Below, we have the comparison of 3 solutions:
a) gas heating
b) heating by advanced heat pump
c) district heating network heating by CPCU
Because what matters, in addition to CO2 is primary energy, EP in the text!
ERRATUM: Read 180kg of CO000 for the VRV instead of 2Capt_Maloche wrote:With a little bit of psychology , we can quickly explain that electricity generates more CO2 No, a little less that gas or fuel oil
500g of CO2 / kw.h useful (supplied) because in winter the peaks are supplied by oil and coal thermal power stations !!, the distribution efficiency remains poor after generation.
and the yield on EP is only 1 / 2.58 = 38% for nuclear
against 233g of CO2 / Kw.h for gas with yields of 97%
in addition, the savings made on energy consumption with the use of a heat pump is reduced to zero due to the short lifespan of this type of equipment which, after 8 to 12 years of operation, requires heavy interventions
I recently did an energy and environmental assessment for a project:
VRV = direct expansion system equivalent to a heat pump but more efficient
CPCU = Compagnie Parisienne de Chauffage Urbain (primary fuel: gas, heavy fuel oil, coal, household waste (yum) ...
voili voilou
Here is the table corrected following the muscular intervention below
If like me you did not know the CPCU, district heating network, here are some technical explanations: http://www.cpcu.fr/index.php/cpcu/La-ch ... selon-CPCU
We use different sources of energy to produce heat:
* energy recovery from waste, which is the primary source of heat distributed by our network
* gas in cogeneration and in boilers,
* finally, coal and fuel oil in the other CPCU production centers.
The high proportion of household waste probably explains the low value of 195 g of CO2 per useful thermal kWh!
Edit Capt_maloche 05/08/2009