166
Md. A. Islam and B. B. Saha
Table 9.7 (continued)
Parameter
Quantity
The weight percentage of raw materials to
build a cooling system
Stainless steel: 60%
Copper: 10%
Aluminum: 10%
Others (refrigerant, adsorbent, cooling/chilled
water etc.): 20%
GWP of per kg material production, GWP m
Stainless steel: 2.13 kg-CO 2 eq. (Chisalita
et al. 2019)
Copper: 4.97 kg-CO 2 eq. (Kosai and Yamasue
2019)
Aluminum: 9.17 kg-CO 2 eq. (Kosai and
Yamasue 2019)
System lifespan
25 years (Bry-Air 2019)
System runtime
12 h/day
and low-temperature applications require different working fluids, such as methanol
and ammonia (Ebrahimi and Keshavarz 2014). Activated carbon is suitable for the
adsorption of these refrigerants.
COP of the adsorption cooling system can be expressed in two ways which are
shown in Eqs. (9.15) and (9.16). Thermal input is very high compared to cooling output for adsorption cooling system. Hence, thermal COP is usually very low.
Moreover, electricity input is much lower for a solar cooling system, and therefore
electrical COP is very high. Thermal COP of the chiller for room air-conditioning
system is the range of 0.5–0.6 (Bry-Air 2019; Stryi-Hipp 2016). COP decreases for
lower evaporation temperature. In this assessment, we have considered COP values
0.6, 0.4 and 0.2 for room air-conditioning, medium temperature and low-temperature
cooling systems, respectively.
C O P thermal =
Q eva
Q des
(9.15)
C O P elctrical =
Q eva
E in
(9.16)
Here,
Q eva Evaporator cooling capacity (kJ)
Q des Required thermal input for desorption (kJ)
E in Required electrical power input (kWh) or (kJ).
The adsorption chillers require a small amount of electricity to run the pumps
(chilled water, cooling water) and control the valves. A 10 kW chiller requires about
0.8 kW electricity according to the manufacturer’s specification (Bry-Air 2019).
Medium and low-temperature applications require a considerably higher amount
Md. A. Islam and B. B. Saha
Table 9.7 (continued)
Parameter
Quantity
The weight percentage of raw materials to
build a cooling system
Stainless steel: 60%
Copper: 10%
Aluminum: 10%
Others (refrigerant, adsorbent, cooling/chilled
water etc.): 20%
GWP of per kg material production, GWP m
Stainless steel: 2.13 kg-CO 2 eq. (Chisalita
et al. 2019)
Copper: 4.97 kg-CO 2 eq. (Kosai and Yamasue
2019)
Aluminum: 9.17 kg-CO 2 eq. (Kosai and
Yamasue 2019)
System lifespan
25 years (Bry-Air 2019)
System runtime
12 h/day
and low-temperature applications require different working fluids, such as methanol
and ammonia (Ebrahimi and Keshavarz 2014). Activated carbon is suitable for the
adsorption of these refrigerants.
COP of the adsorption cooling system can be expressed in two ways which are
shown in Eqs. (9.15) and (9.16). Thermal input is very high compared to cooling output for adsorption cooling system. Hence, thermal COP is usually very low.
Moreover, electricity input is much lower for a solar cooling system, and therefore
electrical COP is very high. Thermal COP of the chiller for room air-conditioning
system is the range of 0.5–0.6 (Bry-Air 2019; Stryi-Hipp 2016). COP decreases for
lower evaporation temperature. In this assessment, we have considered COP values
0.6, 0.4 and 0.2 for room air-conditioning, medium temperature and low-temperature
cooling systems, respectively.
C O P thermal =
Q eva
Q des
(9.15)
C O P elctrical =
Q eva
E in
(9.16)
Here,
Q eva Evaporator cooling capacity (kJ)
Q des Required thermal input for desorption (kJ)
E in Required electrical power input (kWh) or (kJ).
The adsorption chillers require a small amount of electricity to run the pumps
(chilled water, cooling water) and control the valves. A 10 kW chiller requires about
0.8 kW electricity according to the manufacturer’s specification (Bry-Air 2019).
Medium and low-temperature applications require a considerably higher amount