Bissoy.com
Doctors Medicines MCQs Q&A

What are the general comfort conditions in an air-conditioning system?

What are the general comfort conditions in an air-conditioning system? Correct Answer 24°C DBT, 60% RH

Explanation:

Effective temperature 

  • It is the temperature of saturated air at which a person or human being would feel the same level of comfort as in the actual environment.
  • It includes comfort temperature, velocity, and purity.

Factors affecting the effective temperature

Climatic and seasonal differences

  • People living in a warmer region feel comfortable at higher effective temperatures than people living in a colder region.
  • In summer the effective temperature is 21.6°C and in the case of winter, the optimum effective temperature is 20°C.

Age and Gender

  • Children and old age persons need 2-3°C higher effective temperature in comparison to adults. Same the case is with the women.

Kind of activity

  • If a person is involved in the foundry shop, dancing or jogging, etc needs a lower effective temperature in comparison to the person in the rest.

Density of occupants

  • Highly densely occupied needs a lower effective temperature in comparison to the less densely occupied.

Comfort chart

[ alt="F1 Krupalu 12.1.20 Pallavi D23" src="//storage.googleapis.com/tb-img/production/20/10/F1_Krupalu_12.1.20_Pallavi_D23.png" style="width: 309px; height: 195px;">

Figure: Comfort chart

[ height="41px" src="" width="280px"> 

  • ASHRAE (American Society of Heating Refrigeration and  Air conditioning Engineers), conducted a survey on different kinds of people subjected to a wide range of environmental temperature conditions, humidity purity, and air velocity and developed the above comfort chart. 
  • If the value of relative humidity is above 60%, then the tendency of sticky sensation develops and if the value of relative humidity is less than 50%, then the skin surface is too dry. So the relative humidity for comfort air conditioning is 60%.

Related Questions

The question below consists of a set of labelled sentences. Out of the four options given, select the most logical order of the sentences to form a coherent paragraph. P- To those who have known comfort, discomfort is a real torture. Q- Comfort is now one of the causes of its own spread. R- The more comfort is brought into the world, the more it is likely to be valued. S- It has now become a physical habit, a fashion, an ideal to be pursued for its own sake.
The question below consists of a set of labelled sentences. Out of the four options given, select the most logical order of the sentences to form acoherent paragraph.
P- To those who have known comfort, discomfort is a real torture.
Q- Comfort is now one of the causes of its own spread.
R- The more comfort is brought into the world, the more it is likely to be valued.
S- It has now become a physical habit, a fashion, an ideal to be pursued for its own sake.
The following question consists of six sentences of a passage. The first and the sixth sentences are given in the beginning as S1 and S6. The middle four sentences in each have been jumbled up and labelled P, Q, R and S. You are required to find the proper sequence of the four sentences and mark your response accordingly. S1: It would be possible to adduce many examples showing what could be done with the limited means' at our ancestor’s disposal in the way of making life comfortable. S6: I hope, in this essay, to make that connection manifest. P: What have comfort and cleanliness to do with politics, morals, and religion? Q: But look more closely and you will discover that there exists the closest connection between the recent growth of comfort and the recent history of ideas. R: They show that if they lived in filth and discomfort, it was because filth and discomfort fitted in with their principles, political, moral and religious. S: At a first glance one would say that there could be no causal connection between arm chairs and democracies, sofas and the family system, hot baths and religious orthodoxy. The correct sequence should be
Statement (I): Effective temperature is an index which correlates the combined effect of air temperature, air humidity and air movement upon human thermal comfort. Statement (II): Thermal comfort is not affected by mean radiant temperature. 
As an index of comfort, the temperature of saturated air at which a person would experience the same feeling of comfort as experienced in the actual unsaturated environment is called the
In the following question, sentences of a paragraph have been jumbled and labelled as A, B, C and D. You are required to rearrange the jumbled sentences of the paragraph and mark your response accordingly by selecting the correct option. A: Air conditioning is the process of removing heat and moisture from the interior of an occupied space to improve the comfort of occupants. Air conditioning can be used in both domestic and commercial environments.  B: Electric refrigerant-based AC units range from small units that can cool a small bedroom, which can be carried by a single adult, to massive units installed on the roof of office towers that can cool an entire building. C: Air conditioners often use a fan to distribute the conditioned air to an enclosed space such as a building or a car to improve thermal comfort and indoor air quality.  D: This process is most commonly used to achieve a more comfortable interior environment, typically for humans and other animals.
The increase in meta centric heighti) increases stabilityii) decreases stabilityiii) increases comfort for passengersiv) decreases comfort for passengersThe correct answer is
The increase in meta centric height
i) increases stability
ii) decreases stability
iii) increases comfort for passengers
iv) decreases comfort for passengers
The correct answer is
Which one of the following four addresses is NOT EXACTLY the same as the one given below? Beauty Mountain Whitewater Trippers, Inc. General Delivery Edmond, West Virginia 25837 (304) 574-­0211  (i) Beauty Mountain Whitewater Trippers, Inc. General Delivery Edmond, West Virginia 25837 (304) 574­-0211  (ii) Beauty Mountain Whitewater Trippers, Inc. General Delivery Edmond, West Virginia 25837 (304) 574-­0211 (iii) Beauty Mountain Whitewater Trippers, Inc.  General Delivery Edmond, West Virginia 25837 (304) 574-­0211   (iv) Beauty Mountain Whitewater Trippers, Inc.  General Deliver  Edmond, West Virginia 25837 (304) 574­0211 
Consider the following statements about the Comptroller and Auditor General of India. 1. The office of the Comptroller and Auditor General in the Constitution of India is substantially modeled upon that of the Auditor-General of India Act, 1935. 2. The Comptroller and Auditor General may be removed only on an address from both Houses of Parliament on the grounds of 'proved misbehavior' or 'incapacity'. 3. The term of office of the Comptroller and Auditor General shall be five years from the date on which he assumes office. Which of the statements given above is/are correct?