Determination of coil defrosting loads. Part 2: Instrumentation and data-acquisition systems

This is the second part of a five-part paper reporting on work performed under ASHRAE RP-622, ``A Study to Determine Heat Loads Due to Coil Defrosting.`` The objective of the research program on which this paper partly reports was to obtain quantitative and reliable data on the heat loads associated...

Full description

Saved in:
Bibliographic Details
Main Authors: Al-Mutawa, N.K., Sherif, S.A., Steadham, J.M., Tiedeman, J., West, J., Harker, R.A., Mathur, G.D.
Format: Conference Proceeding
Language:English
Subjects:
DATA ACQUISITION SYSTEMS
DEFROSTING
ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
FREEZERS
HEATING LOAD
INDUSTRIAL PLANTS
MEASURING INSTRUMENTS
PERFORMANCE TESTING
REFRIGERATING MACHINERY
TEST FACILITIES
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This is the second part of a five-part paper reporting on work performed under ASHRAE RP-622, ``A Study to Determine Heat Loads Due to Coil Defrosting.`` The objective of the research program on which this paper partly reports was to obtain quantitative and reliable data on the heat loads associated with defrosting a freezer coil of a frequently used design, employing the hot-gas refrigerant method. It was intended that tests be conducted under conditions that are representative of true-to-life operating conditions of freezers in the field. In this paper of the paper, the instrumentation and data-acquisition systems employed in this project are discussed. The instrumentation system comprises a variety of devices for the measurement of melt weight, frost thickness, temperatures, pressures, refrigerant flow rates, air humidity, and the electric power consumption. The data-acquisition system consists of a computer, software, and data acquisition boards. Details of these two systems are provided.
ISSN:0001-2505