RENEWABLE ENERGY ADOPTION FOR NET- ZERO ENERGY CONCEPT FOR SENIOR - - PowerPoint PPT Presentation

4TH GHANA RENEWABLE ENERGY FAIR RENEWABLE ENERGY ADOPTION FOR NET- ZERO ENERGY CONCEPT FOR SENIOR HIGH SCHOOLS IN GHANA

(CASE STUDY OF ACCRA ACADEMY)

Presented By: SAMPSON AMANYO-ZICKSON (MEnergy) CHARLES NII-BAAH AMOO (MEnergy)

(ZANET ENERGY SOLUTIONS)

AIM OF PROJECT

Energy use is paramount to the operations of senior high schools (SHSs) in Ghana and poses a significant cost to their annual budgets. This project sought to assess the economic feasibility of a switch in energy consumption of SHSs in Ghana from traditional grid electricity and LPG to solar power and biogas. It is also to assess the probability of converting existing public senior high schools to NZE status.

NET

• ZERO ENERGY BUILDING (NZEB)

CONCEPT

NZEB, the concept which stipulates that buildings (or sites) produce as much energy as they use over the course of a year has been evolving from research to reality. Currently, there are only a small number of highly efficient buildings that meet NZEB status.

NZEB

Energy Efficiency Active Solar Biogas Passive Solar Efficient Lighting Efficient Appliances

DATA OF ACCRA ACADEMY

“Boys-only” SHS in Accra with a student and staff population of 2300 Total electricity consumption of 68.8 MWh in 2017 – about 9% and 20% more than what was consumed in 2016 and 2015 respectively. The total cost of electricity in 2017 was US$ 29,650 approximately 6% and 18% more than the cost in 2016 and 2015 respectively. The quantity of LPG used in 2017 was 21.2 tonnes at a cost of US$22,371.

METHODOLOGY

Energy Audit was to identify when, how, where, and why energy is used in Accra Academy and recommend ways to ensure energy efficiency. Renewable energy deployment assessment was to calculate the financial benefits of a switch in energy type from conventional to clean energy. Alternative Energy Choices Grid Electricity Solar Power LPG Biogas

Administration 19% Classrooms 12% Kitchen 22% Halls 24% Bungalows 23%

ENERGY CONSUMPTION DISTRIBUTION OF ACCRA ACADEMY BY DEPARTMENTS

Administration Classrooms Kitchen Halls Bungalows

Computer 11% Air conditioners 9% Refrigeration 25% Light bulb 9% Television 2% Audio player 1% Iron 9% Fan 23% Mill & Motors 10% Others 1%

ENERGY CONSUMPTION DISTRIBUTION PER APPLIANCES

Inductive Load 60% Resistive Load 40%

INDUCTIVE vs RESISTIVE LOAD PROPORTION IN ACCRA ACADEMY

Inductive Load Resistive Load

SOLAR ENERGY ASSESSMENT

57.50 63.11 68.77 72.89 77.27 81.90 86.82 92.03

0.00 10.00 20.00 30.00 40.00 50.00 60.00 70.00 80.00 90.00 100.00 50 100 150 200 250

2015 2016 2017 2018 (Projected) 2019 (Projected) 2020 (Projected) 2021 (Projected) 2022 (Projected) QUANTITY OF ELECTRICITY CONSUMED, MWh COST OF ELECTRICITY, GHS

Thousands

YEAR

QUANTITY/COST OF GRID ELECTRICITY CONSUMPTION

SOLAR vs GRID

20 40 60 80 100 120

2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037

ANNUAL ENERGY CONSUMPTION/PRODUCTION, MWH YEAR

SOLAR ENERGY PRODUCTION vs GRID ENERGY CONSUMPTION COMPARISON

Grid Power Usage Projection Solar Power Projection

BIOGAS SYSTEM ANALYSIS―51% LPG REPLACEMENT

• 5,000

10,000 15,000 20,000 25,000 30,000 35,000 40,000 18000 19000 20000 21000 22000 23000 24000 2016 2017 2018 2019 2020 2021 2022

COST OF LPG, $ QUANTITY OF LPG, KG

YEAR

LPG CONSUMPTION PROJECTION FOR 5 YEARS

Quantity of LPG used Cost of LPG used

PROJECT SUMMARY

System IRR Percentage Replacement Payback, yr Solar with batteries 15% 100% 8 Biogas 22% 51% 4.2

CO2 ABATED

873 tCO2–e emission abatement over 25 years

What is EE? Why going purely solar is not enough? Areas with greatest opportunity for energy saving

Energy Efficiency (EE)

Active Measures

Refrigeration Fan Milling motors Extensive metering Switches

Passive Measures

Skylight Awning Encourage louvre windows Discourage aluminium roofing Window film

Assessing the cost existing building retrofit versus new NZEB Energy Policies The role of MWH and public buildings

The way forward NZEB in Ghana