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1 jan. 2022:
ADVIESBUREAU HUIBERTS CELEBRATES
ITS 23th ANNIVERSARY !!!!!!!!!


2019-2021:
Gradually the whole Andover Controls-BMS in de Rotterdam Wilhelminahof-complex is replaced by Priva, in cooperation with Adviesbureau Huiberts.

spring 2015:
Control of temp/hum. in operating rooms
In some operating rooms of a hospital in the south of the Netherlands unacceptable fluctuations of temperature and humidity occurred. Adviesbureau Huiberts has solved the problem by using dynamic adaptive parameters in the control algorithms of the AHU's.

summer 2014:
Interesting work completed
For a nursing-home in Alphen a/d Rijn software has been developped and tested for an installation with solarpanels, heatpump and heat/cold-storage-system.

march 2011:
Article about guarding of running-hours
published in TVVL-Magazine
by Ir. J.C.H. (Hans) Huiberts

Summary:
Existing installations tend to use more and more energy due to failing installations, complaints of office-personel, inexpert operation, bad service, etc. In a free-programmable BMS it is possible to compare running hours of installation-parts with theoretical values on a daily or weekly basis and give an alarmmessage in case of excess of over 10 % (f.e.). Apart from running hours, operational situations can be guarded in the same way. Such innovative monitoring has been applied to a large office complex in Rotterdam for more than one year now. The program in this BMS is guarding the actions of operational and service-personel, the running of installations and it's own application software. Putting such intelligence into a BMS results in a surpassing level of automation, with lower energy-, survey- and service-costs.

aug. 2009:
First guarding of running-hours in the Netherlands:
Adviesbureau Huiberts has started its new and unique programm for the guarding of running-hours in an extensive project. After fixed periods the BMS will automically compare the running-hours of installations with theoretical values and generate an alarm if running-hours are too high. In this way unneccesary energy-use can be avoided, f.e. due to incorrect setvalues, faulty software, etc.

july 2009:
Energy cost-reduction:
After a thorough investigation Adviesbureau Huiberts have been able to advise a customer in Rotterdam to lower the capacity of the heat-exchanger of the District Heating Company, by which an annual cost reduction of about 35.000 Euro's will be realised starting from 2010.

jan. 2009:
PRIVA:
While checking a Priva-BMS, faulty sequence-controls and instabel processes are fixed by Adviesbureau Huiberts.


1 jan. 2009:
ADVIESBUREAU HUIBERTS CELEBRATES
ITS TENTH ANNIVERSARY !!!!!!!!!



jan. 2008:
Importation of electricity-measurements:
In a hospital in the south of The Netherlands the measurements of some Schneider-Powermeters are imported into the BMS via Modbus. The BMS calculates and registrates a.o. electricity-usage per quarter, hour, day, month and year. Furthermore, the following is executed: Logging of maximum powers, alarming when exceeding a setvalue, etc.

sept. 2007:
Registration of running-hours:
Adviesbureau Huiberts look for some projects to test a recently developed advanced calculation of running-hours per adjustable time period. This routine can be a unique tool for energy management (if you know how to use it).

june 2007:
Energy cost-reduction:
After a thorough investigation and some adaptions of the application-software Adviesbureau Huiberts have been able to advise a customer in The Hague to change his contract with the District Heating Company, by which an annual cost reduction of about 15.000 Euro's will be realised starting from 2008.

april 2007:
Degree-days-registration:
For a customer in Utrecht a degree-day-registration has been implemented in the BMS. The consumption of heat per day, month and year will automatically be devided by the number of degree-days over the same period. Herewith the energy -use in colder and less cold winterperiods can be compared.

