Performance Improvement of OTEC-ORC and Turbine Based on Binary Zeotropic Working Fluid

Table 1

The main parameters and 1-D design results.

Parameters	Units	Values	Parameters	Units	Values
Tws,in	°C	28	Tcs,in	°C	5
Tturb,in	°C	26	Tcon,out	°C	7
pturb,in	MPa	0.623	pturb,out	MPa	0.453
Mwf	kg/s	9.13	WT	kW	100
χa	—	0.707	𝛈T	—	0.9
α1	°	14°		—	0.42
β2	°	30°	Ψ	—	0.85
Ω	—	0.5	φ	—	0.96
c2ss	m/s	148.01	Dr,hub	m	0.0579
c1	m/s	100.47	Dr,out,m	m	0.1527
u1	m/s	104.64	lr,out	m	0.0750
	m/s	25.34	δs,r	m	0.0013
c2	m/s	25.37	Lrx	m	0.120
u2	m/s	43.95	Dn,in	m	0.452
	m/s	50.75	Dn,out	m	0.364
Nr	—	15	rv,in	m	0.05174
Nn	—	24	rt,max	m	0.3305
Ret1	—	6.6732 × 10^7	Ld	m	0.075
μ1	Pa·s	1.0514 × 10^−5	Ltx	m	0.225
Dr,in	M	0.3635	ηu	—	0.8148
N	rpm	5498.55	ηt,isen	—	0.7601
Ar,out	m^3	0.0313	ζl	—	0.03842
Dr,shroud	m	0.208	ζf	—	0.01625