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978-1285075600 Chapter 1
1 RESIDENTIAL ENERGY BASICS ANSWERS TO TEXTBOOK QUESTIONS AND EXERCISES 1. It is important to surround a person with warm surfaces so the person can benefit from the radiant heat emitted by the surfaces. Surfaces with high thermal mass can […]
978-1285075600 Chapter 10
10 ANTIFREEZE-PROTECTED SOLAR COMBISYSTEMS ANSWERS TO TEXTBOOK QUESTIONS AND EXERCISES 1. Propylene glycol is a nontoxic chemical used in food, pharmaceutical, and personal care products. Ethylene glycol is the base of most automobile antifreeze solutions, and it has moderate toxicity. […]
978-1285075600 Chapter 11
11 DRAINBACK-PROTECTED SOLAR COMBISYSTEMS ANSWERS TO TEXTBOOK QUESTIONS AND EXERCISES 1. Unpressurized drainback-protected solar combisystems do not require an expansion tank within the unpressurized portion of the system. They also do not require a pressure relief valve. Unpressurized tanks are […]
978-1285075600 Chapter 12
1 2 ESTIMATING SOLAR COMBISYSTEM PERFORMANCE USING THE F-CHART METHOD ANSWERS TO TEXTBOOK QUESTIONS AND EXERCISES 1. Estimating the monthly or annual heat delivery from a solar combisystem is complex because there are many variables that affect the results, and […]
978-1285075600 Chapter 13
1 3 AIR-TO-WATER HEAT PUMP SYSTEMS ANSWERS TO TEXTBOOK QUESTIONS AND EXERCISES 1. The source is the low temperature material from which heat is absorbed. The sink is the high temperature material to which heat is delivered. 2. The ultimate […]
978-1285075600 Chapter 14
1 4 WATER-TO-WATER GEOTHERMAL HEAT PUMP SYSTEMS ANSWERS TO TEXTBOOK QUESTIONS AND EXERCISES 1. Water-to-water heat pumps use many of the same components as air-to-water heat pumps, such as a compressor, refrigerant-to-water heat exchanger, reversing valve, and thermal expansion valve. […]
978-1285075600 Chapter 15
1 5 WOOD-FIRED AND PELLET-FIRED HYDRONIC SYSTEMS ANSWERS TO TEXTBOOK QUESTIONS AND EXERCISES 1. During the 1900s, Americans moved away from using wood as their primary fuel when methods for extracting and transporting fossil fuels and electricity became available. The […]
978-1285075600 Chapter 16
16 ECONOMIC EVALUATION METHODS AND TOOLS ANSWERS TO TEXTBOOK QUESTIONS AND EXERCISES 1. (a) M = $ 247.21 (b) M = $ 178.72 (c) M = $ 112.26 2. To answer this question, we need to choose a time duration […]
978-1285075600 Chapter 2
2 SPACE HEATING AND DOMESTIC WATER HEATING LOADS ANSWERS TO TEXTBOOK QUESTIONS AND EXERCISES 1. The temperature difference across the material is 68-5=63 degrees F. The area across which heat flows is 14×8= 112 sq. ft. The effective R-value of […]
978-1285075600 Chapter 3
3 UNIVERSAL HYDRONIC CONCEPTS ANSWERS TO TEXTBOOK QUESTIONS AND EXERCISES 1. An expansion tank accommodates expected pressure changes associated with water heating and cooling. A pressure relief valve opens if the pressure exceeds the desired maximum, protecting the entire system […]
978-1285075600 Chapter 4
4 ESSENTIAL HYDRONIC HARDWARE ANSWERS TO TEXTBOOK QUESTIONS AND EXERCISES 1. False. A conventional boiler is intended to operate so that water vapor does not condense on a sustained basis. However, given the right conditions, any boiler is able to […]
978-1285075600 Chapter 5
5 LOW TEMPERATURE HEAT EMITTERS AND DISTRIBUTION SYSTEMS ANSWERS TO TEXTBOOK QUESTIONS AND EXERCISES 1. Heat emitters that operate at low water temperatures are essential in systems using renewable energy heat sources because they allow them to operate at higher […]
978-1285075600 Chapter 6
6 CONTROL PRINCIPLES AND HARDWARE ANSWERS TO TEXTBOOK QUESTIONS AND EXERCISES 1. The control differential is the desired temperature difference between when the controller output turns on and when it turns off. The operating differential is the actual temperature range […]
978-1285075600 Chapter 7
7 SOLAR FUNDAMENTALS ANSWERS TO TEXTBOOK QUESTIONS AND EXERCISES 1. The cyclical use of solar energy in North America follows the price of conventionally- sourced energy. When oil prices rose, such as happened in the late 1970s during the Arab […]
978-1285075600 Chapter 8
8 SOLAR THERMAL COLLECTORS ANSWERS TO TEXTBOOK QUESTIONS AND EXERCISES 1. The coating on the upper surface of an absorber plate should have as low an emissivity as possible to reduce the amount of heat that is emitted outward from […]
978-1285075600 Chapter 9
9 THERMAL STORAGE TANKS ANSWERS TO TEXTBOOK QUESTIONS AND EXERCISES 1. An unpressurized thermal storage tank would be preferred to a pressurized tank if the installation hardware budget is very low. They are less expensive than pressurized tanks on a […]
