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coSt calcUlatIon to vdI 2067
Cost calculation
Calculation in accordance with VDi
2067
to establish the total costs, carry out
the following calculations.
Hours run at full utilisation
VDI 2067 sheet 1 to 6
the hours at full utilisation are
required for calculating the annual
heat demand. the calculation is based
on the number of heating days during
the heating season, the average
building temperature, the average
outside temperature and the lowest
outside temperature.
Energy costs
VDI 2067 sheet 1 to 6
the energy costs result from the
energy consumption, the energy price
and the standing charges.
Operating costs
VDI 2067 sheet 1, table A2
Costs for maintenance, cleaning and
chimney sweeping.
Capital costs
VDI 2067 sheet 1, table A8
interest and repayments of system
costs.
Maintenance
VDI 2067 sheet 1, table A2
the maintenance costs are calculated
as a percentage of the system costs.
Annuity calculation
the VDi 2067 uses the annuity
method. Part 6 is responsible for
calculations in connection with
heat pumps. the annuity factor
determines the uniform payments in
connection with an investment that
are due annually. the annuity method
provides a dynamic investment
calculation that converts the payments
received and made into equal annual
contributions (annuities). Primarily,
the annuity method is used in the
investment and finance sector. in
addition, it is used in cost calculation
regarding long-term decisions, such
as the selection of processes or
whether to manufacture in-house or
use outside suppliers.
Amortisation calculation
An investment is viable if, with the
given interest rate, an average annual
surplus can be achieved that is greater
or equal to zero. Using the cash
value and the cash value factor the
amortisation can be calculated.
Cash value
the value of one or several capital
sums due in future within the
reference time. the cash value or
present value is the current value of
future receipts or payments resulting
from discounting. the cash value (K0)
is determined when regular equal
payments are made:
a = periodically due retroactive
payments (interest).
Cash value factor
the discounting total factor (cash
value factor, interest cash value
factor, discounting total factor,
capitalisation factor) is one of the
financial-mathematical factors. it
applies interest to the segments g of
a series of payments, taking the rate
of interest and compound interest
into consideration, and adds the cash
values together.
Summary of Contents for Heat pumps
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