Manual T*SOL basic 5.0 - Valentin Software

User Manual T*SOL 13 Appendix
Annual heating requirement, specific, qh [kWh]
The heat, based on the floor space, that must be yielded within a year to maintain a target
temperature in the building (effective energy).
Annuity A
A series of equal payments, allowing for → lifetime and interest rate, for repayment of a capital debt.
It is the product of annuity factor and investment sum.
Anti-Legionnaire's switch LEG
The guidelines of the German Association for Gas and Water specify that the entire content of the
storage tanks and the piping in systems with a drinking water storage tank size of 400 liters and
domestic hot water pipe content of over 3 liters must be heated to 60° once a day. The hot water
storage tank is loaded in adjustable intervals in systems with an anti-Legionnaire's switch.
Annual energy requirement
-> Final energy requirement
Aperture Aa (m 2 )
Largest projected area through which unconcentrated solar irradiation enters the collector. In flat
plate collectors, the area of the collector covering through which solar irradiation can penetrate the
inside of the collector housing (light penetration area). In evacuated tube collectors, the aperture is
the product of the length and width of the absorber strip and the number of tubes. If evacuated tube
collectors are fitted with a reflector (→ CPC), the aperture is equal to the product of the length and
width of the mirror surface
Auxiliary heating AuxH
Ensures that the → target temperature is reached even when there is insufficient irradiation. Where
applicable, it also supplies the heating loop. Usually refers to the boiler.
A/V ratio
The A/V ration is the quotient of area to volume and is displayed in the unit 1/m.
Balance (B)
→ Energy balance
Balancing
→ Energy balance
Base load [W, kW]
Minimum load / output an energy supply system must make available constantly during a period of
use.
Boiler Boil
Serves to convert chemical energy into heat.
Boiler efficiency η [-]
The boiler efficiency describes the relationship between the energy used by the boiler and the energy
produced over a specific period of time.
Buffer tank Buff
A storage tank filled with domestic hot water, usually in steel. The heat is transferred either
internally via a serpentine pipe or outside the tank by means of an external heat transfer medium.
Building energy requirement Qb [kWh/a]
Generic term for heating requirements, cooling requirements, energy requirements for hot drinking
water, lighting, humidification.
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