Geothermal Heat Pumps for Science Grade 9 PDF

GEOTHERMAL HEAT PUMPS for SCIENCE Grade 9 Quarter 3 / Week 4 NegOr_Q3_Science9_SLKWeek4_v2 NegOr_Q3_Science9_SLKWeek4_v2 1  FOREWORD This self-learning kit will serve as a guide in gaining in- d...

GEOTHERMAL HEAT PUMPS for SCIENCE Grade 9 Quarter 3 / Week 4 NegOr_Q3_Science9_SLKWeek4_v2 NegOr_Q3_Science9_SLKWeek4_v2 1  FOREWORD This self-learning kit will serve as a guide in gaining in- depth knowledge about geothermal heat pumps. In this learning kit the students will gain knowledge on how the geothermal heat pump works and its corresponding processes. This self-learning kit includes a variety of pre-learning activities which will help you later in determining how much you have learned about the concepts. Further, you will be answering a short-itemed test that will assess your learnings based on the given competency. Good luck and have fun science learning. NegOr_Q3_Science9_SLKWeek4_v2 2  OBJECTIVES At the end of this lesson, the learners will be able to: K: define geothermal heat pump; S: explain how electricity is produced using the geothermal heat pump; and A: appreciate the importance of geothermal energy by drawing or sketching how energy is transformed to generate electricity in a geothermal heat pump. LEARNING COMPETENCY Illustrate how energy from volcanoes may be tapped for human use. (S9ES –IIIc-d-29) I. WHAT HAPPENED Essential Questions: 1. What is geothermal energy and how does it work? LLC, Clever Prototypes. n.d. “Geothermal Energy Storyboard by 8c54c414.” Storyboard That. NegOr_Q3_Science9_SLKWeek4_v2 3 PRE-ACTIVITIES/PRE-TEST Multiple Choice Directions: Choose the letter of the best answer and write it in your notebook. 1. Geothermal heat pump is also called as ________________. A. geothermal energy B. ground source heat pump C. flash steam D. dry steam 2. Which part of the geothermal heat pump absorbs heat from the surrounding fluid? A. Expansion device C. Condenser B. Compressor D. Evaporator 3. Which part of the geothermal heat pump rejects the absorbed heat to its surrounding fluid and condenses to form a high pressure, high temperature liquid? A. expansion device C. Evaporator B. Condenser D. Compressor 4. This system transfers heat by pumping water through pipes just below the Earth’s surface. A. Close loop system C. geothermal power plant B. Open loop system D. geothermal heat pumps 5. What will happen to the refrigerant liquid? A. It will be compressed into high temperature, high pressure gas B. It will be expanded in the expansion device. C. It will form a low- temperature low, pressure liquid. D. It will condense to form a high pressure, high temperature liquid. NegOr_Q3_Science9_SLKWeek4_v2 4 II. WHAT I NEED TO KNOW DISCUSSION Geothermal heat pumps are also called ground source heat pumps. These systems can be used for heating and cooling buildings virtually anywhere, especially in regions where the geothermal potential is low. The internal heat energy of the Earth and the insulation from surface rocks and soils keep the subsurface at a near constant temperature of about 13 0 C (550 F). Wells are drilled to access the ground water at this temperature, and two types of systems can be employed: 1. Open loop system simply pulls water up, run it through the heat pump to add heat in summer, and remove heat in the winter, and then recycles it back into the aquifer. 2. Closed-loop system has the same function, except a loop of tubing is buried underground and filled with fluid, usually anti-freeze. These systems work well in areas with moderate climates. Supplemental heating and cooling systems are required in more extreme areas. Some consumers are resistant to geothermal heat pumps due to high initial purchase and installation cost. However, all geothermal heat pumps eventually provide savings on normal utility bills, some in as little as 3 or 4 years. Geothermal Heat Pumps differ from other uses of geothermal in some basic ways: 1. A geothermal heat pump system is installed near the surface of the earth, typically making use of the Earth’s heat at a depth of only 5 to 200 feet (1.5 m to 61 meters), NegOr_Q3_Science9_SLKWeek4_v2 5 whereas the geothermal systems covered in the previous lessons usually access Earth’s heat up to a mile or two (or more) below the surface. 