Functional Design of the mCCHP-RES System - Design for Micro-Combined Cooling, Heating and Power Systems - page 259

(b) Determining the produced energy in a day of this month, Q ad : day :

Q ad : max
N days

Q ad : day ¼ ½ kWh = d ð 23 Þ

Q ad can be calculated with the following relation:

(c) The thermal power

Q ad : day
t oper

Q ad ¼

½ kW ð 24 Þ

where:
A TFA total floor area of residence (m 2 );

q ad : max value of the speci c heat production in the month with the biggest

production of the additional boiler (kWh/m 2 );

N days number of days of the month; and

t oper represents the daily operation time of the additional boiler at the nominal

thermal power (6 - 8 h on average).

Q ad : n that sat-

After that choose from the market a boiler with nominal power

is es the relation:

Q ad : n Q ad

ð 25 Þ

C. Chiller

A cooling system based on the absorption/adsorption technology consists of
three hydraulic circuits: driving heat, cold distribution, and heat rejection (Fig. 11 ).
The technical characteristics for absorption/adsorption chillers are presented in
Table 8 [ 8 ].
The required characteristic, which is imposed by the system functioning, and
based on which the chiller is chosen from the market and embedded into the system
is the maximum cooling power. For chiller sizing, the maximum cooling power
should be determined in the following steps:

(a) Determining the amount of cold produced by the chiller, Q cooling : max , in the
month in which the chiller load is the biggest:

Q cooling : max ¼ A TFA q cooling : max ð KWh = month Þ ð 26 Þ

(b) Determining the cold produced in a day of this month, Q cooling : day :

Q cooling : max
k

Q cooling : day ¼ ð kWh = day Þ ð 27 Þ

N days