This research aims at designing, simulating, and experimentally testing a solar-assisted hydraulic ramrnpump, which is an automatic water-lifting device convenient to pump water, by adding energy to thernchamber. Low level performance of HRP triggered working on performance improvements. Thernapproach to achieve the objective involves knowing the basic working principle of regular hydramrnand water hammer effect, data collection and synthesis with understanding of fundamental thermofluidrnrnand heat transfer principles, development of a mathematical model, CFD simulation of thernthermal effect inside the pressure chamber and finally experimental test. rnThe efficiency of regular hydram can reach 65% delivering around 5 liters per minute with the netrnhead of 6m. The mathematical model gives maximum water hammer pressure change of 268.4 kPa,rnwhereas experimental test results 183.33kPa. Flow rate at the exit of the pump was 4.72 L/minuternwith source flow of 12 liters every minute and supply head of 2.18m. Experimental test getting arnsource flow of 34 liters every minute gave 11.72 liters per minute. rn The regular hydraulic ram pump was assisted with solar thermal system to improve its performance.rnThe temperature generated from thermal collector was applied to the chamber. For the experimentalrntest, equivalent controllable electrical heater was selected having a temperature of 200 rnornC. rnThe temperature effect results 33kPa pressure rise when computed analytically with approximaternchamber temperature of 150 rnC.rnThe exit flow rate was 1.35 and 1.667 liters per minute for the analytical and CFD modelingrnrespectively at source flow of 12 liters each minute. rnornC. While CFD provides 50kPa with chamber temperature of 145rn ornSuperposition of thermal and water hammer effect gave 301.4 and 318.4 kPa analytical and CFDrnsimulation respectively. Thermal infusion test, conducted at San Diego State University, measuredrnmaximum chamber pressure of 342.32 kPa with chamber temperature of 106.75 rnC. Exit flow raternwas 6.07 liters per minute for analytical, 6.387 liters per minute for CFD with supply flow of 12 litersrnper minute for a pump having 27 mm diameter at supply height of 2.18 m. During the thermalrnexperiment 16.41 liters per minute was recorded with supply of 34 liters per minute. Therefore, after the application of thermal energy to the pump delivery head was improved by a minimum of threernmeter. rnThe heat energy will be generated by using UHVFP collector. The energy is delivered to the chamberrnthrough thermal oil, since thermal oils does not need any pumping system. The hot fluid coming outrnof the solar thermal collector applied around the wall of the chamber. rnThe power of solar radiation for Addis Ababa was investigated to model the solar thermal potentialrnas case study. The lowest solar radiation occurs in July and its value is 350 W/mrn. Ultra-high vacuumrn(UHV) collector was selected since it can generate mid-range temperature. A minimum meanrntemperature difference of 110 rn2rnC obtained with a collector efficiency of 50%. With the UHV collectorrnfluid outlet temperature, 225 rnornC can be produced during July. Therefore, this newly designed novelrnhydraulic ram pump can lift water by improving delivery head at least by three meter than regularrnhydraulic ram pump with higher delivery flow if it is assisted by solar energy.