Experiment on a continuous heat regenerative adsorption refrigerator using spiral plate heat exchanger as adsorbers

Review of Regenerative Adsorption Heat Pumps

“…They con- 63 cluded that to achieve high SCP values the thickness of the zeolite layer should not exceed 2.5 mm, as is shown in Fig. 14. Cerkvenik et al 72 studied the relationship of performance to heat exchanger size for heat-driven heat pumps.…”

“…Tatlier et al, 57 and Tatlier and Erdem-Senatalar 58 provide a very good synopsis of attempts at increasing the contact conductance between the HTF tubes or conduits and the adsorbent, as well as Table 1 Adsorption devices built and tested by Gui et al, 60 Lu et al, 61 Wang, 62 Wang et al, 63 Wang, 64 Wang et al, 65−68 and Qu et al 69 Adsorption the effective thermal conductivity of the adsorbent. They go on to describe a process for depositing thin films of zeolite on steel tubing, analogous to that described by Cacciola et al 19 and Lang et al 31 Tatlier and Erdem-Senatalar 59 presented a follow-up study regarding the optimization of such coatings.…”

“…Gui et al, 60 Lu et al, 61 Wang, 62 Wang et al, 63 Wang, 64 Wang et al, 65−68 and Qu et al 69 have performed extensive research on adsorption heat pumps, which is summarized in Table 1. Wu et al 66,68 performed dynamic analysis of the mass and heat recovery process for a continuously operating heat pump and concluded that low heat transfer coefficients in the adsorber severely limit the recoverable adsorption heat.…”

“…Some investigators have employed the shell and tube heat exchanger, while others used a serpentine flat pipe winding between a stack of consolidated adsorbent bricks. 13,14,16,19,49 Wang et al 63 proposed a spiral strip or tape type adsorber coupled with a solar collector (Fig. 13).…”

Experiments on heat-regenerative adsorption refrigerator and heat pump

“…Several types of heat exchangers have been selected as adsorbers (Wang et al, 1998) such as shell and tube heat exchanger, flat pipe heat exchanger, flat plate heat exchanger and plate-fin heat exchanger. Recently, we developed spiral plate adsorber and plate fin adsorber, and incorporated into one refrigerator for ice-making and one heat pump for air conditioning, respectively, performance tests have shown good results.…”