2. A portion of the ground heat used by a geothermal heat pump is absorbed solar radiation, whereas the geothermal heat used to produce electricity are generated from geologic processes inside the earth. 3. A geothermal heat pump system does not depend on a geothermal reservoir. These geothermal systems can be used almost everywhere in the world. “Types of Geothermal Heat Pumps | Engineering360.” n.d. NegOr_Q3_Science9_SLKWeek4_v2 6  “Geothermal Heat Pump Systems in Charlottesville, va | W.E. Brown.” n.d. Accessed December 15, 2021. There are four basic components of the heat pumps: 1. Evaporator 2. Compressor 3. Condenser 4. Expansion device The low-temperature low-pressure liquid refrigerant in the evaporator absorbs heat from its surrounding fluid and evaporates to become a low-pressure low-temperature vapor. This refrigerant vapor is then compressed into high temperature, high-pressure gas. In the condenser, this gas rejects heat to its surrounding fluid and condenses to form a high-pressure high-temperature liquid. The fluid to which it rejects heat is heated and can be used for various useful NegOr_Q3_Science9_SLKWeek4_v2 7 purposes. The refrigerant liquid is then expanded in the expansion device, such as a capillary tube or thermostatic expansion valve, to form a low-temperature low-pressure liquid (actually, a liquid-vapor mixture) which then goes to the evaporator and the cycle repeats. “Ground Source Heat Pump - BASIX (Building Sustainability Index).” n.d. How it Works? 1. Water or a refrigerant move through a loop of pipes. 2. When the weather is cold, the water or refrigerant heats up as it travels through the part of the loop that is buried. 3. Once it gets back above ground, the warmed water or refrigerant transfers heat into the building. 4. The water or refrigerant cools down after its heat is transferred. It is pumped back underground where it heats up once more, starting the process again. 5. On a hot day, the system can run in reverse. The water or refrigerant cools the building and then pumped NegOr_Q3_Science9_SLKWeek4_v2 8 underground where extra heat is transferred to the ground around the pipes. US. 2017. “Geothermal Energy | a Student’s Guide to Global Climate Change | US EPA.” EPA.GOV. May 9, 2017. It may be familiar to us and we may not be using it in our respective homes, but for future purposes, it is just right for us to be aware of the great benefits we get from geothermal heat pumps. The electricity consumed in geothermal heat pumps is 25% to 50% less than conventional heating or cooling systems. This means that one unit of electricity is used to move three units of heat from the earth. III. WHAT I HAVE LEARNED EVALUATION/POST TEST Directions: Choose the letter of the correct answer and write it in your notebook. 1. Which part of the geothermal heat pump absorbs the heat from the surrounding fluid? A. Compressor C. Condenser B. Evaporator D. expansion device NegOr_Q3_Science9_SLKWeek4_v2 9 2. What do you call the absorbed heat which is compressed into high temperature, high pressure gas? A. water vapor C. refrigerant liquid B. refrigerant vapor D. hot water 3. Which part of the geothermal heat pump rejects the absorbed heat to its surrounding fluid and condenses to form a high pressure high temperature liquid? A. expansion device C. Condenser B. Evaporator D. Compressor 4. What will happen to the refrigerant liquid? A. It will be expanded in the expansion device. B. It will be compressed into high temperature, high pressure gas. C. It will condense to form a high pressure, high temperature liquid. D. It will form a low- temperature low pressure liquid. 