Hello everyone,
I have an issue with the Type 954b (air source heat pump with a gas auxiliary system).
I don’t understand why the efficiency of the auxiliary heater is not totally taking into account by TRNSYS.
Indeed, if I change the efficiency of the auxiliary system, I can see this change by plotting the output “total heat rate”. However, regardless this change, the output temperature of the Type 954b remains the same. In
other words, the output air temperature of the Type 954b does not seem influenced by the efficiency of the auxiliary system …
To illustrate my issue, here is an example of data at one specific time (the capacity of the auxiliary system is 22,578 kJ/h) :
|
Efficiency |
Total heat rate (output of the Type 954b) |
Input air temperature of the Type 954b |
Output air temperature of the Type 954b |
Airflow |
|
90% |
20,320 |
19.2 |
23.96 |
4,752 |
|
10% |
2,258 |
19.2 |
23.96 |
4,752 |
Is it normal ? Do you have an explanation to this ?
If not, do you have any suggestions ?
Thank you,
Laura
Laura Guillon,
Jr. Eng M.A.Sc
Project Leader
Natural Gas Technologies Centre
1350 Nobel, Suite 150, Boucherville, Quebec
J4B 5H3 (Canada)
Tel.: 450-641-0021
laura.guillon@ctgn.qc.ca