Geothermal System Design Overview Course 1

Transcription

1 Geothermal System Design Overview Course 1 10:00-11:00 AM WS1 1

2 EggGeothermal Consulting NYSERDA Provider Number 1034 Geothermal Heating and Cooling Technology and Applications NYGEO-2017 A-D Jay Egg, CMC 2

3 Credit(s) earned on completion of this course will be reported to AIA CES for AIA members. Certificates of Completion for both AIA members and non-aia members are available upon request. This course is registered with AIA CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation. 3

4 Copyright Materials This presentation is protected by US and International Copyright laws. Reproduction, distribution, display and use of the presentation without written permission of the speaker is prohibited. EggGeothermal Consulting

5 Course Description This course will outline the basic concept of geothermal-assisted heating and cooling. Using clear and basic pictures and principles, the student will learn how it is that all of the heating or cooling needed for an application can come from the renewable and sustainable temperature of the earth beneath the home or building. Geothermal heating, ventilation, and airconditioning (HVAC) incorporates all the concepts and principals of HVAC. This chapter will touch on many of the fundamental principles of HVAC engineering. It will delve deeply into hydronic applications. Because ground-sourced heating and cooling systems primarily use an earth fluid loop of some sort, hydronic-based heating and cooling becomes the fundamental core of geothermal HVAC technologies. 5

6 Learning Objectives At the end of the this course, participants will be able to: 1. Understand, apply and evaluate the benefits of geothermal systems types to buildings 2. Understand, apply and evaluate the benefits geothermal systems to the environment 3. Understand, apply and evaluate the benefits geothermal systems toward reducing energy consumption 4. Understand, apply and evaluate the benefits various geothermal systems toward longevity of equipment 6

7 It may be hard for an egg to turn into a bird: it would be a jolly sight harder for it to learn to fly while remaining an egg. We are like eggs at present. And you cannot go on indefinitely being just an ordinary, decent egg. We must be hatched or go bad. C.S. Lewis

8 A geothermal system utilizes all types of heat transfer 8

9 Applying the Laws of Thermodynamics to Geothermal Heat Pumps and Indoor Thermal Comfort 9

10 Forced air Wall radiators In floor heating 10

11 Understanding the refrigeration cycle 11

12 Calculating heating and cooling loads 12

13 Manual and Simplified (Time Consuming) 13

14 Automated (Better) Associated Ground Exchanger Software criteria: The ground loop is designed applying ASHRAE methodology, but runs the heat pump equipment in each building zone hourly not once a year at max load conditions. ASHRAE design conditions and 8760 climate libraries are built-in saving time and improving accuracy. Calculates the energy cost of each building zone during the ground loop design. Analyses the payback years for excess design contingency immediately, so the designer can determine the cost of recovery of the installed ground loop. Operates the heat pump equipment in a realistic manner changes from 1st stage to 2nd stage, or variable speed at the appropriate hour of operation. Applies to residential and commercial projects, and is the only design method that meets the commercial standard ANSI/CSA C448-Series

15 Hourly Data Geothermal Heat Pump Design Simulation and Analysis will provide an accurate basis for determining the cost of recovery of the installed ground loop. The Koop method runs the heat pump equipment hourly in each individual zone and calculates the energy operating cost of each building zone during the ground loop design, so the payback years for excess design contingency can immediately be evaluated. This method applies to residential and commercial projects, and is the only commercial design method that meets the standard ANSI/CSA C448- Series

16 The effect of air flow and insulation 16

17 How comfort is measured 17

18 Psychrometric Key 18

19 Thermodynamics and HVAC Systems 19

20 Less Energy to move BTUs in Water 20

21 Understanding efficiency 21

22 Efficiency Ratings: EER and COP Energy Efficiency Rating (EER) is often used for Cooling Efficiency EER is the is the Net Cooling Capacity/Applied Energy in watts Coefficient of Performance (COP) is often used for Heating Efficiency COP is the BTUs delivered/btus consumed EER = COP x watt of electricity = BTU 22

23 Efficiency Ratings: COP 2.1 kwh consumed 7200 BTU from the grid 28,800 BTU from the Earth 3 tons / BTUH Load 36,000 BTUH Delivered 10.5 kw of Heat 3 ton GHP = BTUH Consumes 7200 BTUH, or 2110 watts (7200/3.412) Delivers 36,000 BTU, or 10,550 watts of heat 36,000/7200= 5.0 COP 5.0 COP(x3.412)=17 EER This 3 ton GHP generates = 8440 watts of energy each hour it runs EER = COP x watt of electricity = BTU 23

24 Efficiency Rating: EER 3 ton GHP = BTUH Consumes 2110 watts Moves 36,000 BTU, or 10,550 Watts back into the Earth 36,000 BTU/2110 w = 17 EER 17 EER(/ 3.412) = 5 COP EER = COP x watt of electricity = BTU 24

25 Understanding efficiency 25

26 Hourly Bin Data 26