Proceedings of the 6th New Zealand Geothermal Workshop 1985. Rotorua geothermal task force : preliminary investigations. New Zealand Geothermal Workshop [7-9 Nov. 1984, New Zealand].

Drew, Stephen R.

[1984]

CIENA
171

0-86869-056-2

A geothermal Task Force field team has been established in Rotorua to investigate urgently ways of reducing the wastage of geothermal energy. The existing level of fluid withdrawal from the Rotorua field has been confirmed to be around 32.000 t/d (tonnes/day) from 350 medium enthalpy bores. The reasons for the wastage have been identified and current technology could be used to reduce substantially the overall withdrawal. However major modifications will be required and this will cost several millions of dollars for new reticulation piping, thermal insulation, new heat exchangers and control devices. There is not a simple and cheap way of significantly reducing the drawoff and satisfying the current heating requirements. It is also likely that most of the low pressure bores will not self-flow at reduced flowrates as their production is already throttled so increased bore-sharing or group heating looks like being an essential part of the future geothermal development in Rotorua. Downhole heat exchangers could also have a role to play.

Presenta diagrs. y gráfs.

NUEVA ZELANDIA; ENERGIA GEOTERMICA; CAMPOS GEOTERMICOS; POZOS GEOTERMICOS; PERDIDAS DE CALOR; INTERCAMBIADORES DE CALOR; INVESTIGACION;