EVALUATION OF NEAR-NET-ZERO-ENERGY BUILDING STRATEGIES: A CASE STUDY ON RESIDENTIAL BUILDINGS IN JORDAN

Hikmat H Ali,Fahmi A Abu Al-Rub,Bashar Shboul,Hind Al Moumani

doi:10.32479/ijeep.10107

Abstract

Residential buildings contribute a significant share of energy consumption in Jordan, consuming 23% of total energy demand. It is the highest electrical energy consuming sector in Jordan, where it accounted for approximately 43% of the total electricity consumption in the year 2016. Therefore, improving the energy performance of existing residential buildings in Jordan is likely to reduce energy usage (approach net zero energy) and would be a means to minimizing national electrical consumption. A typical house model located in Irbid is selected as a case study for the near zero energy design and saving energy objective. The study investigates the economic and computational potential of various integrated passive and active design systems for the Jordanian residential building sector, by focusing on several parameters including orientation, layout, type of insulation, type of windows, shading system, type of ventilation system which used a comprehensive and detailed model of the Natural Convection Air-Cooled Condenser integrated to stack (NCACC) as new efficient ventilation method, and using of two renewable energy technologies; PV and flat plate solar thermal collector during the design of the buildings. This study uses three-strategies of building energy analysis in order to achieve near Net Zero Energy Building (nNZEB) in Irbid, Jordan. Two approaches (computational and analytical) could be utilized for the identification of energy building performance analysis. A dynamic building energy modeling and simulation software with different climatic conditions was utilized to identify the best building energy model. A suitable economic evaluation criterion was used to estimate the payback period of all systems applied.

Highlights

A Nearly Net Zero Energy Building is a building that has optimum energy performance (Rezaie et al, 2013) (D’Agostino and Mazzarella, 2019) and should meet its energy requirements largely amount from renewable sources produced on-site or nearby (Department of the Environment, 2012)
This study uses three-strategies of building energy analysis in order to achieve near Net Zero Energy Building in Irbid, Jordan
Set of parameters have been considered in order to achieve maximum efficiency of near Net Zero Energy Building (nNZEB): layout, orientation, and window to wall ratio (WWR)

Summary

Introduction

A Nearly Net Zero Energy Building (nNZEB) is a building that has optimum energy performance (Rezaie et al, 2013) (D’Agostino and Mazzarella, 2019) and should meet its energy requirements largely amount from renewable sources produced on-site or nearby (Department of the Environment, 2012). The study encompassed five renewable energy technologies, two on-site options: PV and micro combined. Et al.: Evaluation of Near-net-zero-energy Building Strategies: A Case Study on Residential Buildings in Jordan heat and power, and three off-site options: off-site windmill, the share of a windmill farm and purchase of green energy from a 100% renewable utility grid. The net-zero energy residential building studied in this research utilizes PV modules to offset the electricity cost purchased from the grid Wittchen et al (2010) utilized two on-site renewable technologies: PV and flat solar thermal panels in order to generate energy needed to meet the nNZEB. The study found that this technology is the most appropriate and commonly used in Denmark (Wittchen et al, 2010)

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