february 2007:
Priva: Peak load-shaving for gas
In The Netherlands companies and institutions are limited in their hourly gas consumption by the gas suppliers and will have a big penalty when the contract-value is exceeded. This penalty can amount up to 150 Euro per m3 gas, based on the maximum usage over the year.
In february 2007 the Dutch marketleader Priva introduces a new software-module: "Peakshaving for gas". In a period of one hour, 4 points of time with matched maximum-consumption of gas must be defined by the user and when these values are exceeded, some (software-)outputs will be closed (max. 4 pcs.) in a fixed order, by which certain gas-users (like boilers, groups) can be blocked.
As much as 4 years earlier, in 2003 (see below), Adviesbureau Huiberts introduced thear first "Peak-Gas-shaving" programs. By using smart extrapolations in the calculation of the forecasted hourly gas-consumption. The user only has to set the maximum allowed hourly gas-consumption in his BMS. Which gas-consuming-installations will be blocked and for how long, is programmed in the software. The Total-Energy-system, boilers, radiatorgoups, etc. wil be switched ON and OFF in an optimal way and not in a fixed order or with any restriction. The software of Adviesbureau Huiberts is taylor-made and will give the best results.

january 2007:
Improvement of optimal start procedures:
In projects with district heating, the heating of a cold building in the morning will take a much longer time than in a building with its own boiler(s). This is caused by the outside-air-temperature-dependent supply-watertemperature of the district-heating. In some district-heated buildings the optimal start procedures are adapted by Adviesbureau Huiberts, with an addition for the number of degree-days, which is calculated during the period of non-heating. This has a certain relation with the amount of heat that has to be put into the building before occupancy-hours. The result is excellent: no complaints anymore.

october 2006:
Energy-cost-reduction:
After an investigation and some adaptions of the software, Adviesbureau Huiberts have been able to advise a customer in Rotterdam to change his contract with the district-heating company, resulting in a cost reduction of about 45.000 Euro per year, starting from 2007!!
(Costs of the investigation: about 5.000 Euro)

spring 2006:
Buffer-loading/unloading:
In a project in Rotterdam 6 chillers dropped into failure very often when they were running at low capacity in spring and autumn. This problem is solved by making use of the chilled-water-buffers, which are loaded by the chillers in a short time (about 10 minutes) at high capacity and unloaded with the chillers switched off (for about half an hour).

spring 2004:
Tap water boosting i.c.w. Total Energy:
Due to legionella-danger, tap water temperatures in some projects were set gradually higher and higher by the management. This resulted in a continously hot heating water-system, also in summertime. The Total-Energy-systems were switched off, or in failure, because of a too high inlet-temperature. They had very low numbers of running hours per year.
For legionella-fighting it is not necessary to maintain a continuously high tap water temperature. Very often a temperature above 60 °C during about 15 minutes per day is sufficient to kill the bacteria.
By boosting the heatingwater temperature for one hour during the night, legionella-regulations are fullfilled and for the rest of the day the setvalue of the heatingwater temperature can be much lower, by which the Total-Energy-systems are running during almost the whole year round now.


2003/2004/2005/2006:
Peak-gas-shaving:
In The Netherlands customers have to pay monthly a fixed rate for the maximum number of m³ gas per hour, which is layed down in the delivery-contract. Exceeding this amount can result in a penalty of upto 150 Euro's per m³ gas at the end of the year!
In some projects, amongst others an extensive building-complex in Ermelo and a hospital in Helmond, the software for the control of the boilers and the Total-Energy-system is adapted by Adviesbureau Huiberts, to have the total gas-consumtion under control by switching them on and off.
The hourly gas-consumption was registrated during some winters and with regard to this, the contract-value for maximum number of m³ gas per hour was lowered, which resulted in a yearly cost reduction of over 10.000 Euro.
During each hour the gas-consumption is measured and extrapolated to a forecast of the value at the end of the hour. If this value exceeds the contract-value, one or more boilers are switched off temporarely. By doing this, high penalties can be avoided.

Adviesbureau Huiberts have introduced this idea "peak-gas-shaving" already in 2003 on the Dutch Market. It is a variant of the wellknown "peak-load-shaving" for electricity.

 


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