Explorations on efficiency of reconfigurable systems for validation of heat meters in SME
Authors: Tadeusz Goszczynski, Elzbieta Jachczyk
Abstract
Validation of heat meters used for financial settlements between heat supplier and residents of apartments in buildings with central heating systems is the most time consuming part of their production. For SME engaged in this product it is very important to have appropriate instruments and procedures for validation of different type of heat meters. In this paper procedures and instruments for reconfigurable system are proposed and analyzed taking into account its efficiency and uncertainty of measurements.
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Dear Zuhriah
It’s nice that You asked about efficiency and what can decrease (!) the tot value.
Since the volume of paper was limited to 6 pages we had to limit this kind of information to the minimum.
Type of heat meter used by client depends on his heat transfer volume (e.g. apartment, building or factory). Some SMEs in Poland specialize in services of validation of many different types of heat meters (over 50 types on the market). There are many thousands of heatmeters used in houses, buildings and new apartments and all must be validated every 5 years. It’s parameters and characteristics depends on its destination. We wouldn’t like to give producer’s names and types of meters in our paper because we can’t make marketing for them. Reconfigurable system for validation is needed especially in SMEs offering such services. For manufacturer of heat meters the problem is not so important, since they produce only 2 or 3 types with the same type of inputs and output and service signals and can validate it in their factory or give it to the specializing SME. The main characteristic parameters for validation are: time values t1 to t7. Some of the parameters depends on procedure used by designer: t3 and t4 are times needed for generation of test pulses and for counting test output pulses; t1,t2,t6 - depend on size of temperature sensors, which depends on volume of water flawing and size of pipe; t5 and t7 – depend on construction of meter. User (buyer) is not interested in this parameters directly (only through the cost of consecutive validations after every 5 years). Producer knows it. SMEs engaged in validation is very interested in short time of validation since the price of that service is determined by market. Therefore SMEs are interested in universal stands with reconfigurable systems, which are the most efficient, especially if different types of meters coming in large quantities, one type after another should be validated.
Coming back to your second question. Assist companies to select the best meters for their processes:
- client must know (and knows) working characteristic ( flow, size, temperature limits), not validation procedure characteristic ( t1 – t7)
- SMEs looks for profit on validation of them and do not select the best type of meter
I hope this too long answer - answers your questions satisfactorily. If not I’m ready to go on.
Tadeusz
Dear Mr. Tgoszczynski,
Thank you very much for the explanation.
My initial thought on the table 3 was the similar type of heat meter but from different vendors were used for the experiment.
thanks again...
;)
Zuhriah
Dear authors,
The introduced approach for the heat meters validation has contributed to another aspect in the reconfigurable issues.
Obviously, the validation process efficiency has been measured through the time based.
I have one question,
Table 3 shows results of the time of validation.
What kinds of characteristic of the heat meter which could increase the tot value?
Apparently, we could see,
Vendor A - E , tot = lowest/higher
Vendor F - H , tot = lowest/higher
Vendor I , tot = highest
I think by identifying the characteristics of the heat meters, it would assist the company to select the best heat meters for their processes.
Please right me if i'm wrong...
;)
ZE