Manual T*SOL basic 5.0 - Valentin Software

13 Appendix User Manual T*SOL
Loan interest
The amount of interest that has to be paid on a loan. If the loan interest rate is lower than the capital
interest rate, borrowing a loan results in income from interest.
Local heating LH
Local heating describes the transfer of heat between buildings over relatively short distances in
comparison with district heating.
Low temperature circuit
Heating loop with low flow and return temperature, e.g. for use with underfloor heating
MeteoSyn
Program for generating climate data.
Nominal size [-] [mm]
States the diameter of a pipe. DIN nominal piping sizes are used to calculate the collector loop piping
widths. The term DN (diameter nominal) states the internal diameter. With copper piping, the outer
diameter and the wall thickness of the material are stated.
Off off
Switch in a program dialogue box.
On on
Switch in a program dialogue box.
Operating costs [€/a]
Costs arising from operation of the system, e.g. maintenance costs, electricity costs. The → cash
value and the → annuity of the operating costs are derived from the → capital interest, → rate of
price increase, and the → lifetime.
Operating period (h)
Each respective component is active during the operating period. A component is not active during
the specific time periods (hours, days or months) that have been switched off.
Orientation angle α (°)
(azimuth) Describes the angle of deviation of the collector area from the south in the northern
hemisphere. It is 0° when the surface is facing due south. The azimuth is positive when facing west
and negative when facing east. An orientation due west corresponds to a value of +90° and an
orientation due east is -90°.
Pay-back time
Period of time required until the total of returns on an investment (static payback method) or its →
capital value (dynamic payback method) reaches the amount of the investment. Here: the period of
time the system must operate for the investment to yield a capital value of zero. The program does
not calculate pay-back times of over 30 year.
Primary Pr
Primary energy requirement Qp [kWh/a] [kWh/(m²a)]
Calculated amount of energy required for space heating and domestic hot water, which, in addition
to energy content of the required fuel and the auxiliary power for the system technology, also
includes amount of energy resulting from upstream process chains outside the building in extracting,
converting, and distributing the respectively used fuels. - available in table form.
page 97 / 104 Dr. Valentin EnergieSoftware GmbH