0
Research Papers

Exergy Analysis and Sustainability Assessment of a Solar-Ground Based Heat Pump With Thermal Energy Storage

[+] Author and Article Information
Hakan Caliskan1 n2

Department of Mechanical Engineering, Faculty of Engineering, Ege University, TR-35100, Izmir, Turkeyhakan.caliskan@ege.edu.tr; Hakan.Caliskan@uoit.ca

Arif Hepbasli3

Department of Mechanical Engineering, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabiaahepbasli.c@ksu.edu.sa

Ibrahim Dincer

Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, ON, L1H 7K4, CanadaIbrahim.Dincer@uoit.ca

1

On leave from the Department of Mechanical Engineering, Faculty of Engineering, Usak University, TR-64200 Usak, Turkey.

2

Currently working as a Visiting Researcher at the Faculty of Engineering and Applied Science, University of Ontario Institute of Technology (UOIT), 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada.

3

Corresponding author.

J. Sol. Energy Eng 133(1), 011005 (Jan 28, 2011) (8 pages) doi:10.1115/1.4003040 History: Received April 23, 2010; Revised September 13, 2010; Published January 28, 2011; Online January 28, 2011

In this study, both energy and exergy analyses and sustainability assessment of a thermal energy storage system with a solar-ground coupled heat pump installed in a 120m2 house are performed. The actual operating data taken from the literature are utilized for model validation. The system considered here mainly consists of a solar collection system, an underground thermal storage system, an indoor air conditioning system, and a data collection system. First, energy analysis is employed to the system and its components, and the rates of energy input (solar radiation), energy storage, collector heat loss, and other heat loss are found to be 4.083 kW, 1.753 kW, 1.29 kW, and 1.04 kW for a 5 h working time, respectively, while the energy efficiency of the system is calculated to be 42.94%. Exergy analysis of the entire system is then conducted for various reference temperatures varying from 0°C to 25°C with a temperature interval of 5°C. As a result of this analysis, the rates of the maximum exergy input, exergy storage, and exergy losses are determined for a reference temperature of 0°C to be 0.585 kW, 0.24 kW, and 0.345 kW, respectively. Finally, the maximum exergy efficiency of the system is obtained to be 40.99% and the maximum sustainable development using sustainability index, which is a function of exergy efficiency, is calculated to be 1.6946 for a reference temperature of 0°C. Furthermore, the energy and exergy results are illustrated through Sankey (energy flow) and Grassmann (exergy loss and flow) diagrams.

FIGURES IN THIS ARTICLE
<>
Copyright © 2011 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

A schematic layout of the system (modified from Ref. 25)

Grahic Jump Location
Figure 2

The configuration of the system (modified from Ref. 4)

Grahic Jump Location
Figure 3

Main components of a general TES system

Grahic Jump Location
Figure 4

Energy flow (Sankey) diagram

Grahic Jump Location
Figure 5

The effects of operation period on the performance of thermal storage

Grahic Jump Location
Figure 6

The effect of the ground inlet temperature on the performance of thermal storage

Grahic Jump Location
Figure 7

Exergy changing with various reference temperatures

Grahic Jump Location
Figure 8

Exergy efficiency and sustainability index with various reference temperatures

Grahic Jump Location
Figure 9

Magnitudes of the exergy losses due to irreversibilities

Grahic Jump Location
Figure 10

Exergy loss and flow (Grassmann) diagram for T0=0°C

Grahic Jump Location
Figure 11

Comparison of percentage of energy and exergy (T0=0°C) magnitudes

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In