In this work, an air-cooled, single effect solar-driven absorption system is being evaluated from the point of view of 1${}^{\mathrm{st}}$ and 2${}^{\mathrm{nd}}$ thermodynamic principles for two different applications: absorption chiller and heat pump. One of the most widely used working pairs, LiBr-H${}_2$O, is applied in this study due to its high performance in the absorption cycle. Their performance is compared with another working pair Carrol-H${}_2$O (Carrol contains LiBr and EG -Ethylene glycol- with a mass ratio of 4.5:1). The Carrol solution has the advantage of reducing the crystallization risk at the high concentration solution which enters the absorber. The numerical modelling was implemented on a modular object-oriented simulation platform (NEST platform tool), which allows linking different components, considered objects. In the simulations performed, the heat source temperature in the system is in the range of 70-90 ${}^{\circ }$C, and the inlet temperature at evaporator secondary circuit at chiller application is fixed in two values, 9${}^{\circ }$C and 14${}^{\circ }$C, and for heat pump application in 0${}^{\circ }$C and -5${}^{\circ }$C. Moreover, EG is added to the evaporator at heat pump application to prevent the refrigerant water from freezing below zero. The studied mass concentration range of EG of 10-40%. The result shows the $COP$ of an absorption chiller and heat pump are around 0.7 and 1.6, respectively, and the $CO{P}_{\mathrm{EX}}$ values are 0.2-0.6 at chiller application and 0.5-1.5 at heat pump application. When compared with LiBr system, Carrol system has about 6.4% higher $COP$, about 6.3% higher $CO{P}_{\mathrm{EX}}$, and a decrease of about 19% of cooling capacity. In the heat pump application, the heat source temperature should be lower than 90${}^{\circ }$C, and EG concentration at evaporator has been chosen as 30% as an optimal value. According to the operation condition, this EG concentration has been determined to avoid freezing in the evaporator in the studied working range. However, too much EG significantly decreases the pressure in the evaporator and increases the viscosity, hence will increase the maintenance of equipment as more vacuum tightness is required.

在这项工作中，正在从 1 的角度评估风冷、单效太阳能驱动的吸收系统${}^{\mathrm{英石}}$ 和 2${}^{\mathrm{nd}}$两种不同应用的热力学原理：吸收式制冷机和热泵。使用最广泛的工作对之一，LiBr-H${}_2$O，由于其在吸收循环中的高性能而被应用于本研究。他们的表现与另一个工作对 Carrol-H 进行了比较${}_2$O（Carrol 含有 LiBr 和 EG -乙二醇 - 质量比为 4.5:1）。Carrol 溶液具有降低进入吸收器的高浓度溶液结晶风险的优点。数值建模是在模块化面向对象仿真平台（NEST 平台工具）上实现的，该平台允许链接不同的组件，考虑对象。在进行的模拟中，系统中的热源温度在 70-90${}^{\circ }$C，冷却器应用中蒸发器二次回路的入口温度固定为两个值，9${}^{\circ }$C 和 14${}^{\circ }$C、热泵应用在0${}^{\circ }$C和-5${}^{\circ }$C. 此外，EG 在热泵应用中被添加到蒸发器中，以防止制冷剂水冻结在零以下。EG 的研究质量浓度范围为 10-40%。结果显示$C哦磷$ 吸收式制冷机和热泵的 0.7 和 1.6 左右， $C哦{磷}_{\mathrm{前任}}$冷水机应用的值为 0.2-0.6，热泵应用的值为 0.5-1.5。与 LiBr 系统相比，Carrol 系统高约 6.4%$C哦磷$, 高出约 6.3% $C哦{磷}_{\mathrm{前任}}$，冷却能力下降约 19%。在热泵应用中，热源温度应低于90${}^{\circ }$C、蒸发器中EG浓度选择30%为最佳值。根据运行条件，已确定此 EG 浓度以避免在研究的工作范围内蒸发器中结冰。然而，过多的EG会显着降低蒸发器中的压力并增加粘度，因此会增加设备的维护，因为需要更高的真空密封性。