A hybrid solar-assisted adsorption cooling unit for vaccine storage
A hybrid solar-assisted adsorption cooling unit for vaccine storage
复制标题
DOI：
10.1016/j.renene.2006.02.018
复制
发表时间：
2007-05-01
期刊：
影响因子：
8.7
通讯作者：
Dawoud, Belal
中科院分区：
文献类型：
--
作者：
Dawoud, Belal
已经开发出一种用于疫苗储存的混合吸附冷却装置的概念，该装置利用太阳能作为主电源，并使用燃气燃烧器作为替代电源。冷却装置的部件按照世界卫生组织的要求设计，可在非洲西海岸布基纳法索的气候条件下工作。第一个吸附器由燃气燃烧器驱动，选择了 zeolite-13X。第二个吸附器采用太阳能选择性吸水剂SWS-2L。两种吸附剂均选择水作为制冷剂。对设计冷却装置预期性能的理论研究表明，在 T-evap = -5 ℃、T-con = 55 ℃、T-ads = 38 ℃、T-des(max) = 122 ℃ 的设计条件下，基于吸附装置的热量输入，太阳能运行系统的性能系数 (COP) 为 0.28。对于燃气加热系统，也有 在 T-evap = -5 摄氏度、T-con = 55 摄氏度、T-ads = 38 摄氏度、T-des(max) = 280 摄氏度的设计条件下，估计 COP 为 0.28。在较宽的解吸温度范围内，估计了操作两个系统所需的 COP、冷却能力和加热功率的变化。事实证明，SWS-2L/水系统比 zeolite-13X/水系统对操作条件更加敏感。获得的结果应可用于设计冷却装置的控制和加热组件。 (c) 2006 Elsevier Ltd. 保留所有权利。
A concept of a hybrid adsorption cooling unit for vaccine storage utilizing solar energy as a main power supply and a gas burner as an alternative power supply has been developed. The components of the cooling unit have been designed to work under the weathering conditions of Burkina Faso, West coast of Africa according to the requirements of the World Health Organization. For the first adsorber, which is driven by a gas burner, zeolite-13X has been selected. For the second adsorber to be driven by solar energy selective water sorbent SWS-2L has been applied. Water is selected as a refrigerant for both adsorbents. Theoretical investigations of the expected performance of the designed cooling unit have shown a coefficient of performance (COP) of 0.28 for the solar-operated sy,stem based on the heat input to the adsorption unit, at the design conditions of T-evap = -5 degrees C, T-con = 55 degrees C, T-ads = 38 degrees C, T-des(max) = 122 degrees C. For the gas-heated system, also a COP of 0.28 has been estimated at the design conditions of T-evap = -5 degrees C, T-con = 55 degrees C, T-ads = 38 degrees C, T-des(max) = 280 degrees C. The variations of COP, cooling capacity and the heating power required to operate both systems have been estimated for a broad range of desorption temperatures. It turns out that the SWS-2L/water system is much more sensitive to the operating conditions than the zeolite-13X/water system. The obtained results should serve in designing both control and heating components of the cooling unit. (c) 2006 Elsevier Ltd. All rights reserved.