question from the topic "Electric Heating and Heat Dissipation Methods". Q No.1: Explain the causes of...

question from the topic "Electric Heating and Heat Dissipation Methods".

Q No.1: Explain the causes of failures of heating elements. Why high frequency is not for the dielectric heating?

Expert Solution

one of the failure of the heating element is breaking of element or overheating of element due to overcurrent or overvoltage. This causes expansion or burning of the element. As heating is directly proportional to the square of current flowing through it when overcurrent occurs overheating of element takes place that can burn the element. Other problem with the heating element is oxidation that occurs due to the presence of air. This oxidation produces an oxide layer on the element that increases the resistivity of the element and hence affects the heating of the element.

High frequency is not used for the dielectric as the high frequency produces high induced emf and can cause further overheating due to the formation of high frequency current. It can also affect the nearby materials and produce eddy current in them and cause overheating of the material. Generally medium range of frequency is used in heating systems.

Manojponduru answered 1 year ago

Question 1: In areas of enhanced heat flow, geothermal heating can be used to supply heating...

Question 1: In areas of enhanced heat flow, geothermal heating can be used to supply heating to homes, either by using ground water directly or by placing a water reservoir at depth. In Iceland, where the average temperature over the year is 4.6ºC, the geothermal flux can be as high as 300 mW m-2. If you wanted to be able to supply a home with indoor temperature at 25ºC and water at a temperature of 55ºC, how deep would your...

When heating a pot of pasta on an electric stove as shown, which heat transfer mechanisms...

When heating a pot of pasta on an electric stove as shown, which heat transfer mechanisms are taking place? A: Only conduction from the electric heat element to the metal pan B: Only convection through the water in the pan C: Only radiation outward from the glowing heat element D: All three mechanisms are taking place

A counter-flow double-pipe heat exchanger is heating water from 20 to 80 C at a rate...

A counter-flow double-pipe heat exchanger is heating water from 20 to 80 C at a rate of 1.2 kg/s. The heating is provided by water at 160 C and a rate of 2 kg/s. The inner tube has a diameter of 1.5 cm, and the U is 640 W/m2 K. Use the effectiveness-NTU method to determine the length of the heat exchanger required.

. In 500 words or more, explain the topic. What causes stagflation and give examples of...

. In 500 words or more, explain the topic. What causes stagflation and give examples of occurrences in our economy. Relate this topic to the Phillip’s Curve and demonstrate why this is a problem to traditional Keynesian thought. What would you recommend to the Fed when stagflation comes calling?

An ammonia heat engine has the following reversible steps: 1 ? 2 Isothermal heating of saturated...

An ammonia heat engine has the following reversible steps: 1 ? 2 Isothermal heating of saturated liquid @ 60°C to superheated vapor 2 ? 3 Adiabatic expansion to saturated vapor at -20°C 3 ? 4 Isothermal cooling to a 2 phase fluid 4 ? 1 Adiabatic compression back to state 1 Find QH (in kJ/kg). Use the correct sign convention to indicate the direction of heat. Hint: build a T-S diagram of the whole cycle first.

A tutorial question and its suggested solution was: Q. There are two methods of calculating...

A tutorial question and its suggested solution was: Q. There are two methods of calculating ‘cash flow from operating activities’: the direct method (gross flows) and the indirect method (reconciliation). (a) Explain the difference between the two methods. (b) Which method is required by the Australian Accounting Standards? (c) Which method is preferable? Why? Solution: (a) The direct method or gross flows method shows the cash received and paid for the different operating activities. Typical...

Q#1:Explain the research methods versus methodology with the method and techniques to signify the research types...

Q#1:Explain the research methods versus methodology with the method and techniques to signify the research types (i.e., library research, field research and laboratory research)? Mention the references at the end. Solution to be typed up to 500 words.

Please I want explain for this topic in details Q)explain the discounted cash flow

These questions are from Hospitality Managerial Accounting course. Topic: Forecasting Methods True or False: 1. Moving...

These questions are from Hospitality Managerial Accounting course. Topic: Forecasting Methods True or False: 1. Moving average can be said to be a type of weighted moving average. True or False: 2. Trend is a repeating pattern in data. 3. Exponential smoothing method is just like weighted average, except that _______ are determined by a smoothing constant, alpha, and the number of periods considered is infinite.

Topic: Research Methods Question: Impact of social media on teenagers; Required; Chapter One 1.Introduction I. Statement...

Topic: Research Methods Question: Impact of social media on teenagers; Required; Chapter One 1.Introduction I. Statement of the problem II. Objectives of the study III.Research questions/Hypothesis IV. Significance of the study V. Scope of study VI. Organisation of the study Nb: please the solution should be as that of a reseach. It should follow the standard research paper guidelines. Thank you.

Question