2 edition of **Air-conditioning calculations with a computer program using transfer function method** found in the catalog.

Air-conditioning calculations with a computer program using transfer function method

D. W. C. Mak

- 119 Want to read
- 20 Currently reading

Published
**1982**
by UMIST in Manchester
.

Written in English

**Edition Notes**

Statement | Supervised by: Letherman, K.M.. |

Contributions | Letherman, K. M., Supervisor., Building Engineering. |

ID Numbers | |
---|---|

Open Library | OL19657801M |

Heating, ventilation, and air conditioning (HVAC) is the technology of indoor and vehicular environmental goal is to provide thermal comfort and acceptable indoor air system design is a subdiscipline of mechanical engineering, based on the principles of thermodynamics, fluid mechanics and heat transfer."Refrigeration" is sometimes added to . ii CERTIFICATE OF APPROVAL The thesis titled, " Study of performance of an Air-conditioning system and cooling load calculation by using developed software for a Building," submitted by Khandakar Mozammel Hossan, Roll No.: P, Session: April, has been accepted as satisfactory in partial fulfillment of the requirements for the degree of.

The calculation of real-time dynamic room cooling load can be solved effectively by soft sensing technology based on auxiliary variable. This paper studies on the relationships between room cooling loads at different reference temperatures, and presents the system equations for cooling load calculation based on soft by: 1. form, that is, calculations are presented as if calculated manually, although, of course, this is done in most cases in practice by computer programs. This manual presentation will give a better understanding of the underlying principles rather than just leaving the matter of load calculations as a simple data input exercise.

calculations or system model-ing often will dictate the type and depth of information that is needed for input into vari-ous software programs. These more in-depth subjects will be covered in the two remaining load estimating TDPs. Load estimates are the summation of heat transfer elements into (gains) or out of (losses) the spaces of a Size: KB. Load Estimating for Air Conditioning using Computer Software Approach design condition of C db (dry bulb) with maximum relative humidity of 50%RH is currently accepted as satisfactory indoor design criteria. Areas of the building perimeter with exterior glass and wall exposures have an air-conditioning load that includes solar gain.

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Equations may be solved in a computer program using succes-sive substitution, Newton techni ques, or (with linearized radi-ation) matrix methods.

The radiant time series method (Spitler et al. ) is a simplified method that does not solve the heat balance equa-tions. The method is “heat-balance based” to the extent that theFile Size: 3MB. The need for air conditioning was estimated by determining the cooling load.

The cooling load can be calculated by several methods based on the American Society of. Soteris A. Kalogirou, in Solar Energy Engineering (Second Edition), The transfer function method.

The ASHRAE Task Group on Energy Requirements developed the general procedure referred to as the transfer function method (TFM). This approach is a method that simplifies the calculations, can provide the loads originating from various parts of the building.

the transfer function method and the cooling load temperature difference method. Subsequent to the second edition,ASHRAE Technical CommitteeLoad Calcula-tions Data and Procedures, commissioned additional research led to the adaptation of the heat balance method for use in load calculation procedures and.

Applicability of calculation methods for conduction transfer function of building constructions wrote a program for computing transfer function coeﬃcients based upon the method of Stephenson and Mitalas. greatly reduce the required computational effort compared to other numerical techniques and facilitates computer implementation of Cited by: Design load calculation and system sizing for commercial buildings.

Load calculations use ASHRAE® Transfer Function Method. System components are sized using the System-Based Design concept, which applies the ASHRAE Heat Extraction Methodology to link system performance to building thermal loads.

After the air conditioning model is determined, the air conditioning sche duling scheme is calculated using the optimization al gorithm. This method belongs to the open-loop contro l, with intensive calc ulation, cannot achieve accurate control and real-time control which is based on load output change.

Air-conditioning calculations with a computer program using transfer function method book The research by Na et al., on the direct loadFile Size: 1MB. COOLING LOAD CALCULATIONS 7–1 Transfer Function Method (TFM) 7–1 Heat Source in Conditioned Space 7–2 Heat Gain from Occupants 7–3 Heat Gain from Cooking Appliances 7–6 Heat Gain from Medical Equipments 7–6 Heat Gain from Computer 7–6 Heat Gain from Office Equipments 7–6 CLTD/SCL/CLF Calculation ProcedureFile Size: 1MB.

program for a three story shop building. Key words: HVAC, CLTD, CLF, HAP, Cooling Load. 1 INTRODUCTION Cooling & heating load calculations are normally made to size HVAC (heating, ventilating, and air-conditioning) systems and their components. In principle, the loads are calculated to maintain the indoor design conditions.

