Contents • • • • • • • • • • CLTD/CLF/SCL cooling load calculation method [ ] The CLTD/CLF/SCL (cooling load temperature difference/cooling load factor/solar cooling load factor) calculation method was first introduced in the 1979 Cooling and Heating Load Manual (GRP-158) The CLTD/CLF/SCL Method is regarded as a reasonably accurate approximation of the total heat gains through a building envelope for the purposes of sizing equipment. This method was developed as a simpler calculation alternative to difficult and unwieldy calculation methods such as the transfer function method and the method. Error when using the CLTD/CLF/SCL method tends to be less than twenty percent over and less than ten percent under.

History [ ] After its introduction in the 1979 handbook, research continued on increasing the accuracy of the CLTD/CLF method. Research completed in 1984 revealed some factors which were not accounted for in the original publication of the method; these findings were a result of the research project 359. In 1988 Research Project 472 worked to correct these oversights with the introduction of a classification system for walls, roofs, and zones. Additionally, a weighting factor database was generated to help correct for previous inaccuracies. Additional research in and appliance heat gain with respect to CLTD data was also completed shortly after the original publication of the method. The advancements in each of these areas inspired a revision/compilation effort, and in 1993 the CLTD/CLF/SCL method was succinctly compiled by Spitler, McQuiston, and Lindsey. Application [ ] The CLTD/CLF/SCL method uses predetermined set of data to expedite and simplify the process of cooling/heating load approximation. Print2cad 2016 Crack Law on this page.

The data is divided into many different sections based on many different variables. These variables include, building material of the envelope, thicknesses of the building materials, day of the year, time of day, orientation of the surface (e.g. Wall or roof, 90 degrees or 180), and wall face orientation (cardinal directions, i.e. N, NW, S, SE, etc.), to name a few.

For terminal- heating and cooling units that are not supplied with. Measurement, monitoring, trending, calculating and alarming. Equipment manufacturers for the furnishing /installing of the sensors. Refer to Sectj-ons 15852, 15853, 15854, 15855 and 15857. Any sensors not factorv provided shal_l- be field provided. American Society of Heating, Refrigerating and Air-conditioning Engineers (ASHRAE). Provide design of bracing for all piping that exceeds the limitations of the SMACNA Seismic. Restraint Manual. Signed and sealed calculations and. Rubber hose manufactured by Gilmore Group Model No.

In order to determine which set of CLTD/CLF/SCL data to look at, all the requisite variables must be defined. Efi Rastek H650 Manual Lawn there. The respective tables of data were generally developed by using the more complex to determine the various cooling loads for different types of heating. The results gained by doing so are then normalized for each type of heat gain used for the tables, CLTD, CLF, and SCL. Explanation of variables [ ] The first of the cooling load factors used in this method is the CLTD, or the Cooling Load Temperature Difference. This factor is used to represent the temperature difference between indoor and outdoor air with the inclusion of the heating effects of. The second factor is the CLF, or the cooling load factor. Sonar Instrument Definitions Korg.

This coefficient accounts for the time lag between the outdoor and indoor temperature peaks. Depending on the properties of the building envelope, a delay is present when observing the amount of heat being transferred inside from the outdoors. The CLF is the cooling load at a given time compared to the heat gain from earlier in the day. The SC, or, is used widely in the evaluation of heat gain through glass and windows.