978-1285075600 Test Bank Chapter 1
Name: Class: Date: chapter 1 Copyright Cengage Learning. Powered by Cognero. Page 1 Indicate whether the statement is true or false. 1. Thermal radiation is electromagnetic energy. a. True b. False 2. The primary method of heat loss from a […]
978-1285075600 Test Bank Chapter 10
Name: Class: Date: chapter 10 Copyright Cengage Learning. Powered by Cognero. Page 1 Indicate whether the statement is true or false. 1. Solar collector efficiency is higher under higher fluid inlet temperatures. a. True b. False 2. Collector absorber plate […]
978-1285075600 Test Bank Chapter 11
Name: Class: Date: chapter 11 Copyright Cengage Learning. Powered by Cognero. Page 1 Indicate whether the statement is true or false. 1. The use of drainback protection (rather than antifreeze protection) involves a thermal penalty associated with the use of […]
978-1285075600 Test Bank Chapter 12
Name: Class: Date: chapter 12 Copyright Cengage Learning. Powered by Cognero. Page 1 Indicate whether the statement is true or false. 1. Practical solar combisystem designs minimize excess energy gain in summer. a. True b. False 2. The system of […]
978-1285075600 Test Bank Chapter 13
Name: Class: Date: chapter 13 Copyright Cengage Learning. Powered by Cognero. Page 1 Indicate whether the statement is true or false. 1. Air-to-water heat pumps always have an external circulator to support flow through the heat pump. a. True b. […]
978-1285075600 Test Bank Chapter 14
Name: Class: Date: chapter 14 Copyright Cengage Learning. Powered by Cognero. Page 1 Indicate whether the statement is true or false. 1. An automatic backwash filter uses permanent stainless steel filter media. a. True b. False 2. The heating capacity […]
978-1285075600 Test Bank Chapter 15
Name: Class: Date: chapter 15 Copyright Cengage Learning. Powered by Cognero. Page 1 Indicate whether the statement is true or false. 1. A wood gasification boiler is a single-stage device. a. True b. False 2. The purpose of refractory bricks […]
978-1285075600 Test Bank Chapter 16
Name: Class: Date: chapter 16 Copyright Cengage Learning. Powered by Cognero. Page 1 Indicate whether the statement is true or false. 1. Recurring expenses for operating a renewable energy heating system vary from year to year. a. True b. False […]
978-1285075600 Test Bank Chapter 2
Name: Class: Date: chapter 2 Copyright Cengage Learning. Powered by Cognero. Page 1 Indicate whether the statement is true or false. 1. An advantage of using heating load estimating software is that calculations may be saved for future use. a. […]
978-1285075600 Test Bank Chapter 3
Name: Class: Date: chapter 3 Copyright Cengage Learning. Powered by Cognero. Page 1 Indicate whether the statement is true or false. 1. An air separator should be located at the point in the system where fluid temperatures are lowest. a. […]
978-1285075600 Test Bank Chapter 4
Name: Class: Date: chapter 4 Copyright Cengage Learning. Powered by Cognero. Page 1 Indicate whether the statement is true or false. 1. PEX tubing has lower temperature-pressure ratings than HDPE tubing. a. True b. False 2. Gate valves are designed […]
978-1285075600 Test Bank Chapter 5
Name: Class: Date: chapter 5 Copyright Cengage Learning. Powered by Cognero. Page 1 Indicate whether the statement is true or false. 1. All renewable energy heat sources function at higher thermal efficiency when matched with high-water-temperature heat emitters. a. True […]
978-1285075600 Test Bank Chapter 6
Name: Class: Date: chapter 6 Copyright Cengage Learning. Powered by Cognero. Page 1 Indicate whether the statement is true or false. 1. A nonlinear relationship between heat output and flow rate represents a more challenging design condition than a linear […]
978-1285075600 Test Bank Chapter 7
Name: Class: Date: chapter 7 Copyright Cengage Learning. Powered by Cognero. Page 1 Indicate whether the statement is true or false. 1. Building orientation could not be determined before the advent of detailed satellite imaging. a. True b. False 2. […]
978-1285075600 Test Bank Chapter 8
Name: Class: Date: chapter 8 Copyright Cengage Learning. Powered by Cognero. Page 1 Indicate whether the statement is true or false. 1. Most solar collectors use glass with low iron oxide content for their glazing. a. True b. False 2. […]
978-1285075600 Test Bank Chapter 9
Name: Class: Date: chapter 9 Copyright Cengage Learning. Powered by Cognero. Page 1 Indicate whether the statement is true or false. 1. Repurposed propane tanks can be used in both open and closed hydronic systems. a. True b. False 2. […]