versie 23-4-2001
Comparison of heatpumps in AHU´s Hemmes, Menerga, Dantherm e.a.
					Wanted dehumidification			175	kg/hr
NB:  enthalpy of stale air kept at the same value (thanks to aftercooler heatpump)
	Temp	RH %	x  abs g/kg
Outside	18	70	9				effic. Eplant	0,4
Inside	31	51	14,3				effic. therm	0,9
supplytemperature	31
	100% outside air systems					recirculating systems
	Hemmes	Hemmes	Menerga			Menerga	Gea Happ	Dantherm	Dantherm
	BH90	BH60	Men60	Hpu stale	Vent60	Mecirc.
	90%+90%	60%+60%	2x60%	0%wtw	60%wtw	2x60%	circa60%	0% 13,4degC	0% 5 degC
supply  x abs   g/kg	5,422	5,422	9	9		9		8,537556	5,409077
delta-x     g/kg	8,878	8,878	5,3	5,3		5,3		5,762444	8,890923
airflow required  kg/hr	19712	19712	33019	33019		33019		30369	19683
air flow required  m3/h	17386	17386	29123	29123		29123		26786	17360
cooler for dehumidification   kWk	54,1	78,6				166,0		277,3	269,5
heater  kWth (to same supplytemperature)	7,7	40,5	29,0	122,0		44,5		152,0	144,5
stale air cooler kWc (to 25,43kJ/kg)	79,1	87,3	157,6	248,1
COP chiller  sec	4,0	4,0	4,0	4,0	4,0	4,0	4,0	4,0	4,0
cooler for dehumidification E  kWe	13,5	19,7				41,5		69,3	67,4
stale air cooler E  kWe	19,8	21,8	39,4	62,0
condensorheat from dehumidification. kWth	67,6	98,3				207,4		346,6	336,8
condensorheat from stale air cooler kWth	98,9	109,2	197,0	310,2
Netto for dehumidification
Electra  kW	13,5	19,7	0,0	0,0		41,5		69,3	67,4
heatsurplus     kWth	60,0	57,7	-29,0	-122,0		163,0		194,6	192,3
"COP heatpump"	4,4	2,9	#DIV/0!	#DIV/0!		3,9		2,8	2,9
Netto for dehumidification plus stale air cooler
Electra  kW	33,3	41,5	39,4	62,0		41,5		69,3	67,4
heatsurplus     kWth	158,8	166,9	168,0	188,1		163,0		194,6	192,3
"COP heatpump"	4,77	4,02	4,26	3,03		3,93		2,81	2,85
(cop max= cop cooling +1)
Heatfactor  (useful surplus heat/used primary source)	1,91	1,61	1,71	1,21		1,57		1,12	1,14
evaporation of the pool is heat loss
evaporation of the pool  kWth	110	110	110	110		110		110	110
still to consider : the exact fanenergy and the real COP considering the temperatures of the cooling path.