1. Date of download: 12/16/2017
Copyright © ASME. All rights reserved.
From: Increasing Efficiency in the Extraction of Solar Heat Stored Underground With Perturb-and-Observe Control
J. Sol. Energy Eng. 2016;139(2): doi: /
Figure Legend:
Block diagram of the heat transfer system

2. Date of download: 12/16/2017
Copyright © ASME. All rights reserved.
From: Increasing Efficiency in the Extraction of Solar Heat Stored Underground With Perturb-and-Observe Control
J. Sol. Energy Eng. 2016;139(2): doi: /
Figure Legend:
Block diagram of the P&O control for the air conditioning prototype

3. Date of download: 12/16/2017
Copyright © ASME. All rights reserved.
From: Increasing Efficiency in the Extraction of Solar Heat Stored Underground With Perturb-and-Observe Control
J. Sol. Energy Eng. 2016;139(2): doi: /
Figure Legend:
Flowchart control of the water pump

4. Date of download: 12/16/2017
Copyright © ASME. All rights reserved.
From: Increasing Efficiency in the Extraction of Solar Heat Stored Underground With Perturb-and-Observe Control
J. Sol. Energy Eng. 2016;139(2): doi: /
Figure Legend:
Temperature in the reference room compared with those of the test room with heat exchange system turned off and the external ambient

5. Date of download: 12/16/2017
Copyright © ASME. All rights reserved.
From: Increasing Efficiency in the Extraction of Solar Heat Stored Underground With Perturb-and-Observe Control
J. Sol. Energy Eng. 2016;139(2): doi: /
Figure Legend:
Action of the P&O control with heat exchange system on (June 5th, 2014)

6. Date of download: 12/16/2017
Copyright © ASME. All rights reserved.
From: Increasing Efficiency in the Extraction of Solar Heat Stored Underground With Perturb-and-Observe Control
J. Sol. Energy Eng. 2016;139(2): doi: /
Figure Legend:
Temperature in the reference room compared with those of the test room without P&O control and the external ambient (Jan. 19th, 2013—summer cooling mode)

7. Date of download: 12/16/2017
Copyright © ASME. All rights reserved.
From: Increasing Efficiency in the Extraction of Solar Heat Stored Underground With Perturb-and-Observe Control
J. Sol. Energy Eng. 2016;139(2): doi: /
Figure Legend:
Temperature in the reference room compared with those of the test room with P&O control on and the external ambient (Oct. 29th, 2014—summer cooling mode)

8. Date of download: 12/16/2017
Copyright © ASME. All rights reserved.
From: Increasing Efficiency in the Extraction of Solar Heat Stored Underground With Perturb-and-Observe Control
J. Sol. Energy Eng. 2016;139(2): doi: /
Figure Legend:
Power of the water pump and fan in the test room (Oct. 29th, 2014—summer cooling mode)

9. Date of download: 12/16/2017
Copyright © ASME. All rights reserved.
From: Increasing Efficiency in the Extraction of Solar Heat Stored Underground With Perturb-and-Observe Control
J. Sol. Energy Eng. 2016;139(2): doi: /
Figure Legend:
Temperature in the reference room compared with those of the test room without P&O control and the external ambient (July 10th, 2013—winter heating mode)

10. Date of download: 12/16/2017
Copyright © ASME. All rights reserved.
From: Increasing Efficiency in the Extraction of Solar Heat Stored Underground With Perturb-and-Observe Control
J. Sol. Energy Eng. 2016;139(2): doi: /
Figure Legend:
Temperature in the reference room compared with those of the test room with P&O control on and the external ambient (June 9th, 2014—winter heating mode)

11. Date of download: 12/16/2017
Copyright © ASME. All rights reserved.
From: Increasing Efficiency in the Extraction of Solar Heat Stored Underground With Perturb-and-Observe Control
J. Sol. Energy Eng. 2016;139(2): doi: /
Figure Legend:
Power of the water pump and fan in the test room (June 9th, 2014—winter heating mode)