A simulation program using the Weighting Factor Method calculates the heat transfer interaction, temperature distribution, and PMV level in three types of housing units in relation to the size.

Air Conditioning Calculations - Other Factors Other factors that your contractor will consider to determine the sizing of the cooling capacity include the direction of your room. If the room is facing east or west, additional capacity is needed as it will be exposed to the morning and evening sun compared to a room that faces north or south.

The respective tables of data were generally developed by using the more complex transfer function method to determine the various cooling loads for different types of heating.

[2] [3] The results gained by doing so are then normalized for each type of heat gain used for the tables, CLTD, CLF, and SCL. Basic Air Conditioning Formulas Application Guide Basic Air Conditioning Formulas TO DETERMINE COOLING Total Airflow Infiltration or Ventilation Number of Air Changes Per Hour – Total Number of Air Changes Per Hour – Outdoor Air Total Heat (HT) Sensible Heat (H S) Latent Heat (HL) Leaving Air D.B.

Temperature (T2) Enthalpy – Leaving Air (h 2)File Size: 65KB. HVAC COOLING LOAD CALCULATIONS AND PRINCIPLES Sensible Heat Gain – is the energy added to the space by conduction, convection and/or radiation.

Latent Heat Gain – is the energy added to the space when moisture is added to the space by means of vapor emitted by the occupants, generated by a process or through air infiltration from outside or adjacent areas.

HVAC Load Calculations Worksheet – HVAC Load Calculator – was designed specifically to accelerate initial design decisions and system selection.

The simplicity and unique compactness allows the design engineer to input, change and manipulate multiple HVAC load variations which can be altered and adjusted on the spot with the output immediately available on screen. Overview of the Radiant Time Series Method Prof.

Jeffrey D. Spitler School of Mechanical and Aerospace Engineering, Oklahoma DOE-2 calculations of custom weighting factors; McQuiston and Harris publish 83 sets Accuracy similar to the Transfer Function Method, with greatly simplified calculation File Size: KB. computer programs.

The RTS is a simplified method derived from heat balance (HB) method and effectively replaces all other simplified (non-heat balanced) methods. For strictly manual cooling loads calculation method, the most practical to use is the CLTD/CLF method.

This course discusses CLTD/CLF method in detail in succeeding sections. An Online Residential Cooling Load Calculation Program K. Yeong and F. Lai Function (TFM). Although recently there is a strong push for the Transfer Function method, the With the help of computer, the load calculations can be made easy and cost-effective 4.

Currently, there are several co mmercial packages available in. methods of performing load calculations, or step-by-step instructions on how to perform the load calculations. This guide presents the key criteria required to create accurate heating and cooling load calculations and offers examples of the implications when inaccurate adjustments are applied to the HVAC design process.

about this page: AC software & programs. This reference page has an index that will guide you directly to air conditioning software and programs for online. This web page focuses on AC computer programs including calculations, diagnostic.

EXTERNAL STATIC PRESSURE CALCULATIONS (esp): ESP For fan selection using ASHRAE duct fitting software Figure: ASHRAE Duct Fitting for ESP BUILDING SURVEY AND LOAD ESTIMATE The primary function of air conditioning is to maintain conditions that are (1) Conductive to human comfort or (2) Required by a product, or process within aFile Size: KB.HAP uses the ASHRAE transfer function method for load calculations and detailed 8, hour-by-hour simulation techniques for the energy analysis.

This program is released as two separate, but similar products. The “HAP System Design Load” program provides system design and load estimating features. The full “HAP” program provides [email protected]{osti_, title = {Calculations for insulated piping systems. [Heat Gain or Loss and Surface Temperature Calculations]}, author = {Siddiqui, M.K.}, abstractNote = {Determining heat gain, heat loss, and surface temperature of insulated piping is made easier by using a computer program.

Determination of heat gain or loss from an uninsulated pipe is convenient, but it .