The production department performed well during the year, and there were few downtime incidents. The operation of the geothermal systems remained consistent with prior years.
- The net extraction at Svartsengi was approximately 5,59 million tonnes, representing a decrease of around 16,6% due to increased re-injection of run off water.
- The net extraction in Reykjanes was approximately 13,733 million tonnes, representing a decrease of around 0.356%.
- Electricity production at Svartsengi was 551.6 GWh, which is an increase of around 3.61% between years.
- Electricity production in Reykjanes was 786 GWh, a decrease of around 3.93% between years.
- The total production of the two power plants decreased by approximately 0.934% between years.
Increase in electricity production at Svartsengi
Hot water production at Svartsengi in 2014 was 2.41% less than the prior year.
Table 2 shows an overview of the hot water production.
Hot water production
||Avarage flow l/s
||Energy content GWh
|Production hot water 2014
||All year 2014
|Maximum monthly production
|Maximum weekly production, sales
||Week 51 (13. til 20. dec.)
|Maximum 24-hour production
||18. dec. 2014
|Maximum production per hour, l/s
||kl 14:00-15:00 18. dec. 2014
|Maximum production per hour, MW
||kl 00:00-01:00 13. dec. 2014
It should be noted that the installed production capacity is 465 l/s. This means that approximately 103.45% of productivity was achieved during the cold snap on 18 December. No significant changes have been found in the chemical composition of the hot water distributed by HS Veitur to the Suðurnes region from the reservoirs of HS Orka.
HS Orka’s cold water production to HS Veitur totaled 6,131,832 m3.
15,4 million tonnes
Extraction from the geothermal area at Svartsengi was approximately 488 kg/s on average, or a total of 15,4 million tonnes an increase of 6,9%.
Re-injection of runoff water into deep wells SVAH-17 and -24 was around 9.8 million tonnes, which corresponds to approximately 311 kg/s on average over the year. Re-injection increased by approximately 27.5% during the year with the implementation of an additional main pipeline and a new pumping station.
Geothermal Production in the Reykjanes area
Net extraction during the year
5,59 m. tonnes
Extraction from production wells in the Reykjanes area in 2014 was around 16,336 million tonnes, which corresponds to an average annual production of 518 kg/s, or 0.086% less than the year before.
In 2014, injection into the geothermal reservoir at Reykjanes was approximately 82.54 kg/s on average, or approximately 2,603 million tonnes. Net extraction in 2014, therefore, was approximately 13,733 million tonnes, or approximately 436 kg/s. Work is ongoing to increase Re-injection at Reykjanes.
Operation and maintenance of power plants
The decision was made to postpone the major overhaul of unit 12 at Svartsengi for one year. The overhaul had been on the 2014 maintenance schedule.
The reason for the postponement can be traced to some extent to the decision to carry out stress tests on the Reykjanes geothermal system by temporarily reducing production in production wells.
Reykjanes power plant
The Reykjanes power plant performed quite well, with the exception of a few short repair stops, mainly for repairs to the steam supply systems.
Annual turbine inspections were carried out on unit 2 (50 MW) on 10–15 June and on unit 1 (50 MW) on 24–29 June. In addition to regular inspections, minor improvements were made to steam piping.
On 22 October, production well REYH10 was connected to system 2 after cleaning and maintenance. Re-injection into well 20 was reduced in mid-2014.
Svartsengi power plant
Unit 11 (30 MW) was shut down on 2–6 June for the annual turbine inspection and other maintenance.
Unit 12 (30 MW) was shut down on 10–17 June for the annual turbine inspection, inspection of fans and cooling tower together with minor repairs to the OV6 steam system.
Unit 3 (6 MW) was shut down 18–28 May for normal overhaul and cleaning.
The annual shutdown in OV 2 and OV 3 was on 30 September. The steam system and separator station were shut down for 10 hours for cleaning and inspection and minor renovations carried out.
Repair at Ormat units
Repairs on the air coolers at Ormat units 7 and 9 were initiated during the year. These involved lining the condenser pipes, as was done to units 8 and 10 in 2013 with good results.
Ormat unit 4 was not in operation in October 2014 due to a malfunction in its controls unit, which will be updated in 2015.
Hot water production towers 6, 7 and 8 underwent their 10-year maintenance inspection. De-aerator rings were replaced and other equipment inspected. The inspection revealed that maintenance on the interior of the towers will soon be necessary. This will be made much easier with the addition of the new tower 5, which is projected to be operational in Spring 2015.
A new re-injection station with two pumps that pump runoff water from heat production was brought on-line in September. Great success was achieved in controlling surface water with the addition of the pumping station. In addition, the volume pumped into the re-injection zone increased.
There has been considerable strain on the hot water production during the coldest months in recent years.
Strain on the hot water production
The construction of a new production unit was begun in 2014, unit 5, with a production capacity of 120 l/s. The unit was sited near the powerhouse of OV 2. The tower is expected to be ready for operation by the spring of 2015.
In 2014, work was started on increasing the flow capacity of the cold water utility with a 1.5 km pipe from the pumping station at Lágar to the pump house. This work was completed on 6 November 2014. The enlargement of the flow system led to excellent increases in transfer capabilities together with energy savings in pumping.