Extension of energy-utilisation diagram to power availability for exergy loss analysis
by Winit Bouapetch; Pongsiri Tungwungwiwat; Thongchai Srinophakun
International Journal of Exergy (IJEX), Vol. 12, No. 3, 2013

Abstract: Energy-Utilisation Diagram (EUD) has been used to identify exergy loss in general process units, whereas Power Availability Diagram (PAD) provides the difference between exergy changes of two pressure exchangers. Two modifications of the original PAD are proposed for better exergy loss visualisation. Firstly, the energy donor curve is shifted to the location of energy acceptor. Secondly, arrows indicating the exergy change direction are inserted in the diagram. This research leads to Modified Power Availability Diagram (MPAD) that can identify the exergy loss. From the applied Rankine cycle, MPAD was changed in two forms as MCPAD (Modified Cycle Power Availability Diagram) and MSPAD (Modified Subsystem Power Availability Diagram). The results showed that MPAD can presents the exergy profile of the working fluid and MSPAD can reduce the complexity of EUD and show the exergy loss of each unit in the cycle. The advantages of MCPAD can present the graphical exergy distribution.

Online publication date: Thu, 23-May-2013

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Exergy (IJEX):
Login with your Inderscience username and password:

    Username:        Password:         

Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com