Experimental assessment of combining geothermal with conventional air conditioner regarding energy consumption in summer and winter

Hazim Najim Al-Deen,Ahmed Al-Samari

doi:10.24237/djes.2021.14308

Hazim Najim Al-Deen, Ahmed Al-Samari

Open Access

https://doi.org/10.24237/djes.2021.14308

Copy DOI

Abstract

The objectives of this study is to evaluate the use of geothermal energy combined with conventional air-conditioner (A/C) and its contribution to reducing dependence on electrical energy. Assessment of geothermal sources in Diyala governorate. This experiment includes installing a combined system in the test room. The indoor and outdoor temperatures and relative humidity were calculated, as well as the calculation of borehole temperature, in addition to the energy efficiency ratio (EER) and coefficient of performance (COP) of the systems. The amount of electricity consumption in kWh was calculated. The most important findings in this experiment are: (1) The temperature of the well at a depth of (6m) is almost constant throughout the year, about 24. (2) Using the geothermal system alone in the test-room reduces the average indoor temperature by 8 within one day. (3) Iraq can benefit from the important geothermal energy and its sources, however, its use is still very limited and limited to scientific research only. (4) The experiment proved that the EER and COP of the geothermal system, the combined system and the window-type air-conditioner are 18.9, 9.8, 9.4, 5.54, 1.9 and 1.52 respectively.

Highlights

The energy crisis is considered one of the most important challenges facing humanity, along with wars, poverty, famine and others
This goal stipulated a reduction in energy use by an amount of 20% in European Union (EU) countries, increasing the use of renewable energy by 20% of the total energy used in the EU, and increasing energy efficiency by 20%
This study found the NPV of the geothermal probe installed into a ground water borehole is positive

Summary

Introduction

The energy crisis is considered one of the most important challenges facing humanity, along with wars, poverty, famine and others. The second step that must be taken to reduce energy consumption is to increase the energy efficiency of cars and systems and make greater use of renewable energy sources [1]. The European Union (EU) has taken binding measures for its members, in accordance with the Kyoto Protocol, which stipulated that the global temperature rise by (2°C) should be reduced by reaching the 20/20/20 target in 2020. This goal stipulated a reduction in energy use by an amount of 20% in EU countries, increasing the use of renewable energy by 20% of the total energy used in the EU, and increasing energy efficiency by 20%. By the year 2030, the EU aspires to achieve a reduction in greenhouse gases (GHG) emissions by 40% less than in 1990, energy savings greater or equal to 27%, and the use of renewable energy such as geothermal energy, wind, etc., by at least 27% [1, 2]

Objectives

Methods

Results