English Glossary

on a tilted surface

A valve which is lockable or requires a special key to open to prevent operation by mistake

Generally a duty or tax on imports (charged/ levied based on a percentage of cost or specific amount per unit), but can also mean charge/payment for a service as in 'feed-in-tariff'.

Automatic (annual or monthly) reduction of feed-in tariff payment levels in order to anticipate technology improvements.

transmission Code 2007

total cost of ownership

transparent conductive oxide

A device that gives a visual indication of the temperature in a system

A device that senses the temperature in a system

A pocket or sleeve installed in the fluid flow of a system into which the temperature sensor is inserted

In loan finance, the number of years a loan is outstanding (i.e., the final maturity or term).

A non-binding agreement setting forth the basic terms and conditions under which an investment will be made. A term sheet serves as a template to develop more detailed legal documents. Once the parties involved reach an agreement on the details, a binding agreement or contract is drawn up.

Voltage level at the connection terminal of a certain electrical unit to the power system

Third grid control mechanism that has to be available within 15 minutes. It involves a manual or automatic change in the dispatching of power, e.g. changing power output of certain generators participating in secondary control. It is also known as tertiary frequency control, tertiary reserve is also known as minute reserve.

Reserve available after 15 min. (Syn. minute reserve)

Area of an object (frequently a building) which has a significantly higher heat transfer than the surrounding materials, resulting in an overall reduction in the thermal insulation of the object or building.

Material or construction that reduces the transfer of heat from one objects to another or to the outside environment.

Thermal oil is the most commonly used heat transfer fluid in parabolic trough CSP arrays. Its composition is 26.5% biphenyl, 73.5% diphenyl oxide. It operates in the temperature range 12-392C. It is non-corrosive but it is toxic.

(bio.) Thermophilic digestion process is an anaerobic digestion which takes place optimally around 50°C-52°C but also at elevated temperatures of up to 70°C, where thermophiles are the primary micro-organisms (bacteria) present.

A heating system in which the fluid circulates by natural convection due to the different densities of the fluid at different temperatures