The thermal effects of some control logics used in GDHS

KÜÇÜKA M. S.

APPLIED THERMAL ENGINEERING, vol.27, pp.1495-1500, 2007 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 27
  • Publication Date: 2007
  • Doi Number: 10.1016/j.applthermaleng.2006.09.025
  • Journal Name: APPLIED THERMAL ENGINEERING
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1495-1500
  • Keywords: district heating, geothermal heating, balcova GDHS
  • Dokuz Eylül University Affiliated: No

Abstract

The temperature of the water returning from the network affects greatly the efficiency of a geothermal district-h eating system (GDHS). The temperature of the returning water depends on whether there is a heat exchanger between network flow and indoor circulation. The return temperature also depends on outdoor temperature and logic of the indoor temperature control system. In this paper, four control logics are defined depending on whether indoor circulation is separated from network circulation or not. Return temperature and circulation rate of network flow are calculated for these control logics. The results show that the flow rate of the network flow and annual consumption of the geothermal fluid could be decreased about 10% or over by using optimum control logic in district heating systems. (c) 2006 Elsevier Ltd. All rights reserved.