Question

the specific heat of respectively, determ the room is well sea FIGURE P4-33 4-34E A rigid 1-ft3 vessel contains R-134a originally at -20°F and 27.7 percent quality. The refrigerant is then heated until its temperature is 100°F. Calculate the heat transfer required to do this. Answer: 84.7 Btu Heat R-134a 1 ft -20°F =0.277 4-40 Steam a FIGURE P4-34E loaded

Answer 1

- ain = su = m(4₂-4,) T=-204 3 vt auft avez = 0.01156+ 0.277 (3.4426- x, = 0.277 = 0.961959 ft 3 0.01156) ebm ů, = 4ft aufg 4. - 8.019 + 0.277 (85.874) = 29.806 Bto ebm

T = 1004 &= 0, = 0.961959 f Ibn At-20k, Psat = 12.906 Psia 4₂ = 111.35 Btu & as it eben is in from supecheated Table Superheated = 1.0395 bazebom e state} * = 0.961959 Qin = m(42-4,) = 1.0395 (11-35- 29.806) I ain= 84.764 Bta Aus.