"In my view, if the idea [about the pump] was to help patients, let Amref repair the current borehole at the unit, then fence it in such that patients who can't afford to buy the piped water could then fetch there," he said, adding that to reduce consumption rate by the surrounding residents, Amref should drill another borehole outside the unit for residents to use.
Thermal performance was based on the temperature differences between inlet and outlet of U-tubes and the heat transfer per unit borehole depth (QL).
Different inlet velocities of U-tubes were considered, and we found the heat transfer per unit borehole depth QL increases with the increase of inlet velocities, e.g., the QL of smooth U-tube was 35 W/m at inlet velocity of 0.2 m/s, and increased by 43% when the velocity was increased to 1.2 m/s.
"We now fetch water from Abia borehole [1km from the unit] or buy from the trading centre at UShs 100 per jerrycan.
The temperature of the seasonal storage unit, a borehole array in crystalline rock of 60,000 m3, varies between 30 and 45°C over the year.
Calibration of shelf sedimentary units with borehole stratigraphies indicates the impact of higher-frequency (20-ka) sea level cycles punctuating this 100-ka cycle.
That is, the heat compensation unit reheats the borehole outlet fluid and improves the temperature of the fluid entering the evaporator of heat pump during the heating season.
In this study, a new 1D analytical expression for heat transfer rate (HTR) per unit length of a borehole is derived at constant borehole wall temperature condition by using Green's function method (GFM).
Effect of borehole spacing on Heat Transfer Rate per unit borehole length (unit HTR) is computationally investigated for multiple Borehole Heat Exchangers (BHE).
James Obore, Katine sub-county chief, said it would help if more boreholes are drilled outside the unit to reduce the consumption burden on the health centre; only patients and health workers would use piped water and a current borehole at the unit –if repaired – while everyone else could use the additional boreholes.
