gshp, ground at 10degrees is next to low output temp or high output temp?
Low output temperature
Pump type and source Typical use 35 °C\n(e.g. heated screed floor) 45 °C\n(e.g. heated screed floor) 55 °C\n(e.g. heated timber floor) 65 °C\n(e.g. radiator or DHW) 75 °C\n(e.g. radiator and DHW) 85 °C\n(e.g. radiator and DHW)
High-efficiency air source heat pump (ASHP), air at −20 °C 2.2 2.0 ‐ ‐ ‐ ‐
Two-stage ASHP, air at −20 °C Low source temperature 2.4 2.2 1.9 ‐ ‐ ‐
High efficiency ASHP, air at 0 °C Low output temperature 3.8 2.8 2.2 2.0 ‐ ‐
Prototype transcritical CO\n2 (R744) heat pump with tripartite gas cooler, source at 0 °C High output temperature 3.3 ‐ ‐ 4.2 ‐ 3.0
Ground source heat pump (GSHP), water at 0 °C 5.0 3.7 2.9 2.4 ‐ ‐
GSHP, ground at 10 °C Low output temperature 7.2 5.0 3.7 2.9 2.4 ‐
Theoretical Carnot cycle limit, source −20 °C 5.6 4.9 4.4 4.0 3.7 3.4
Theoretical Carnot cycle limit, source 0 °C 8.8 7.1 6.0 5.2 4.6 4.2
Theoretical Lorentzen cycle limit (CO\n2 pump), return fluid 25 °C, source 0 °C 10.1 8.8 7.9 7.1 6.5 6.1
Theoretical Carnot cycle limit, source 10 °C 12.3 9.1 7.3 6.1 5.4 4.8
csv/203-csv/195.tsv