far I knew only electrically driven heat pumps. Now I've read about a gas heat pump.
general, the heat pump
The ambient heat in a Ve
rdichter pumped by using refrigerant (the working fluid) from the lower to a higher temperature. The lower Temperature level at 10 ° C and the useful heat at 50 ° C. In the condenser the refrigerant changes its state from gaseous to liquid and releases the Philomene be ambient and heat of compression.
The liquid working medium absorbs the ambient heat in the evaporator and is thereby re-gas and the cycle starts all over again. This is the Carnot cycle process, while the efficiency is observed. The votes temperatures vary enormously as sources (ambient and room temperature).
The ambient heat can come from versc
Hieden sources. Most common are air / water heat pump which extracts the ambient heat from outside air. There are also water / water heat pumps absorb heat from the groundwater. Further, there are salt-water heat pumps, where the heat produced Erdregister or ground rod is pulled from the ground. If three systems are available and they are:
gas engine heat pumps gas absorption heat pump Diffusion - Absorption - Heat Pump (DAHP)
I get on two systems respond in more detail:
gas engine heat pumps
In a gas engine heat pump compressor is driven by a gas engine. The waste heat that is produced by the gas engine used also for heat. The
water heat pump process can be reversed, which is from the same machine, a refrigerator, which can be used in summer for cooling of buildings. In a gas heat pump reaches the COP (coefficient of performance or the performance coefficients in German) about 1.2 to 1.8 with here the additional heat from the gas engine will be added to the first in the primary energy ratio. Gas engine heat pumps have 18 - and 14-70kW Heating - 55kW cooling capacity and are used mainly in the industrial and service sectors.
gas absorption heat pump
in the gas absorption heat pump, like the electrical is ammonia dissolved in water, the ambient heat transport in the Kries run. The circuit is heated by a gas burner and the ammonia is divided by the water evaporates by itself. The hot ammonia
gas from the condenser is the heat recovered and becomes liquid again. Then is the liquid ammonia gas into the evaporator where it absorbs ambient heat again. The liquid gas enters the absorber to absorb water and then into the expeller is heated by gas burners. This system also can be reversed for cooling. Here the performance is much higher: Heating: 32-175kW and coolness
n 16 - 85 kW (for air - water and water - water systems) 
GWP compared to EWP
Basically, both systems are equal and have the great advantage of the free energy available to the Environment (air, soil, water) to use what seasonal performance enables significantly above 1.
direct comparison of the performance numbers (difficult) The numbers are very different because in the EWP, the ratio Strom-Input/Wärme-Output expressed with a power point which is good at 4.5 COP at are the gas heat pump, which stands at 1.2 to 1.8, the waste heat from the engine added in, but here it is called a primary energy ratio. However, a direct comparison of the performance numbers from EWP and primary energy ratio of GWP is not possible as this at a EWP critically on the mode of production the current depends on: This is in contrast to natural gas was not a primary energy, but a secondary energy carrier.
LCA depends on current production
As for the eco-and in particular the CO2 balance, 
is it also critical to the origin (production) of the current and the possible addition of CO2-neutral biogas to natural gas. Nevertheless, the GWP works with a finite energy at the ESP, it would be possible to use solar energy.
individual situation significantly
Due to different subspecies and varieties, and the combination of different climatic and structural conditions, no general ruling be made. It is necessary in each specific case, the solution leads to optimal results. In addition, play investment horizon, comfort requirements, availability of natural gas, etc. play an important role.
heating power at low outside temperatures
at low temperatures it becomes increasingly difficult for heat pumps to absorb ambient heat (eg due to icing of the air register). Even at extremely low outside temperatures, the power of the gas pump but not below the nominal power of the gas burner or the mechanical and thermal performance of the gas engine. The efficiency is so also in the worst case more than 100%.
CO2
burn the CO2 levy on natural gas is about 25% lower than for heating oil. Which is dependent on the chemical structure, proves a higher energy content per carbon atom. The efficiency of a condensing gas boiler is 110% against and with the help of the additional waste heat utilized during combustion gets an efficiency of GWP 130-180%.
Charlotte Hille
0 comments:
Post a Comment