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Lowering the chilled water temperature will result in an increase in the latent cooling effect.

With a ground source heat pump, you'll have large initial capital costs to install the piles or slinky system. Why don't you consider an air source heat pump? The technology is more advanced and unless you have particularly low ambients in winter the running costs for air source heat pumps are...

The cell containing the units is a pull-down list, so you just click on the down arrow and the range of units appears for you to select from. If this feature isn't working, maybe you need to check that macros are enabled on your version of Excel. Good luck...

I have written an Excel spreadsheet that calculates these values, and corrects the thermophyical values for differing glycol concentrations and temperatures. Let me know if it helps. Cooky ps. the e-mail address in the program description has...

whenever fluid travels along a pipe, there will always be some pressure drop, albeit very low if the pipe is large enough. Here's a pressure drop calculator I developed a couple of years ago, you may find it helpful. http://mysite.wanadoo-members.co.uk/pressure_drop2/index.html Good luck Cooky

I opened this thread, intending to contribute my experiences of chiller COP to the discussion. Instead, I was too distracted with the use of metric AND imperial units to create a ratio!! Please use either metric OR imperial units (preferably metric). Sorry for the rant, but I had to say...

Has any chiller manufacturer tested this product? Very unlikely.

How about energy conservation or waste minimization of plant and equipment. There is a huge scope within energy conservation for a MEng project, and it is very topical, especially with the increase in energy prices (especially here in the UK). I have just completed my project for a MEng degree...

I can't comment on the specific chiller you mention. However, I can tell you that with chillers, you get what you pay for. The lowest priced chiller will probably suffer with a greater number of breakdowns. The noise level may be higher, and the chiller COP will almost certainly be lower. My...

It's a good and reliable chiller.

Thanks your your advice Dan. We dropped the OPC server and wrote a Visual Basic program to poll the serial card directly. This works great and we have good reliable communication via the radio modems. The tech support from the modem suppliers is very good...

Hi, I am trying to communicate with a Lange SC100 controller using a Modbus protocol operating on RS485. I have established 'hard wired' communication with an OPC server running on a PC with Win XP. Having established hard wired communication, I am now using a pair of X8200 wireless modems...

Hi Thor, We have EXACTLY the same problem. Basically, the FP2000 cannot support ActiveX, and this is required by the ADO commands to connect to SQL. The best solution we have found is to 'publish' the data over the local network, then you'll need to write & deploy another VI on the client...

Hi, Here's my problem: I am measuring the flow rate from a flow meter, the device gives me a 4 - 20mA signal which I am sending to a National Instruments controler. The flow meter is calibrated in kg/hr, and I need to convert the analogue signal into a totalized flow (kg). I know this can be...

Thanks, Cooky

Does anyone have typical steam loss rates, which would give me the approximate consumption of steam through a passing steam trap. Ideally, I need this information for standard trap sizes (1/2", 3/4" & 1"), and for different types of traps (inverted bucket, TD, float etc). I've contacted a...

I have developed a small program that calculates pressure drop in pipes. http://mysite.wanadoo-members.co.uk/pressure_drop2 Feel free to use part of my program if you wish. Good luck and happy learning!!

Hi Friar, I know what you mean, some of the so-called professionally organized seminars are very expensive!!. I'm attending a one-day seminar soon, that's organized by BISRIA, it's only £100 (not too bad!!). Equipment manufacturers are a good source of free CPD seminars, they use the...

Hi Stonecold, You're on the right track with a plan to monitor the flow and temperatures for each process loop, make sure you also monitor the chiller in the same way. If it's a new system, can you talk to the guy who designed the system?. Also, was the chilled water system properly balanced...

Hi TrucTracy, Look at one of my sites: http://mysite.wanadoo-members.co.uk/pressure_drop2 It isn't designed to calculate flows of oil, but you may find it helpfull. Regards, Cooky