5. This system transfers heat by pumping water through pipes just below the Earth’s surface. A. geothermal power plants B. geothermal heat pumps C. Closed loop system D. Open-loop system NegOr_Q3_Science9_SLKWeek4_v2 10 REFERENCES “Benefits of Geothermal Heat Pump Systems.” n.d. CaliforniaGeo. https://www.californiageo.org/benefits-of-geothermal-heat- pump-systems/ “Geothermal Heat Pump Systems in Charlottesville, va | W.E. Brown.” n.d. Accessed December 15, 2021. https://webrown.com/geothermal “Ground Source Heat Pump - BASIX (Building Sustainability Index).” n.d. Basix.nsw.gov.au https://basix.nsw.gov.au/iframe/energy-help/heating-and- cooling/ground-source-heat-pump.html LLC, Clever Prototypes. n.d. “Geothermal Energy Storyboard by 8c54c414.” Storyboard That. https://www.storyboardthat.com/storyboards/8c54c414/geo thermal-energy “Types of Geothermal Heat Pumps | Engineering360.” n.d. Insights.globalspec.com. https://insights.globalspec.com/article/14041/types-of- geothermal-heat-pumps “Types of Geothermal Heat Pumps | Engineering360.” n.d. Insights.globalspec.com. Accessed December 14, 2021. https://insights.globalspec.com/article/14041/types-of- geothermal-heat-pumps US. 2017. “Geothermal Energy | a Student’s Guide to Global Climate Change | US EPA.” EPA.GOV. May 9, 2017. https://archive.epa.gov/climatechange/kids/solutions/techn ologies/geothermal.html “US. 2017. “Geothermal Energy | a Student’s Guide to Global Climate Change | US EPA.” EPA.GOV. May 9, 2017. https://archive.epa.gov/climatechange/kids/solutions/techn ologies/geothermal.html NegOr_Q3_Science9_SLKWeek4_v2 11  DEPARTMENT OF EDUCATION SCHOOLS DIVISION OF NEGROS ORIENTAL SENEN PRISCILLO P. PAULIN, CESO V Schools Division Superintendent JOELYZA M. ARCILLA EdD OIC - Assistant Schools Division Superintendent MARCELO K. PALISPIS EdD JD OIC - Assistant Schools Division Superintendent NILITA L. RAGAY, EdD OIC - Assistant Schools Division Superintendent/CID Chief ROSELA R. ABIERA Education Program Supervisor – (LRMDS) ARNOLD R. JUNGCO PSDS – Division Science Coordinator MARICEL S. RASID Librarian II (LRMDS) ELMAR L. CABRERA PDO II (LRMDS) ANGELYN P. ABUEVA Writer ANGELYN P. ABUEVA JANICE G. BERO Illustrators/Lay-out Artists _________________________________ ALPHA QA TEAM LESTER C. PABALINAS ARGELYN A. MAHUMOT JULIET B. GANTALAO BETA QA TEAM ZENAIDA A. ACADEMIA ALLAN Z. ALBERTO EUFRATES G. ANSOK JR. ROWENA R. DINOKOT LESTER C. PABALINAS DISCLAIMER The information, activities and assessments used in this material are designed to provide accessible learning modality to the teachers and learners of the Division of Negros Oriental. The contents of this module are carefully researched, chosen, and evaluated to comply with the set learning competencies. The writers and evaluator were clearly instructed to give credits to information and illustrations used to substantiate this material. All content is subject to copyright and may not be reproduced in any form without expressed written consent from the division. NegOr_Q3_Science9_SLKWeek4_v2 12 SYNOPSIS This Self-Learning Kit gives emphasis on concepts about earthquake and faults. This will provide the Grade 9 learners concepts and facts about the Geothermal Heat Pumps and its corresponding processes. In addition, this Self-Learning Kit will enhance learner’s critical thinking and analysis skills through sketching and flow chart completion activity, ABOUT THE AUTHOR ANGELYN P. ABUEVA is a Secondary School Teacher III of Mabinay Science High School, Mabinay, Negros Oriental. She has been teaching for nine years in the said institution. She graduated Bachelor of Secondary Education major in Biological Sciences at Negros Oriental State University. NegOr_Q3_Science9_SLKWeek4_v2 13