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Derek M
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Derek M
@derek-m
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Illustrious Member
Joined: Mar 4, 2021
Last seen: Sep 19, 2024
Profile Activity
Topics: 7 / Replies: 4405
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RE: What do we need to know before installing a heat pump?

Now that statement I can agree with. The problem is that in mild weather conditions it is not possible to run heat pumps continuously, whatever you ...

2 years ago
Forum
Government Schemes, Regulations, Planning & Organisations
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RE: What do we need to know before installing a heat pump?

I'm not changing the fundamentals, there is a minimum thermal energy output that a given heat pump can produce when operating at its lowest possible o...

2 years ago
Forum
Government Schemes, Regulations, Planning & Organisations
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RE: What do we need to know before installing a heat pump?

@iancalderbank In your situation an Air 2 Air heat pump system would probably have been much more efficient and cost effective. I know, too late now...

2 years ago
Forum
Government Schemes, Regulations, Planning & Organisations
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RE: What do we need to know before installing a heat pump?

I would be interested to know how he ties the harmonics to heat pumps, rather than EV chargers or battery chargers or solar PV inverters? Is he anti h...

2 years ago
Forum
Government Schemes, Regulations, Planning & Organisations
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RE: What do we need to know before installing a heat pump?

I think that you may have taken my comment out of context, since I was referring more to short cycling rather than just general cycling. I think tha...

2 years ago
Forum
Government Schemes, Regulations, Planning & Organisations
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RE: What do we need to know before installing a heat pump?

I think that we may be referring to different things when we talk about harmonics. To me harmonics are frequencies above 50hz, often caused by inducti...

2 years ago
Forum
Government Schemes, Regulations, Planning & Organisations
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RE: What do we need to know before installing a heat pump?

I have just found the info linked below, which would seem to indicate that PWM uses Zero Crossing control rather than Phase Angle.

2 years ago
Forum
Government Schemes, Regulations, Planning & Organisations
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RE: What do we need to know before installing a heat pump?

To be quite honest, without looking inside a heat pump unit to see what motor is actually fitted, I can only assume that it will be an AC induction mo...

2 years ago
Forum
Government Schemes, Regulations, Planning & Organisations
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RE: What do we need to know before installing a heat pump?

First of all the entire operating range of required output from a heat pump, can go from no heating required at all, to possibly over 100% of maximum ...

2 years ago
Forum
Government Schemes, Regulations, Planning & Organisations
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RE: What do we need to know before installing a heat pump?

I'm afraid it is not quite that simple when one looks at the big picture. So if every household in the country switches to a heat pump before next W...

2 years ago
Forum
Government Schemes, Regulations, Planning & Organisations
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RE: What do we need to know before installing a heat pump?

@jamespa Some re-balancing of gas and electricity prices has already taken place, since electricity prices are 3 times higher, whilst gas has been i...

2 years ago
Forum
Government Schemes, Regulations, Planning & Organisations
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RE: What do we need to know before installing a heat pump?

@cathoderay I remember reading an article several years ago, about the amount of available energy from the ocean currents flowing around the British...

2 years ago
Forum
Government Schemes, Regulations, Planning & Organisations
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