16. derby.ac.uk
SOLAR THERMAL SIZING

17. derby.ac.uk
SOLAR THERMAL SIZING

18. derby.ac.uk
COLLECTOR AREA

19. derby.ac.uk
CALCULATIONS: HEAT DEMAND

20. derby.ac.uk
SOLAR THERMAL SIZING
As an example between 12.00-13.00 pm in winter condition absorbed solar radiation can be calculated.

21. derby.ac.uk

22. derby.ac.uk

23. derby.ac.uk
THERMAL SIZING

24. derby.ac.uk
SOLAR THERMAL DESIGN
• It is important to understand the main substantial requirements of designing a solar
• thermal system.
• The main components of the system are
- Solar collector,
- Thermal transfer liquid which is water in this design
- Pumps circulating the heated thermal water from the solar collector thorough to the water tank
- Reheating the cooled water coming from the collectors

25. derby.ac.uk
THERMAL SIZING
• The area will be calculated based on the
- Average efficiency,
Which is 0.5 in this example
-Winter condition demand in this example;
Which is 20,15 Mj
- Total daily Solar radiation: 9.25 Mj/m2
Ac= 6 m2