Japheth Sang is a mechanical engineer having studied BSc Mechanical engineering and soon to graduate with an MSc Energy Management from the University of Nairobi. A skilled Mechanical & Energy Engineer with a hands-on approach tackling projects and accomplishing goals, highly motivated with a strong technical background in load estimating, energy and cost modeling, equipment sizing and the ongoing measurement and verification (M&V) of energy savings post installation.
Experience in maintaining all aspects of the laboratory’s quality system in accordance with the Quality Manual and the laboratory’s accreditation to the relevant ISO standard e.g. ISO 17025, IEC CB Scheme and OHS requirements. Interested in energy intensive building services infrastructure including HVAC (chillers, cooling towers, boilers, pumps, air handling systems, fans), lighting and Building Management Systems, and has the ability to communicate effectively and be able to build strong relationships at all levels internally and within customer organizations.
Reg. No: F56/11914/2018
Thesis / Project Title: Sizing of a Solar Water Heater - Heat Pump Water Heater Hybrid Design; Case Study of Comfort Gardens Hotel.
Heating requirements in particular, water heating in hotels constitutes approximately 28% of the total energy costs, which translates to higher emission levels to the environment. These high costs of energy have necessitated the use of energy and environmental management systems to curb the energy costs. Hoteliers have adopted the use of emerging and popular technologies mostly renewable energy technologies. They include the use of solar water heaters, heat pump water heaters, and efficient boiler among others. This research focuses on the viability of using a combined SWH and a HPWH in a hybrid setup for a hotel. Comfort Gardens hotel was used as the case study for this research, providing the data required for design. A hybrid water heating system was sized, designed and was guided by the use of software RET screen, Polysun and SAM. The designer selected two HPWH with a heating capacity of 90 KW each to compliment the 17 solar panels sized to meet the demand of 118.47 Kwh/day. The total demand to be supplied by the HPWH is 78.98 Kwh/Day with one HPWH acting as a backup. An economic analysis done found the NPV and IRR for scenarios A and B were estimated to be Kshs 5,121,699 ($ 44,536), Kshs 6,599,700 ($ 57,389) for the NPV and 33.06%, 39.63% for the IRR respectively. Payback periods for Scenarios A and B computed gave an estimated 2.85 and 2.43 years respectively. From all the financial evaluations, a positive NPV for both scenarios confirm the viability of the project while the payback of approximately 2 years for both scenarios was realized. Recommendations on areas of further studies are proposed in the report.
Research Supervisors:
PROF CYRUS WEKESA
https://scholar.google.com/citations?user=JPQCPZ4AAAAJ&hl=en